kernel/trace/trace_syscalls.c in the Linux kernel through 3.17.2 does not properly handle private syscall numbers during use of the perf subsystem, which allows local users to cause a denial of service (out-of-bounds read and OOPS) or bypass the ASLR protection mechanism via a crafted application.

According to the versions of the kernel packages installed, the EulerOS Virtualization for ARM 64 installation on the remote host is affected by the following vulnerabilities :

  - The NFSv2 and NFSv3 server implementations in the Linux     kernel through 4.10.13 lacked certain checks for the     end of a buffer. A remote attacker could trigger a     pointer-arithmetic error or possibly cause other     unspecified impacts using crafted requests related to     fs/nfsd/nfs3xdr.c and     fs/nfsd/nfsxdr.c.(CVE-2017-7895i1/4%0

  - A flaw was found in the Linux kernel's ACPI subsystem     where a function does not flush the operand cache and     causes a kernel stack dump. This allows local users to     obtain sensitive information from kernel memory and     bypass the KASLR protection mechanism when using a     specially crafted ACPI table.(CVE-2017-13695i1/4%0

  - It was found that fanout_add() in     'net/packet/af_packet.c' in the Linux kernel, before     version 4.13.6, allows local users to gain privileges     via crafted system calls that trigger mishandling of     packet_fanout data structures, because of a race     condition (involving fanout_add and packet_do_bind)     that leads to a use-after-free bug.(CVE-2017-15649i1/4%0

  - Race condition in kernel/ucount.c in the Linux kernel     through 4.10.2 allows local users to cause a denial of     service (use-after-free and system crash) or possibly     have unspecified other impact via crafted system calls     that leverage certain decrement behavior that causes     incorrect interaction between put_ucounts and     get_ucounts.(CVE-2017-6874i1/4%0

  - An out-of-bounds memory access flaw, CVE-2014-7825, was     found in the syscall tracing functionality of the Linux     kernel's perf subsystem. A local, unprivileged user     could use this flaw to crash the system. Additionally,     an out-of-bounds memory access flaw, CVE-2014-7826, was     found in the syscall tracing functionality of the Linux     kernel's ftrace subsystem. On a system with ftrace     syscall tracing enabled, a local, unprivileged user     could use this flaw to crash the system, or escalate     their privileges.(CVE-2014-7825i1/4%0

  - The Salsa20 encryption algorithm in the Linux kernel,     before 4.14.8, does not correctly handle zero-length     inputs. This allows a local attacker the ability to use     the AF_ALG-based skcipher interface to cause a denial     of service (uninitialized-memory free and kernel crash)     or have an unspecified other impact by executing a     crafted sequence of system calls that use the     blkcipher_walk API. Both the generic implementation     (crypto/salsa20_generic.c) and x86 implementation     (arch/x86/crypto/salsa20_glue.c) of Salsa20 are     vulnerable.(CVE-2017-17805i1/4%0

  - The msm_ipc_router_bind_control_port function in     net/ipc_router/ipc_router_core.c in the IPC router     kernel module for the Linux kernel 3.x, as used in     Qualcomm Innovation Center (QuIC) Android contributions     for MSM devices and other products, does not verify     that a port is a client port, which allows attackers to     gain privileges or cause a denial of service (race     condition and list corruption) by making many     BIND_CONTROL_PORT ioctl calls.(CVE-2016-2059i1/4%0

  - The do_remount function in fs/namespace.c in the Linux     kernel through 3.16.1 does not maintain the     MNT_LOCK_READONLY bit across a remount of a bind mount,     which allows local users to bypass an intended     read-only restriction and defeat certain sandbox     protection mechanisms via a 'mount -o remount' command     within a user namespace.(CVE-2014-5206i1/4%0

  - The ati_remote2_probe function in     drivers/input/misc/ati_remote2.c in the Linux kernel     before 4.5.1 allows physically proximate attackers to     cause a denial of service (NULL pointer dereference and     system crash) via a crafted endpoints value in a USB     device descriptor.(CVE-2016-2185i1/4%0

  - It was found that the fix for CVE-2014-3601 was     incomplete: the Linux kernel's kvm_iommu_map_pages()     function still handled IOMMU mapping failures     incorrectly. A privileged user in a guest with an     assigned host device could use this flaw to crash the     host.(CVE-2014-8369i1/4%0

  - A NULL pointer dereference was found in     net/rds/rdma.c:__rds_rdma_map() function in the Linux     kernel allowing local attackers to cause a system panic     and a denial-of-service.(CVE-2018-7492i1/4%0

  - An issue was discovered in the XFS filesystem in     fs/xfs/xfs_icache.c in the Linux kernel. There is a     NULL pointer dereference leading to a system panic in     lookup_slow() on a NULL inode-i1/4zi_ops pointer when     doing pathwalks on a corrupted xfs image. This occurs     because of a lack of proper validation that cached     inodes are free during an allocation.(CVE-2018-13093i1/4%0

  - The iowarrior_probe function in     drivers/usb/misc/iowarrior.c in the Linux kernel before     4.5.1 allows physically proximate attackers to cause a     denial of service (NULL pointer dereference and system     crash) via a crafted endpoints value in a USB device     descriptor.(CVE-2016-2188i1/4%0

  - Linux kernel built with the 802.1Q/802.1ad     VLAN(CONFIG_VLAN_8021Q) OR Virtual eXtensible Local     Area Network(CONFIG_VXLAN) with Transparent Ethernet     Bridging(TEB) GRO support, is vulnerable to a stack     overflow issue. It could occur while receiving large     packets via GRO path, as an unlimited recursion could     unfold in both VLAN and TEB modules, leading to a stack     corruption in the kernel.(CVE-2016-7039i1/4%0

  - The msr_mtrr_valid function in arch/x86/kvm/mtrr.c in     the Linux kernel before 4.6.1 supports MSR 0x2f8, which     allows guest OS users to read or write to the     kvm_arch_vcpu data structure, and consequently obtain     sensitive information or cause a denial of service     (system crash), via a crafted ioctl     call.(CVE-2016-3713i1/4%0

  - A flaw was found in the way the Linux kernel's VFS     subsystem handled reference counting when performing     unmount operations on symbolic links. A local,     unprivileged user could use this flaw to exhaust all     available memory on the system or, potentially, trigger     a use-after-free error, resulting in a system crash or     privilege escalation.(CVE-2014-5045i1/4%0

  - The KEYS subsystem in the Linux kernel before 4.13.10     does not correctly synchronize the actions of updating     versus finding a key in the 'negative' state to avoid a     race condition, which allows local users to cause a     denial of service or possibly have unspecified other     impact via crafted system calls.(CVE-2017-15951i1/4%0

  - The skb_flow_dissect function in     net/core/flow_dissector.c in the Linux kernel through     3.12 allows remote attackers to cause a denial of     service (infinite loop) via a small value in the IHL     field of a packet with IPIP     encapsulation.(CVE-2013-4348i1/4%0

  - The Linux kernel through 3.17.4 does not properly     restrict dropping of supplemental group memberships in     certain namespace scenarios, which allows local users     to bypass intended file permissions by leveraging a     POSIX ACL containing an entry for the group category     that is more restrictive than the entry for the other     category, aka a 'negative groups' issue, related to     kernel/groups.c, kernel/uid16.c, and     kernel/user_namespace.c.(CVE-2014-8989i1/4%0

  - An infinite-loop flaw was found in the kernel. When a     local user calls the sys_writev syscall with a     specially crafted sequence of iov structs, the     fuse_fill_write_pages kernel function might never     terminate, instead continuing in a tight loop. This     process cannot be terminated and requires a     reboot.(CVE-2015-8785i1/4%0

Note that Tenable Network Security has extracted the preceding description block directly from the EulerOS security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

According to the versions of the kernel packages installed, the EulerOS Virtualization installation on the remote host is affected by the following vulnerabilities :

  - A race condition flaw was found in the way the Linux     kernel's mmap(2), madvise(2), and fallocate(2) system     calls interacted with each other while operating on     virtual memory file system files. A local user could     use this flaw to cause a denial of     service.(CVE-2014-4171)

