The net_ctl_permissions function in net/sysctl_net.c in the Linux kernel before 3.11.5 does not properly determine uid and gid values, which allows local users to bypass intended /proc/sys/net restrictions via a crafted application.

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - The net_ctl_permissions function in net/sysctl_net.c in the Linux kernel before 3.11.5 does not properly     determine uid and gid values, which allows local users to bypass intended /proc/sys/net restrictions via a     crafted application. (CVE-2013-4270)

Note that Nessus relies on the presence of the package as reported by the vendor.

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 :

  - In the ea_get function in fs/jfs/xattr.c in the Linux     kernel through 4.17.1, a memory corruption bug in JFS     can be triggered by calling setxattr twice with two     different extended attribute names on the same file.
    This vulnerability can be triggered by an unprivileged     user with the ability to create files and execute     programs. A kmalloc call is incorrect, leading to     slab-out-of-bounds in jfs_xattr.(CVE-2018-12233i1/4%0

  - The spectre_v2_select_mitigation function in     arch/x86/kernel/cpu/bugs.c in the Linux kernel before     4.18.1 does not always fill RSB upon a context switch,     which makes it easier for attackers to conduct     userspace-userspace spectreRSB     attacks.(CVE-2018-15572i1/4%0

  - Race condition in the queue_delete function in     sound/core/seq/seq_queue.c in the Linux kernel before     4.4.1 allows local users to cause a denial of service     (use-after-free and system crash) by making an ioctl     call at a certain time.(CVE-2016-2544i1/4%0

  - A flaw was found in the Linux kernel's implementation     of BPF in which systems can application can overflow a     32 bit refcount in both program and map refcount. This     refcount can wrap and end up a user after     free.(CVE-2016-4558i1/4%0

  - Interpretation conflict in     drivers/md/dm-snap-persistent.c in the Linux kernel     through 3.11.6 allows remote authenticated users to     obtain sensitive information or modify data via a     crafted mapping to a snapshot block     device.(CVE-2013-4299i1/4%0

  - The imon_probe function in drivers/media/rc/imon.c in     the Linux kernel through 4.13.11 allows local users to     cause a denial of service (NULL pointer dereference and     system crash) or possibly have unspecified other impact     via a crafted USB device.(CVE-2017-16537i1/4%0

  - A vulnerability in the handling of Transactional Memory     on powerpc systems was found. An unprivileged local     user can crash the kernel by starting a transaction,     suspending it, and then calling any of the exec() class     system calls.(CVE-2016-5828i1/4%0

  - A cross-boundary flaw was discovered in the Linux     kernel software raid driver. The driver accessed a     disabled bitmap where only the first byte of the buffer     was initialized to zero. This meant that the rest of     the request (up to 4095 bytes) was left and copied into     user space. An attacker could use this flaw to read     private information from user space that would not     otherwise have been accessible.(CVE-2015-5697i1/4%0

  - The parse_hid_report_descriptor function in     drivers/input/tablet/gtco.c in the Linux kernel before     4.13.11 allows local users to cause a denial of service     (out-of-bounds read and system crash) or possibly have     unspecified other impact via a crafted USB     device.(CVE-2017-16643i1/4%0

  - Race condition in the sclp_ctl_ioctl_sccb function in     drivers/s390/char/sclp_ctl.c in the Linux kernel before     4.6 allows local users to obtain sensitive information     from kernel memory by changing a certain length value,     aka a 'double fetch' vulnerability.(CVE-2016-6130i1/4%0

  - drivers/net/usb/asix_devices.c in the Linux kernel     through 4.13.11 allows local users to cause a denial of     service (NULL pointer dereference and system crash) or     possibly have unspecified other impact via a crafted     USB device.(CVE-2017-16647i1/4%0

  - A flaw was found in the Linux kernel which could cause     a kernel panic when restoring machine specific     registers on the PowerPC platform. Incorrect     transactional memory state registers could     inadvertently change the call path on return from     userspace and cause the kernel to enter an unknown     state and crash.(CVE-2015-8845i1/4%0

  - fs/namespace.c in the Linux kernel through 3.16.1 does     not properly restrict clearing MNT_NODEV, MNT_NOSUID,     and MNT_NOEXEC and changing MNT_ATIME_MASK during a     remount of a bind mount, which allows local users to     gain privileges, interfere with backups and auditing on     systems that had atime enabled, or cause a denial of     service (excessive filesystem updating) on systems that     had atime disabled via a 'mount -o remount' command     within a user namespace.(CVE-2014-5207i1/4%0