  - An information leak flaw was found in the way the Linux     kernel's Advanced Linux Sound Architecture (ALSA)     implementation handled access of the user control's     state. A local, privileged user could use this flaw to     leak kernel memory to user space.(CVE-2014-4652)

  - A use-after-free flaw was found in the way the Linux     kernel's Advanced Linux Sound Architecture (ALSA)     implementation handled user controls. A local,     privileged user could use this flaw to crash the     system.(CVE-2014-4653)

  - A use-after-free flaw was found in the way the Linux     kernel's Advanced Linux Sound Architecture (ALSA)     implementation handled user controls. A local,     privileged user could use this flaw to crash the     system.(CVE-2014-4654)

  - A use-after-free flaw was found in the way the Linux     kernel's Advanced Linux Sound Architecture (ALSA)     implementation handled user controls. A local,     privileged user could use this flaw to crash the     system.(CVE-2014-4655)

  - An integer overflow flaw was found in the way the Linux     kernel's Advanced Linux Sound Architecture (ALSA)     implementation handled user controls. A local,     privileged user could use this flaw to crash the     system.(CVE-2014-4656)

  - An integer underflow flaw was found in the way the     Linux kernel's Stream Control Transmission Protocol     (SCTP) implementation processed certain COOKIE_ECHO     packets. By sending a specially crafted SCTP packet, a     remote attacker could use this flaw to prevent     legitimate connections to a particular SCTP server     socket to be made.(CVE-2014-4667)

  - 'It was found that the Linux kernel's ptrace subsystem     allowed a traced process' instruction pointer to be set     to a non-canonical memory address without forcing the     non-sysret code path when returning to user space. A     local, unprivileged user could use this flaw to crash     the system or, potentially, escalate their privileges     on the system.

  - Note: The CVE-2014-4699 issue only affected systems     using an Intel CPU.(CVE-2014-4699)'

  - A flaw was found in the way the pppol2tp_setsockopt()     and pppol2tp_getsockopt() functions in the Linux     kernel's PPP over L2TP implementation handled requests     with a non-SOL_PPPOL2TP socket option level. A local,     unprivileged user could use this flaw to escalate their     privileges on the system.(CVE-2014-4943)

  - A flaw was found in the way the Linux kernel's VFS     subsystem handled reference counting when performing     unmount operations on symbolic links. A local,     unprivileged user could use this flaw to exhaust all     available memory on the system or, potentially, trigger     a use-after-free error, resulting in a system crash or     privilege escalation.(CVE-2014-5045)

  - A NULL pointer dereference flaw was found in the way     the Linux kernel's Stream Control Transmission Protocol     (SCTP) implementation handled simultaneous connections     between the same hosts. A remote attacker could use     this flaw to crash the system.(CVE-2014-5077)

  - It was found that the parse_rock_ridge_inode_internal()     function of the Linux kernel's ISOFS implementation did     not correctly check relocated directories when     processing Rock Ridge child link (CL) tags. An attacker     with physical access to the system could use a     specially crafted ISO image to crash the system or,     potentially, escalate their privileges on the     system.(CVE-2014-5471)

  - It was found that the parse_rock_ridge_inode_internal()     function of the Linux kernel's ISOFS implementation did     not correctly check relocated directories when     processing Rock Ridge child link (CL) tags. An attacker     with physical access to the system could use a     specially crafted ISO image to crash the system or,     potentially, escalate their privileges on the     system.(CVE-2014-5472)

  - A stack overflow flaw caused by infinite recursion was     found in the way the Linux kernel's Universal Disk     Format (UDF) file system implementation processed     indirect Information Control Blocks (ICBs). An attacker     with physical access to the system could use a     specially crafted UDF image to crash the     system.(CVE-2014-6410)

  - Buffer overflow in net/ceph/auth_x.c in Ceph, as used     in the Linux kernel before 3.16.3, allows remote     attackers to cause a denial of service (memory     corruption and panic) or possibly have unspecified     other impact via a long unencrypted auth     ticket.(CVE-2014-6416)

  - net/ceph/auth_x.c in Ceph, as used in the Linux kernel     before 3.16.3, does not properly consider the     possibility of kmalloc failure, which allows remote     attackers to cause a denial of service (system crash)     or possibly have unspecified other impact via a long     unencrypted auth ticket.(CVE-2014-6417)

  - net/ceph/auth_x.c in Ceph, as used in the Linux kernel     before 3.16.3, does not properly validate auth replies,     which allows remote attackers to cause a denial of     service (system crash) or possibly have unspecified     other impact via crafted data from the IP address of a     Ceph Monitor.(CVE-2014-6418)

  - A NULL pointer dereference flaw was found in the way     the Linux kernel's Common Internet File System (CIFS)     implementation handled mounting of file system shares.
    A remote attacker could use this flaw to crash a client     system that would mount a file system share from a     malicious server.(CVE-2014-7145)

  - A denial of service flaw was found in the way the Linux     kernel's XFS file system implementation ordered     directory hashes under certain conditions. A local     attacker could use this flaw to corrupt the file system     by creating directories with colliding hash values,     potentially resulting in a system crash.(CVE-2014-7283)

  - An out-of-bounds memory access flaw, CVE-2014-7825, was     found in the syscall tracing functionality of the Linux     kernel's perf subsystem. A local, unprivileged user     could use this flaw to crash the system. Additionally,     an out-of-bounds memory access flaw, CVE-2014-7826, was     found in the syscall tracing functionality of the Linux     kernel's ftrace subsystem. On a system with ftrace     syscall tracing enabled, a local, unprivileged user     could use this flaw to crash the system, or escalate     their privileges.(CVE-2014-7825)

  - An out-of-bounds memory access flaw, CVE-2014-7825, was     found in the syscall tracing functionality of the Linux     kernel's perf subsystem. A local, unprivileged user     could use this flaw to crash the system. Additionally,     an out-of-bounds memory access flaw, CVE-2014-7826, was     found in the syscall tracing functionality of the Linux     kernel's ftrace subsystem. On a system with ftrace     syscall tracing enabled, a local, unprivileged user     could use this flaw to crash the system, or escalate     their privileges.(CVE-2014-7826)

Note that Tenable Network Security has extracted the preceding description block directly from the EulerOS security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

Updated kernel packages that fix multiple security issues and several bugs are now available for Red Hat Enterprise Linux 6.

Red Hat Product Security has rated this update as having Important security impact. Common Vulnerability Scoring System (CVSS) base scores, which give detailed severity ratings, are available for each vulnerability from the CVE links in the References section.

The kernel packages contain the Linux kernel, the core of any Linux operating system.

* A flaw was found in the way seunshare, a utility for running executables under a different security context, used the capng_lock functionality of the libcap-ng library. The subsequent invocation of suid root binaries that relied on the fact that the setuid() system call, among others, also sets the saved set-user-ID when dropping the binaries' process privileges, could allow a local, unprivileged user to potentially escalate their privileges on the system. Note: the fix for this issue is the kernel part of the overall fix, and introduces the PR_SET_NO_NEW_PRIVS functionality and the related SELinux exec transitions support. (CVE-2014-3215, Important)

* A use-after-free flaw was found in the way the Linux kernel's SCTP implementation handled authentication key reference counting during INIT collisions. A remote attacker could use this flaw to crash the system or, potentially, escalate their privileges on the system.
(CVE-2015-1421, Important)

* It was found that the Linux kernel's KVM implementation did not ensure that the host CR4 control register value remained unchanged across VM entries on the same virtual CPU. A local, unprivileged user could use this flaw to cause a denial of service on the system.
(CVE-2014-3690, Moderate)

* An out-of-bounds memory access flaw was found in the syscall tracing functionality of the Linux kernel's perf subsystem. A local, unprivileged user could use this flaw to crash the system.
(CVE-2014-7825, Moderate)

* An out-of-bounds memory access flaw was found in the syscall tracing functionality of the Linux kernel's ftrace subsystem. On a system with ftrace syscall tracing enabled, a local, unprivileged user could use this flaw to crash the system, or escalate their privileges.
(CVE-2014-7826, Moderate)

* It was found that the Linux kernel memory resource controller's (memcg) handling of OOM (out of memory) conditions could lead to deadlocks. An attacker able to continuously spawn new processes within a single memory-constrained cgroup during an OOM event could use this flaw to lock up the system. (CVE-2014-8171, Moderate)

* A race condition flaw was found in the way the Linux kernel keys management subsystem performed key garbage collection. A local attacker could attempt accessing a key while it was being garbage collected, which would cause the system to crash. (CVE-2014-9529, Moderate)

* A stack-based buffer overflow flaw was found in the TechnoTrend/Hauppauge DEC USB device driver. A local user with write access to the corresponding device could use this flaw to crash the kernel or, potentially, elevate their privileges on the system.
(CVE-2014-8884, Low)

* An information leak flaw was found in the way the Linux kernel's ISO9660 file system implementation accessed data on an ISO9660 image with RockRidge Extension Reference (ER) records. An attacker with physical access to the system could use this flaw to disclose up to 255 bytes of kernel memory. (CVE-2014-9584, Low)

Red Hat would like to thank Andy Lutomirski for reporting CVE-2014-3215 and CVE-2014-3690, Robert Swiecki for reporting CVE-2014-7825 and CVE-2014-7826, and Carl Henrik Lunde for reporting CVE-2014-9584. The CVE-2015-1421 issue was discovered by Sun Baoliang of Red Hat.

This update also fixes several bugs. Documentation for these changes is available from the Technical Notes document linked to in the References section.

All kernel users are advised to upgrade to these updated packages, which contain backported patches to correct these issues. The system must be rebooted for this update to take effect.

* A flaw was found in the way seunshare, a utility for running executables under a different security context, used the capng_lock functionality of the libcap-ng library. The subsequent invocation of suid root binaries that relied on the fact that the setuid() system call, among others, also sets the saved set-user-ID when dropping the binaries' process privileges, could allow a local, unprivileged user to potentially escalate their privileges on the system. Note: the fix for this issue is the kernel part of the overall fix, and introduces the PR_SET_NO_NEW_PRIVS functionality and the related SELinux exec transitions support. (CVE-2014-3215, Important)

* A use-after-free flaw was found in the way the Linux kernel's SCTP implementation handled authentication key reference counting during INIT collisions. A remote attacker could use this flaw to crash the system or, potentially, escalate their privileges on the system.
(CVE-2015-1421, Important)

* It was found that the Linux kernel's KVM implementation did not ensure that the host CR4 control register value remained unchanged across VM entries on the same virtual CPU. A local, unprivileged user could use this flaw to cause a denial of service on the system.
(CVE-2014-3690, Moderate)

* An out-of-bounds memory access flaw was found in the syscall tracing functionality of the Linux kernel's perf subsystem. A local, unprivileged user could use this flaw to crash the system.
(CVE-2014-7825, Moderate)

* An out-of-bounds memory access flaw was found in the syscall tracing functionality of the Linux kernel's ftrace subsystem. On a system with ftrace syscall tracing enabled, a local, unprivileged user could use this flaw to crash the system, or escalate their privileges.
(CVE-2014-7826, Moderate)

* It was found that the Linux kernel memory resource controller's (memcg) handling of OOM (out of memory) conditions could lead to deadlocks. An attacker able to continuously spawn new processes within a single memory- constrained cgroup during an OOM event could use this flaw to lock up the system. (CVE-2014-8171, Moderate)

* A race condition flaw was found in the way the Linux kernel keys management subsystem performed key garbage collection. A local attacker could attempt accessing a key while it was being garbage collected, which would cause the system to crash. (CVE-2014-9529, Moderate)

* A stack-based buffer overflow flaw was found in the TechnoTrend/Hauppauge DEC USB device driver. A local user with write access to the corresponding device could use this flaw to crash the kernel or, potentially, elevate their privileges on the system.
(CVE-2014-8884, Low)

* An information leak flaw was found in the way the Linux kernel's ISO9660 file system implementation accessed data on an ISO9660 image with RockRidge Extension Reference (ER) records. An attacker with physical access to the system could use this flaw to disclose up to 255 bytes of kernel memory. (CVE-2014-9584, Low)

The system must be rebooted for this update to take effect.

The remote Oracle Linux 6 host has packages installed that are affected by multiple vulnerabilities as referenced in the ELSA-2015-0864 advisory.

    - [infiniband] core: Prevent integer overflow in ib_umem_get address arithmetic (Doug Ledford) [1181173     1179327] {CVE-2014-8159}
    - [security] keys: close race between key lookup and freeing (Radomir Vrbovsky) [1179849 1179850]     {CVE-2014-9529}
    - [net] sctp: fix slab corruption from use after free on INIT collisions (Daniel Borkmann) [1196587     1135425] {CVE-2015-1421}
    - [x86] kvm: vmx: invalid host cr4 handling across vm entries (Jacob Tanenbaum) [1153326 1153327]     {CVE-2014-3690}
    - [fs] isofs: Fix unchecked printing of ER records (Radomir Vrbovsky) [1180481 1180492] {CVE-2014-9584}
    - [media] ttusb-dec: buffer overflow in ioctl (Alexander Gordeev) [1170971 1167115] {CVE-2014-8884}
    - [kernel] trace: insufficient syscall number validation in perf and ftrace subsystems (Jacob Tanenbaum)     [1161567 1161568] {CVE-2014-7826 CVE-2014-7825}
    - [mm] memcg: do not allow task about to OOM kill to bypass the limit (Johannes Weiner) [1198110 1088334]     {CVE-2014-8171}
    - [mm] memcg: do not declare OOM from __GFP_NOFAIL allocations (Johannes Weiner) [1198110 1088334]     {CVE-2014-8171}
    - [fs] buffer: move allocation failure loop into the allocator (Johannes Weiner) [1198110 1088334]     {CVE-2014-8171}
    - [mm] memcg: handle non-error OOM situations more gracefully (Johannes Weiner) [1198110 1088334]     {CVE-2014-8171}
    - [mm] memcg: do not trap chargers with full callstack on OOM (Johannes Weiner) [1198110 1088334]     {CVE-2014-8171}
    - [mm] memcg: rework and document OOM waiting and wakeup (Johannes Weiner) [1198110 1088334]     {CVE-2014-8171}
    - [mm] memcg: enable memcg OOM killer only for user faults (Johannes Weiner) [1198110 1088334]     {CVE-2014-8171}
    - [x86] mm: finish user fault error path with fatal signal (Johannes Weiner) [1198110 1088334]     {CVE-2014-8171}
    - [mm] pass userspace fault flag to generic fault handler (Johannes Weiner) [1198110 1088334]     {CVE-2014-8171}
    - [s390] mm: do not invoke OOM killer on kernel fault OOM (Johannes Weiner) [1198110 1088334]     {CVE-2014-8171}
    - [powerpc] mm: remove obsolete init OOM protection (Johannes Weiner) [1198110 1088334] {CVE-2014-8171}
    - [powerpc] mm: invoke oom-killer from remaining unconverted page fault handlers (Johannes Weiner)     [1198110 1088334] {CVE-2014-8171}
    - [security] selinux: Permit bounded transitions under NO_NEW_PRIVS or NOSUID (Denys Vlasenko) [1104567     1104568] {CVE-2014-3215}
    - [security] Add PR_<GET, SET>_NO_NEW_PRIVS to prevent execve from granting privs (Denys Vlasenko)     [1104567 1104568] {CVE-2014-3215}

Tenable has extracted the preceding description block directly from the Oracle Linux security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

* A flaw was found in the way the Linux kernel's XFS file system handled replacing of remote attributes under certain conditions. A local user with access to XFS file system mount could potentially use this flaw to escalate their privileges on the system. (CVE-2015-0274, Important)

* It was found that the Linux kernel's KVM implementation did not ensure that the host CR4 control register value remained unchanged across VM entries on the same virtual CPU. A local, unprivileged user could use this flaw to cause denial of service on the system.
(CVE-2014-3690, Moderate)

* A flaw was found in the way Linux kernel's Transparent Huge Pages (THP) implementation handled non-huge page migration. A local, unprivileged user could use this flaw to crash the kernel by migrating transparent hugepages. (CVE-2014-3940, Moderate)

* An out-of-bounds memory access flaw was found in the syscall tracing functionality of the Linux kernel's perf subsystem. A local, unprivileged user could use this flaw to crash the system.
(CVE-2014-7825, Moderate)

* An out-of-bounds memory access flaw was found in the syscall tracing functionality of the Linux kernel's ftrace subsystem. On a system with ftrace syscall tracing enabled, a local, unprivileged user could use this flaw to crash the system, or escalate their privileges.
(CVE-2014-7826, Moderate)

* A race condition flaw was found in the Linux kernel's ext4 file system implementation that allowed a local, unprivileged user to crash the system by simultaneously writing to a file and toggling the O_DIRECT flag using fcntl(F_SETFL) on that file. (CVE-2014-8086, Moderate)

* A flaw was found in the way the Linux kernel's netfilter subsystem handled generic protocol tracking. As demonstrated in the Stream Control Transmission Protocol (SCTP) case, a remote attacker could use this flaw to bypass intended iptables rule restrictions when the associated connection tracking module was not loaded on the system.
(CVE-2014-8160, Moderate)

* It was found that due to excessive files_lock locking, a soft lockup could be triggered in the Linux kernel when performing asynchronous I/O operations. A local, unprivileged user could use this flaw to crash the system. (CVE-2014-8172, Moderate)

* A NULL pointer dereference flaw was found in the way the Linux kernel's madvise MADV_WILLNEED functionality handled page table locking. A local, unprivileged user could use this flaw to crash the system. (CVE-2014-8173, Moderate)

* An information leak flaw was found in the Linux kernel's IEEE 802.11 wireless networking implementation. When software encryption was used, a remote attacker could use this flaw to leak up to 8 bytes of plaintext. (CVE-2014-8709, Low)

* A stack-based buffer overflow flaw was found in the TechnoTrend/Hauppauge DEC USB device driver. A local user with write access to the corresponding device could use this flaw to crash the kernel or, potentially, elevate their privileges on the system.
(CVE-2014-8884, Low)

* Users of kernel modules may need to upgrade the module to maintain compatibility.

The system must be rebooted for this update to take effect.

Updated kernel packages that fix multiple security issues, address several hundred bugs, and add numerous enhancements are now available as part of the ongoing support and maintenance of Red Hat Enterprise Linux version 7. This is the first regular update.

Red Hat Product Security has rated this update as having Important security impact. Common Vulnerability Scoring System (CVSS) base scores, which give detailed severity ratings, are available for each vulnerability from the CVE links in the References section.

The kernel packages contain the Linux kernel, the core of any Linux operating system.

* A flaw was found in the way the Linux kernel's XFS file system handled replacing of remote attributes under certain conditions. A local user with access to XFS file system mount could potentially use this flaw to escalate their privileges on the system. (CVE-2015-0274, Important)

* It was found that the Linux kernel's KVM implementation did not ensure that the host CR4 control register value remained unchanged across VM entries on the same virtual CPU. A local, unprivileged user could use this flaw to cause denial of service on the system.
(CVE-2014-3690, Moderate)

* A flaw was found in the way Linux kernel's Transparent Huge Pages (THP) implementation handled non-huge page migration. A local, unprivileged user could use this flaw to crash the kernel by migrating transparent hugepages. (CVE-2014-3940, Moderate)

* An out-of-bounds memory access flaw was found in the syscall tracing functionality of the Linux kernel's perf subsystem. A local, unprivileged user could use this flaw to crash the system.
(CVE-2014-7825, Moderate)

* An out-of-bounds memory access flaw was found in the syscall tracing functionality of the Linux kernel's ftrace subsystem. On a system with ftrace syscall tracing enabled, a local, unprivileged user could use this flaw to crash the system, or escalate their privileges.
(CVE-2014-7826, Moderate)

* A race condition flaw was found in the Linux kernel's ext4 file system implementation that allowed a local, unprivileged user to crash the system by simultaneously writing to a file and toggling the O_DIRECT flag using fcntl(F_SETFL) on that file. (CVE-2014-8086, Moderate)

* A flaw was found in the way the Linux kernel's netfilter subsystem handled generic protocol tracking. As demonstrated in the Stream Control Transmission Protocol (SCTP) case, a remote attacker could use this flaw to bypass intended iptables rule restrictions when the associated connection tracking module was not loaded on the system.
(CVE-2014-8160, Moderate)

* It was found that due to excessive files_lock locking, a soft lockup could be triggered in the Linux kernel when performing asynchronous I/O operations. A local, unprivileged user could use this flaw to crash the system. (CVE-2014-8172, Moderate)

* A NULL pointer dereference flaw was found in the way the Linux kernel's madvise MADV_WILLNEED functionality handled page table locking. A local, unprivileged user could use this flaw to crash the system. (CVE-2014-8173, Moderate)

* An information leak flaw was found in the Linux kernel's IEEE 802.11 wireless networking implementation. When software encryption was used, a remote attacker could use this flaw to leak up to 8 bytes of plaintext. (CVE-2014-8709, Low)

* A stack-based buffer overflow flaw was found in the TechnoTrend/Hauppauge DEC USB device driver. A local user with write access to the corresponding device could use this flaw to crash the kernel or, potentially, elevate their privileges on the system.
(CVE-2014-8884, Low)

Red Hat would like to thank Eric Windisch of the Docker project for reporting CVE-2015-0274, Andy Lutomirski for reporting CVE-2014-3690, and Robert Święcki for reporting CVE-2014-7825 and CVE-2014-7826.

This update also fixes several hundred bugs and adds numerous enhancements. Refer to the Red Hat Enterprise Linux 7.1 Release Notes for information on the most significant of these changes, and the following Knowledgebase article for further information:
https://access.redhat.com/articles/1352803

All Red Hat Enterprise Linux 7 users are advised to install these updated packages, which correct these issues and add these enhancements. The system must be rebooted for this update to take effect.

The remote Oracle Linux 5 / 6 host has packages installed that are affected by multiple vulnerabilities as referenced in the ELSA-2015-3015 advisory.

    - netfilter: conntrack: disable generic tracking for known protocols (Florian Westphal)  [Orabug:
    20679631]  {CVE-2014-8160}
    - mac80211: fix fragmentation code, particularly for encryption (Johannes Berg)  [Orabug: 20673314]     {CVE-2014-8709}
    - tracing/syscalls: Ignore numbers outside NR_syscalls' range (Rabin Vincent)  [Orabug: 20673165]     {CVE-2014-7825} {CVE-2014-7826}

Tenable has extracted the preceding description block directly from the Oracle Linux security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Oracle Linux 5 / 6 host has packages installed that are affected by multiple vulnerabilities as referenced in the ELSA-2015-3014 advisory.

    - kvm: fix excessive pages un-pinning in kvm_iommu_map error path. (Quentin Casasnovas)  [Orabug:
    20687314]  {CVE-2014-3601} {CVE-2014-8369} {CVE-2014-3601}
    - Revert 'mm: Fix NULL pointer dereference in madvise(MADV_WILLNEED) support' (Guangyu Sun)  [Orabug:
    20673281]  {CVE-2014-8173}
    - netfilter: conntrack: disable generic tracking for known protocols (Florian Westphal)  [Orabug:
    20679630]  {CVE-2014-8160}
    - mac80211: fix fragmentation code, particularly for encryption (Johannes Berg)  [Orabug: 20673313]     {CVE-2014-8709}
    - mm: Fix NULL pointer dereference in madvise(MADV_WILLNEED) support (Kirill A. Shutemov)  [Orabug:
    20673282]  {CVE-2014-8173}
    - tracing/syscalls: Ignore numbers outside NR_syscalls' range (Rabin Vincent)  [Orabug: 20673164]     {CVE-2014-7825} {CVE-2014-7826}
    - tracing/syscalls: Fix perf syscall tracing when syscall_nr == -1 (Will Deacon)  [Orabug: 20673164]     {CVE-2014-7825} {CVE-2014-7826}

Tenable has extracted the preceding description block directly from the Oracle Linux security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Oracle Linux 6 / 7 host has packages installed that are affected by multiple vulnerabilities as referenced in the ELSA-2015-3013 advisory.

    - kvm: fix excessive pages un-pinning in kvm_iommu_map error path. (Quentin Casasnovas)  [Orabug:
    20687313]  {CVE-2014-3601} {CVE-2014-8369} {CVE-2014-3601}
    - ttusb-dec: buffer overflow in ioctl (Dan Carpenter)  [Orabug: 20673376]  {CVE-2014-8884}
    - mm: Fix NULL pointer dereference in madvise(MADV_WILLNEED) support (Kirill A. Shutemov)  [Orabug:
    20673281]  {CVE-2014-8173}
    - netfilter: conntrack: disable generic tracking for known protocols (Florian Westphal)  [Orabug:
    20673239]  {CVE-2014-8160}

Tenable has extracted the preceding description block directly from the Oracle Linux security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Oracle Linux 7 host has packages installed that are affected by multiple vulnerabilities as referenced in the ELSA-2015-0290 advisory.

  - arch/x86/kvm/vmx.c in the KVM subsystem in the Linux kernel before 3.17.2 on Intel processors does not     ensure that the value in the CR4 control register remains the same after a VM entry, which allows host OS     users to kill arbitrary processes or cause a denial of service (system disruption) by leveraging /dev/kvm     access, as demonstrated by PR_SET_TSC prctl calls within a modified copy of QEMU. (CVE-2014-3690)

  - The Linux kernel through 3.14.5 does not properly consider the presence of hugetlb entries, which allows     local users to cause a denial of service (memory corruption or system crash) by accessing certain memory     locations, as demonstrated by triggering a race condition via numa_maps read operations during hugepage     migration, related to fs/proc/task_mmu.c and mm/mempolicy.c. (CVE-2014-3940)

  - kernel/trace/trace_syscalls.c in the Linux kernel through 3.17.2 does not properly handle private syscall     numbers during use of the perf subsystem, which allows local users to cause a denial of service (out-of-     bounds read and OOPS) or bypass the ASLR protection mechanism via a crafted application. (CVE-2014-7825)

  - kernel/trace/trace_syscalls.c in the Linux kernel through 3.17.2 does not properly handle private syscall     numbers during use of the ftrace subsystem, which allows local users to gain privileges or cause a denial     of service (invalid pointer dereference) via a crafted application. (CVE-2014-7826)

  - Race condition in the ext4_file_write_iter function in fs/ext4/file.c in the Linux kernel through 3.17     allows local users to cause a denial of service (file unavailability) via a combination of a write action     and an F_SETFL fcntl operation for the O_DIRECT flag. (CVE-2014-8086)

  - net/netfilter/nf_conntrack_proto_generic.c in the Linux kernel before 3.18 generates incorrect conntrack     entries during handling of certain iptables rule sets for the SCTP, DCCP, GRE, and UDP-Lite protocols,     which allows remote attackers to bypass intended access restrictions via packets with disallowed port     numbers. (CVE-2014-8160)

  - The filesystem implementation in the Linux kernel before 3.13 performs certain operations on lists of     files with an inappropriate locking approach, which allows local users to cause a denial of service (soft     lockup or system crash) via unspecified use of Asynchronous I/O (AIO) operations. (CVE-2014-8172)

  - The pmd_none_or_trans_huge_or_clear_bad function in include/asm-generic/pgtable.h in the Linux kernel     before 3.13 on NUMA systems does not properly determine whether a Page Middle Directory (PMD) entry is a     transparent huge-table entry, which allows local users to cause a denial of service (NULL pointer     dereference and system crash) or possibly have unspecified other impact via a crafted MADV_WILLNEED     madvise system call that leverages the absence of a page-table lock. (CVE-2014-8173)

  - The ieee80211_fragment function in net/mac80211/tx.c in the Linux kernel before 3.13.5 does not properly     maintain a certain tail pointer, which allows remote attackers to obtain sensitive cleartext information     by reading packets. (CVE-2014-8709)

  - Stack-based buffer overflow in the ttusbdecfe_dvbs_diseqc_send_master_cmd function in     drivers/media/usb/ttusb-dec/ttusbdecfe.c in the Linux kernel before 3.17.4 allows local users to cause a     denial of service (system crash) or possibly gain privileges via a large message length in an ioctl call.
    (CVE-2014-8884)

  - The XFS implementation in the Linux kernel before 3.15 improperly uses an old size value during remote     attribute replacement, which allows local users to cause a denial of service (transaction overrun and data     corruption) or possibly gain privileges by leveraging XFS filesystem access. (CVE-2015-0274)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The remote Redhat Enterprise Linux 7 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2015:0290 advisory.

    The kernel packages contain the Linux kernel, the core of any Linux     operating system.

    * A flaw was found in the way the Linux kernel's XFS file system handled     replacing of remote attributes under certain conditions. A local user with     access to XFS file system mount could potentially use this flaw to escalate     their privileges on the system. (CVE-2015-0274, Important)

    * It was found that the Linux kernel's KVM implementation did not ensure     that the host CR4 control register value remained unchanged across VM     entries on the same virtual CPU. A local, unprivileged user could use this     flaw to cause denial of service on the system. (CVE-2014-3690, Moderate)

    * A flaw was found in the way Linux kernel's Transparent Huge Pages (THP)     implementation handled non-huge page migration. A local, unprivileged user     could use this flaw to crash the kernel by migrating transparent hugepages.
    (CVE-2014-3940, Moderate)

    * An out-of-bounds memory access flaw was found in the syscall tracing     functionality of the Linux kernel's perf subsystem. A local, unprivileged     user could use this flaw to crash the system. (CVE-2014-7825, Moderate)

    * An out-of-bounds memory access flaw was found in the syscall tracing     functionality of the Linux kernel's ftrace subsystem. On a system with     ftrace syscall tracing enabled, a local, unprivileged user could use this     flaw to crash the system, or escalate their privileges. (CVE-2014-7826,     Moderate)

    * A race condition flaw was found in the Linux kernel's ext4 file system     implementation that allowed a local, unprivileged user to crash the system     by simultaneously writing to a file and toggling the O_DIRECT flag using     fcntl(F_SETFL) on that file. (CVE-2014-8086, Moderate)

    * A flaw was found in the way the Linux kernel's netfilter subsystem     handled generic protocol tracking. As demonstrated in the Stream Control     Transmission Protocol (SCTP) case, a remote attacker could use this flaw to     bypass intended iptables rule restrictions when the associated connection     tracking module was not loaded on the system. (CVE-2014-8160, Moderate)

    * It was found that due to excessive files_lock locking, a soft lockup     could be triggered in the Linux kernel when performing asynchronous I/O     operations. A local, unprivileged user could use this flaw to crash the     system. (CVE-2014-8172, Moderate)

    * A NULL pointer dereference flaw was found in the way the Linux kernel's     madvise MADV_WILLNEED functionality handled page table locking. A local,     unprivileged user could use this flaw to crash the system. (CVE-2014-8173,     Moderate)

    * An information leak flaw was found in the Linux kernel's IEEE 802.11     wireless networking implementation. When software encryption was used, a     remote attacker could use this flaw to leak up to 8 bytes of plaintext.
    (CVE-2014-8709, Low)

    * A stack-based buffer overflow flaw was found in the TechnoTrend/Hauppauge     DEC USB device driver. A local user with write access to the corresponding     device could use this flaw to crash the kernel or, potentially, elevate     their privileges on the system. (CVE-2014-8884, Low)

    Red Hat would like to thank Eric Windisch of the Docker project for     reporting CVE-2015-0274, Andy Lutomirski for reporting CVE-2014-3690, and     Robert wicki for reporting CVE-2014-7825 and CVE-2014-7826.

    This update also fixes several hundred bugs and adds numerous enhancements.
    Refer to the Red Hat Enterprise Linux 7.1 Release Notes for information on     the most significant of these changes, and the following Knowledgebase     article for further information: https://access.redhat.com/articles/1352803

    All Red Hat Enterprise Linux 7 users are advised to install these updated     packages, which correct these issues and add these enhancements. The system     must be rebooted for this update to take effect.

Tenable has extracted the preceding description block directly from the Red Hat Enterprise Linux security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The 3.14.27 stable update contains a number of important fixes across the tree.\nThe 3.14.26 update contains a number of important fixes across the tree\nThe 3.14.25 stable update contains a number of important fixes across the tree.\nThe 3.14.24 stable update contains a number of important fixes across the tree.

Note that Tenable Network Security has extracted the preceding description block directly from the Fedora security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

USN-2448-1 fixed vulnerabilities in the Linux kernel. Due to an unrelated regression TCP Throughput drops to zero for several drivers after upgrading. This update fixes the problem.

We apologize for the inconvenience.

An information leak in the Linux kernel was discovered that could leak the high 16 bits of the kernel stack address on 32-bit Kernel Virtual Machine (KVM) paravirt guests. A user in the guest OS could exploit this leak to obtain information that could potentially be used to aid in attacking the kernel. (CVE-2014-8134)

Rabin Vincent, Robert Swiecki, Russell King discovered that the ftrace subsystem of the Linux kernel does not properly handle private syscall numbers. A local user could exploit this flaw to cause a denial of service (OOPS).
(CVE-2014-7826)

A flaw in the handling of malformed ASCONF chunks by SCTP (Stream Control Transmission Protocol) implementation in the Linux kernel was discovered. A remote attacker could exploit this flaw to cause a denial of service (system crash).
(CVE-2014-3673)

A flaw in the handling of duplicate ASCONF chunks by SCTP (Stream Control Transmission Protocol) implementation in the Linux kernel was discovered. A remote attacker could exploit this flaw to cause a denial of service (panic).
(CVE-2014-3687)

It was discovered that excessive queuing by SCTP (Stream Control Transmission Protocol) implementation in the Linux kernel can cause memory pressure. A remote attacker could exploit this flaw to cause a denial of service.
(CVE-2014-3688)

Rabin Vincent, Robert Swiecki, Russell Kinglaw discovered a flaw in how the perf subsystem of the Linux kernel handles private systecall numbers. A local user could exploit this to cause a denial of service (OOPS) or bypass ASLR protections via a crafted application. (CVE-2014-7825)

Andy Lutomirski discovered a flaw in how the Linux kernel handles pivot_root when used with a chroot directory. A local user could exploit this flaw to cause a denial of service (mount-tree loop). (CVE-2014-7970)

Dmitry Monakhov discovered a race condition in the ext4_file_write_iter function of the Linux kernel's ext4 filesystem. A local user could exploit this flaw to cause a denial of service (file unavailability). (CVE-2014-8086)

The KVM (kernel virtual machine) subsystem of the Linux kernel miscalculates the number of memory pages during the handling of a mapping failure. A guest OS user could exploit this to cause a denial of service (host OS page unpinning) or possibly have unspecified other impact by leveraging guest OS privileges. (CVE-2014-8369)

Andy Lutomirski discovered that the Linux kernel does not properly handle faults associated with the Stack Segment (SS) register on the x86 architecture. A local attacker could exploit this flaw to cause a denial of service (panic). (CVE-2014-9090).

Note that Tenable Network Security has extracted the preceding description block directly from the Ubuntu security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

An information leak in the Linux kernel was discovered that could leak the high 16 bits of the kernel stack address on 32-bit Kernel Virtual Machine (KVM) paravirt guests. A user in the guest OS could exploit this leak to obtain information that could potentially be used to aid in attacking the kernel. (CVE-2014-8134)

Rabin Vincent, Robert Swiecki, Russell King discovered that the ftrace subsystem of the Linux kernel does not properly handle private syscall numbers. A local user could exploit this flaw to cause a denial of service (OOPS). (CVE-2014-7826)

A flaw in the handling of malformed ASCONF chunks by SCTP (Stream Control Transmission Protocol) implementation in the Linux kernel was discovered. A remote attacker could exploit this flaw to cause a denial of service (system crash). (CVE-2014-3673)

A flaw in the handling of duplicate ASCONF chunks by SCTP (Stream Control Transmission Protocol) implementation in the Linux kernel was discovered. A remote attacker could exploit this flaw to cause a denial of service (panic). (CVE-2014-3687)

It was discovered that excessive queuing by SCTP (Stream Control Transmission Protocol) implementation in the Linux kernel can cause memory pressure. A remote attacker could exploit this flaw to cause a denial of service. (CVE-2014-3688)

Rabin Vincent, Robert Swiecki, Russell Kinglaw discovered a flaw in how the perf subsystem of the Linux kernel handles private systecall numbers. A local user could exploit this to cause a denial of service (OOPS) or bypass ASLR protections via a crafted application.
(CVE-2014-7825)

Andy Lutomirski discovered a flaw in how the Linux kernel handles pivot_root when used with a chroot directory. A local user could exploit this flaw to cause a denial of service (mount-tree loop).
(CVE-2014-7970)

Dmitry Monakhov discovered a race condition in the ext4_file_write_iter function of the Linux kernel's ext4 filesystem. A local user could exploit this flaw to cause a denial of service (file unavailability). (CVE-2014-8086)

The KVM (kernel virtual machine) subsystem of the Linux kernel miscalculates the number of memory pages during the handling of a mapping failure. A guest OS user could exploit this to cause a denial of service (host OS page unpinning) or possibly have unspecified other impact by leveraging guest OS privileges. (CVE-2014-8369)

Andy Lutomirski discovered that the Linux kernel does not properly handle faults associated with the Stack Segment (SS) register on the x86 architecture. A local attacker could exploit this flaw to cause a denial of service (panic). (CVE-2014-9090).

Note that Tenable Network Security has extracted the preceding description block directly from the Ubuntu security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

The remote Ubuntu 14.04 LTS host has a package installed that is affected by multiple vulnerabilities as referenced in the USN-2447-1 advisory.

    Andy Lutomirski discovered that the Linux kernel does not properly handle faults associated with the Stack     Segment (SS) register in the x86 architecture. A local attacker could exploit this flaw to gain     administrative privileges. (CVE-2014-9322)

    An information leak in the Linux kernel was discovered that could leak the high 16 bits of the kernel     stack address on 32-bit Kernel Virtual Machine (KVM) paravirt guests. A user in the guest OS could exploit     this leak to obtain information that could potentially be used to aid in attacking the kernel.
    (CVE-2014-8134)

    Rabin Vincent, Robert Swiecki, Russell King discovered that the ftrace subsystem of the Linux kernel does     not properly handle private syscall numbers. A local user could exploit this flaw to cause a denial of     service (OOPS). (CVE-2014-7826)

    A flaw in the handling of malformed ASCONF chunks by SCTP (Stream Control Transmission Protocol)     implementation in the Linux kernel was discovered. A remote attacker could exploit this flaw to cause a     denial of service (system crash). (CVE-2014-3673)

    A flaw in the handling of duplicate ASCONF chunks by SCTP (Stream Control Transmission Protocol)     implementation in the Linux kernel was discovered. A remote attacker could exploit this flaw to cause a     denial of service (panic). (CVE-2014-3687)

    It was discovered that excessive queuing by SCTP (Stream Control Transmission Protocol) implementation in     the Linux kernel can cause memory pressure. A remote attacker could exploit this flaw to cause a denial of     service. (CVE-2014-3688)

    Rabin Vincent, Robert Swiecki, Russell Kinglaw discovered a flaw in how the perf subsystem of the Linux     kernel handles private systecall numbers. A local user could exploit this to cause a denial of service     (OOPS) or bypass ASLR protections via a crafted application. (CVE-2014-7825)

    Andy Lutomirski discovered a flaw in how the Linux kernel handles pivot_root when used with a chroot     directory. A local user could exploit this flaw to cause a denial of service (mount-tree loop).
    (CVE-2014-7970)

    Dmitry Monakhov discovered a race condition in the ext4_file_write_iter function of the Linux kernel's     ext4 filesystem. A local user could exploit this flaw to cause a denial of service (file unavailability).
    (CVE-2014-8086)

    The KVM (kernel virtual machine) subsystem of the Linux kernel miscalculates the number of memory pages     during the handling of a mapping failure. A guest OS user could exploit this to cause a denial of service     (host OS page unpinning) or possibly have unspecified other impact by leveraging guest OS privileges.
    (CVE-2014-8369)

    Andy Lutomirski discovered that the Linux kernel does not properly handle faults associated with the Stack     Segment (SS) register on the x86 architecture. A local attacker could exploit this flaw to cause a denial     of service (panic). (CVE-2014-9090)

Tenable has extracted the preceding description block directly from the Ubuntu security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Ubuntu 14.04 LTS host has a package installed that is affected by multiple vulnerabilities as referenced in the USN-2446-1 advisory.

    Andy Lutomirski discovered that the Linux kernel does not properly handle faults associated with the Stack     Segment (SS) register in the x86 architecture. A local attacker could exploit this flaw to gain     administrative privileges. (CVE-2014-9322)

    An information leak in the Linux kernel was discovered that could leak the high 16 bits of the kernel     stack address on 32-bit Kernel Virtual Machine (KVM) paravirt guests. A user in the guest OS could exploit     this leak to obtain information that could potentially be used to aid in attacking the kernel.
    (CVE-2014-8134)

    Rabin Vincent, Robert Swiecki, Russell King discovered that the ftrace subsystem of the Linux kernel does     not properly handle private syscall numbers. A local user could exploit this flaw to cause a denial of     service (OOPS). (CVE-2014-7826)

    A flaw in the handling of malformed ASCONF chunks by SCTP (Stream Control Transmission Protocol)     implementation in the Linux kernel was discovered. A remote attacker could exploit this flaw to cause a     denial of service (system crash). (CVE-2014-3673)

    A flaw in the handling of duplicate ASCONF chunks by SCTP (Stream Control Transmission Protocol)     implementation in the Linux kernel was discovered. A remote attacker could exploit this flaw to cause a     denial of service (panic). (CVE-2014-3687)

    It was discovered that excessive queuing by SCTP (Stream Control Transmission Protocol) implementation in     the Linux kernel can cause memory pressure. A remote attacker could exploit this flaw to cause a denial of     service. (CVE-2014-3688)

    Rabin Vincent, Robert Swiecki, Russell Kinglaw discovered a flaw in how the perf subsystem of the Linux     kernel handles private systecall numbers. A local user could exploit this to cause a denial of service     (OOPS) or bypass ASLR protections via a crafted application. (CVE-2014-7825)

    The KVM (kernel virtual machine) subsystem of the Linux kernel miscalculates the number of memory pages     during the handling of a mapping failure. A guest OS user could exploit this to cause a denial of service     (host OS page unpinning) or possibly have unspecified other impact by leveraging guest OS privileges.
    (CVE-2014-8369)

    Andy Lutomirski discovered that the Linux kernel does not properly handle faults associated with the Stack     Segment (SS) register on the x86 architecture. A local attacker could exploit this flaw to cause a denial     of service (panic). (CVE-2014-9090)

Tenable has extracted the preceding description block directly from the Ubuntu security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

An information leak in the Linux kernel was discovered that could leak the high 16 bits of the kernel stack address on 32-bit Kernel Virtual Machine (KVM) paravirt guests. A user in the guest OS could exploit this leak to obtain information that could potentially be used to aid in attacking the kernel. (CVE-2014-8134)

Rabin Vincent, Robert Swiecki, Russell King discovered that the ftrace subsystem of the Linux kernel does not properly handle private syscall numbers. A local user could exploit this flaw to cause a denial of service (OOPS). (CVE-2014-7826)

A flaw in the handling of malformed ASCONF chunks by SCTP (Stream Control Transmission Protocol) implementation in the Linux kernel was discovered. A remote attacker could exploit this flaw to cause a denial of service (system crash). (CVE-2014-3673)

A flaw in the handling of duplicate ASCONF chunks by SCTP (Stream Control Transmission Protocol) implementation in the Linux kernel was discovered. A remote attacker could exploit this flaw to cause a denial of service (panic). (CVE-2014-3687)

It was discovered that excessive queuing by SCTP (Stream Control Transmission Protocol) implementation in the Linux kernel can cause memory pressure. A remote attacker could exploit this flaw to cause a denial of service. (CVE-2014-3688)

Rabin Vincent, Robert Swiecki, Russell Kinglaw discovered a flaw in how the perf subsystem of the Linux kernel handles private systecall numbers. A local user could exploit this to cause a denial of service (OOPS) or bypass ASLR protections via a crafted application.
(CVE-2014-7825)

The KVM (kernel virtual machine) subsystem of the Linux kernel miscalculates the number of memory pages during the handling of a mapping failure. A guest OS user could exploit this to cause a denial of service (host OS page unpinning) or possibly have unspecified other impact by leveraging guest OS privileges. (CVE-2014-8369)

Andy Lutomirski discovered that the Linux kernel does not properly handle faults associated with the Stack Segment (SS) register on the x86 architecture. A local attacker could exploit this flaw to cause a denial of service (panic). (CVE-2014-9090).

Note that Tenable Network Security has extracted the preceding description block directly from the Ubuntu security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

An information leak in the Linux kernel was discovered that could leak the high 16 bits of the kernel stack address on 32-bit Kernel Virtual Machine (KVM) paravirt guests. A user in the guest OS could exploit this leak to obtain information that could potentially be used to aid in attacking the kernel. (CVE-2014-8134)

Rabin Vincent, Robert Swiecki, Russell King discovered that the ftrace subsystem of the Linux kernel does not properly handle private syscall numbers. A local user could exploit this flaw to cause a denial of service (OOPS). (CVE-2014-7826)

Rabin Vincent, Robert Swiecki, Russell Kinglaw discovered a flaw in how the perf subsystem of the Linux kernel handles private systecall numbers. A local user could exploit this to cause a denial of service (OOPS) or bypass ASLR protections via a crafted application.
(CVE-2014-7825)

A NULL pointer dereference flaw was discovered in the the Linux kernel's SCTP implementation when ASCONF is used. A remote attacker could exploit this flaw to cause a denial of service (system crash) via a malformed INIT chunk. (CVE-2014-7841)

A stack buffer overflow was discovered in the ioctl command handling for the Technotrend/Hauppauge USB DEC devices driver. A local user could exploit this flaw to cause a denial of service (system crash) or possibly gain privileges. (CVE-2014-8884)

Andy Lutomirski discovered that the Linux kernel does not properly handle faults associated with the Stack Segment (SS) register on the x86 architecture. A local attacker could exploit this flaw to cause a denial of service (panic). (CVE-2014-9090).

Note that Tenable Network Security has extracted the preceding description block directly from the Ubuntu security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

Updated kernel-rt packages that fix three security issues, several bugs, and add various enhancements are now available for Red Hat Enterprise MRG 2.5.

Red Hat Product Security has rated this update as having Moderate security impact. Common Vulnerability Scoring System (CVSS) base scores, which give detailed severity ratings, are available for each vulnerability from the CVE links in the References section.

The kernel-rt packages contain the Linux kernel, the core of any Linux operating system.

  * A denial of service flaw was found in the way the Linux     kernel's XFS file system implementation ordered     directory hashes under certain conditions. A local     attacker could use this flaw to corrupt the file system     by creating directories with colliding hash values,     potentially resulting in a system crash. (CVE-2014-7283,     Moderate)

  * An out-of-bounds memory access flaw was found in the     syscall tracing functionality of the Linux kernel's perf     subsystem. A local, unprivileged user could use this     flaw to crash the system. (CVE-2014-7825, Moderate)

  * An out-of-bounds memory access flaw was found in the     syscall tracing functionality of the Linux kernel's     ftrace subsystem. On a system with ftrace syscall     tracing enabled, a local, unprivileged user could use     this flaw to crash the system, or escalate their     privileges. (CVE-2014-7826, Moderate)

The kernel-rt packages have been upgraded to upstream version 3.10.58, which provides a number of bug fixes and enhancements over the previous version. (BZ#1158105)

This update also fixes the following bugs :

  * Automatic NUMA balancing on a low priority thread could     cause memory contention with a high priority thread     running in the same process. This contention could     trigger poor real time performance on the system. In     order to avoid this potential memory contention, the MRG     Realtime kernel now disables     NUMA_BALANCING_DEFAULT_ENABLED. (BZ#1158940)

  * When tracing a bug, WARN*() functions could flood the     ring buffer making the trace useless or even overflowing     the ring buffer. To address this issue, a     traceoff_on_warning option was added to the kernel     command line and as a sysctl option. This option     disables the writing of the warning messages to the ring     buffer, which results in a cleaner trace for debugging.
    (BZ#1155200)

In addition, this update adds the following enhancement :

  * Support for XHCI (USB 3) is now enabled in the MRG     Realtime kernel. (BZ#1134095)

All kernel-rt users are advised to upgrade to these updated packages, which contain correct these issues and add these enhancements. The system must be rebooted for this update to take effect.

Multiple vulnerabilities has been found and corrected in the Linux kernel :

The WRMSR processing functionality in the KVM subsystem in the Linux kernel through 3.17.2 does not properly handle the writing of a non-canonical address to a model-specific register, which allows guest OS users to cause a denial of service (host OS crash) by leveraging guest OS privileges, related to the wrmsr_interception function in arch/x86/kvm/svm.c and the handle_wrmsr function in arch/x86/kvm/vmx.c (CVE-2014-3610).

Race condition in the __kvm_migrate_pit_timer function in arch/x86/kvm/i8254.c in the KVM subsystem in the Linux kernel through 3.17.2 allows guest OS users to cause a denial of service (host OS crash) by leveraging incorrect PIT emulation (CVE-2014-3611).

arch/x86/kvm/vmx.c in the KVM subsystem in the Linux kernel before 3.12 does not have an exit handler for the INVEPT instruction, which allows guest OS users to cause a denial of service (guest OS crash) via a crafted application (CVE-2014-3645).

arch/x86/kvm/vmx.c in the KVM subsystem in the Linux kernel through 3.17.2 does not have an exit handler for the INVVPID instruction, which allows guest OS users to cause a denial of service (guest OS crash) via a crafted application (CVE-2014-3646).

arch/x86/kvm/emulate.c in the KVM subsystem in the Linux kernel through 3.17.2 does not properly perform RIP changes, which allows guest OS users to cause a denial of service (guest OS crash) via a crafted application (CVE-2014-3647).

The SCTP implementation in the Linux kernel through 3.17.2 allows remote attackers to cause a denial of service (system crash) via a malformed ASCONF chunk, related to net/sctp/sm_make_chunk.c and net/sctp/sm_statefuns.c (CVE-2014-3673).

The sctp_assoc_lookup_asconf_ack function in net/sctp/associola.c in the SCTP implementation in the Linux kernel through 3.17.2 allows remote attackers to cause a denial of service (panic) via duplicate ASCONF chunks that trigger an incorrect uncork within the side-effect interpreter (CVE-2014-3687).

arch/x86/kvm/vmx.c in the KVM subsystem in the Linux kernel before 3.17.2 on Intel processors does not ensure that the value in the CR4 control register remains the same after a VM entry, which allows host OS users to kill arbitrary processes or cause a denial of service (system disruption) by leveraging /dev/kvm access, as demonstrated by PR_SET_TSC prctl calls within a modified copy of QEMU (CVE-2014-3690).

kernel/trace/trace_syscalls.c in the Linux kernel through 3.17.2 does not properly handle private syscall numbers during use of the perf subsystem, which allows local users to cause a denial of service (out-of-bounds read and OOPS) or bypass the ASLR protection mechanism via a crafted application (CVE-2014-7825).

kernel/trace/trace_syscalls.c in the Linux kernel through 3.17.2 does not properly handle private syscall numbers during use of the ftrace subsystem, which allows local users to gain privileges or cause a denial of service (invalid pointer dereference) via a crafted application (CVE-2014-7826).

The pivot_root implementation in fs/namespace.c in the Linux kernel through 3.17 does not properly interact with certain locations of a chroot directory, which allows local users to cause a denial of service (mount-tree loop) via . (dot) values in both arguments to the pivot_root system call (CVE-2014-7970).

The kvm_iommu_map_pages function in virt/kvm/iommu.c in the Linux kernel through 3.17.2 miscalculates the number of pages during the handling of a mapping failure, which allows guest OS users to cause a denial of service (host OS page unpinning) or possibly have unspecified other impact by leveraging guest OS privileges. NOTE: this vulnerability exists because of an incorrect fix for CVE-2014-3601 (CVE-2014-8369).

The updated packages provides a solution for these security issues.

The 3.17.3 stable update contains a number of important fixes across the tree.

Note that Tenable Network Security has extracted the preceding description block directly from the Fedora security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

Latest upstream stable release, Linux v3.17.3. A wide variety of fixes across the tree.

Note that Tenable Network Security has extracted the preceding description block directly from the Fedora security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

ID	Name	Product	Family	Severity
124974	EulerOS Virtualization for ARM 64 3.0.1.0 : kernel (EulerOS-SA-2019-1521)	Nessus	Huawei Local Security Checks	critical
124805	EulerOS Virtualization 3.0.1.0 : kernel (EulerOS-SA-2019-1481)	Nessus	Huawei Local Security Checks	high
82999	CentOS 6 : kernel (CESA-2015:0864)	Nessus	CentOS Local Security Checks	high
82988	Scientific Linux Security Update : kernel on SL6.x i386/x86_64 (20150421)	Nessus	Scientific Linux Local Security Checks	high
82985	RHEL 6 : kernel (RHSA-2015:0864)	Nessus	Red Hat Local Security Checks	high
82981	Oracle Linux 6 : kernel (ELSA-2015-0864)	Nessus	Oracle Linux Local Security Checks	high
82254	Scientific Linux Security Update : kernel on SL7.x x86_64 (20150305)	Nessus	Scientific Linux Local Security Checks	high
81885	CentOS 7 : kernel (CESA-2015:0290)	Nessus	CentOS Local Security Checks	high
81873	Oracle Linux 5 / 6 : Unbreakable Enterprise kernel (ELSA-2015-3015)	Nessus	Oracle Linux Local Security Checks	high
81872	Oracle Linux 5 / 6 : Unbreakable Enterprise kernel (ELSA-2015-3014)	Nessus	Oracle Linux Local Security Checks	high
81871	Oracle Linux 6 / 7 : Unbreakable Enterprise kernel (ELSA-2015-3013)	Nessus	Oracle Linux Local Security Checks	high
81800	Oracle Linux 7 : kernel (ELSA-2015-0290)	Nessus	Oracle Linux Local Security Checks	high
81626	RHEL 7 : kernel (RHSA-2015:0290)	Nessus	Red Hat Local Security Checks	high
80376	Fedora 19 : kernel-3.14.27-100.fc19 (2014-17244)	Nessus	Fedora Local Security Checks	medium
80168	Ubuntu 14.10 : linux regression (USN-2448-2)	Nessus	Ubuntu Local Security Checks	high
80034	Ubuntu 14.10 : linux vulnerabilities (USN-2448-1)	Nessus	Ubuntu Local Security Checks	high
80033	Ubuntu 14.04 LTS : Linux kernel (Utopic HWE) vulnerabilities (USN-2447-1)	Nessus	Ubuntu Local Security Checks	high
80032	Ubuntu 14.04 LTS : Linux kernel vulnerabilities (USN-2446-1)	Nessus	Ubuntu Local Security Checks	high
80031	Ubuntu 12.04 LTS : linux-lts-trusty vulnerabilities (USN-2445-1)	Nessus	Ubuntu Local Security Checks	high
80030	Ubuntu 12.04 LTS : linux vulnerabilities (USN-2443-1)	Nessus	Ubuntu Local Security Checks	high
79684	RHEL 6 : kernel-rt (RHSA-2014:1943)	Nessus	Red Hat Local Security Checks	medium
79610	Mandriva Linux Security Advisory : kernel (MDVSA-2014:230)	Nessus	Mandriva Local Security Checks	high
79363	Fedora 20 : kernel-3.17.3-200.fc20 (2014-15200)	Nessus	Fedora Local Security Checks	medium
79319	Fedora 21 : kernel-3.17.3-300.fc21 (2014-15159)	Nessus	Fedora Local Security Checks	medium

Detections

Analytics

CVE-2014-7825

high

Tenable Plugins

critical

high

high

high

high

high

high

high

high

high

high

high

high

medium

high

high

high

high

high

high

medium

high

medium

medium