  - The NFS2/3 RPC client could send long arguments to the     NFS server. These encoded arguments are stored in an     array of memory pages, and accessed using pointer     variables. Arbitrarily long arguments could make these     pointers point outside the array and cause an     out-of-bounds memory access. A remote user or program     could use this flaw to crash the kernel, resulting in     denial of service.(CVE-2017-7645i1/4%0

  - The time subsystem in the Linux kernel, when     CONFIG_TIMER_STATS is enabled, allows local users to     discover real PID values (as distinguished from PID     values inside a PID namespace) by reading the     /proc/timer_list file, related to the print_timer     function in kernel/time/timer_list.c and the
    __timer_stats_timer_set_start_info function in     kernel/time/timer.c.(CVE-2017-5967i1/4%0

  - A vulnerability was found in the Linux kernel where the     keyctl_set_reqkey_keyring() function leaks the thread     keyring. This allows an unprivileged local user to     exhaust kernel memory and thus cause a     DoS.(CVE-2017-7472i1/4%0

  - A flaw was found that can be triggered in     keyring_search_iterator in keyring.c if type-i1/4zmatch     is NULL. A local user could use this flaw to crash the     system or, potentially, escalate their     privileges.(CVE-2017-2647i1/4%0

  - The make_response function in     drivers/block/xen-blkback/blkback.c in the Linux kernel     before 4.11.8 allows guest OS users to obtain sensitive     information from host OS (or other guest OS) kernel     memory by leveraging the copying of uninitialized     padding fields in Xen block-interface response     structures, aka XSA-216.(CVE-2017-10911i1/4%0

  - Stack-based buffer overflow in the SET_WPS_IE IOCTL     implementation in wlan_hdd_hostapd.c in the WLAN (aka     Wi-Fi) driver for the Linux kernel 3.x and 4.x, as used     in Qualcomm Innovation Center (QuIC) Android     contributions for MSM devices and other products,     allows attackers to gain privileges via a crafted     application that uses a long WPS IE     element.(CVE-2015-0570i1/4%0

  - The net_ctl_permissions function in net/sysctl_net.c in     the Linux kernel before 3.11.5 does not properly     determine uid and gid values, which allows local users     to bypass intended /proc/sys/net restrictions via a     crafted application.(CVE-2013-4270i1/4%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 :

  - net/ceph/auth_none.c in the Linux kernel through 3.10     allows remote attackers to cause a denial of service     (NULL pointer dereference and system crash) or possibly     have unspecified other impact via an auth_reply message     that triggers an attempted build_request     operation.(CVE-2013-1059)

  - The dispatch_discard_io function in     drivers/block/xen-blkback/blkback.c in the Xen blkback     implementation in the Linux kernel before 3.10.5 allows     guest OS users to cause a denial of service (data loss)     via filesystem write operations on a read-only disk     that supports the (1) BLKIF_OP_DISCARD (aka discard or     TRIM) or (2) SCSI UNMAP feature.(CVE-2013-2140)

  - The mmc_ioctl_cdrom_read_data function in     drivers/cdrom/cdrom.c in the Linux kernel through 3.10     allows local users to obtain sensitive information from     kernel memory via a read operation on a malfunctioning     CD-ROM drive.(CVE-2013-2164)

  - Multiple array index errors in drivers/hid/hid-core.c     in the Human Interface Device (HID) subsystem in the     Linux kernel through 3.11 allow physically proximate     attackers to execute arbitrary code or cause a denial     of service (heap memory corruption) via a crafted     device that provides an invalid Report     ID.(CVE-2013-2888)

  - drivers/hid/hid-zpff.c in the Human Interface Device     (HID) subsystem in the Linux kernel through 3.11, when     CONFIG_HID_ZEROPLUS is enabled, allows physically     proximate attackers to cause a denial of service     (heap-based out-of-bounds write) via a crafted     device.(CVE-2013-2889)

  - drivers/hid/hid-pl.c in the Human Interface Device     (HID) subsystem in the Linux kernel through 3.11, when     CONFIG_HID_PANTHERLORD is enabled, allows physically     proximate attackers to cause a denial of service     (heap-based out-of-bounds write) via a crafted     device.(CVE-2013-2892)

  - A flaw was found in the way the get_dumpable() function     return value was interpreted in the ptrace subsystem of     the Linux kernel. When 'fs.suid_dumpable' was set to 2,     a local, unprivileged local user could use this flaw to     bypass intended ptrace restrictions and obtain     potentially sensitive information.(CVE-2013-2929)

  - The perf_trace_event_perm function in     kernel/trace/trace_event_perf.c in the Linux kernel     before 3.12.2 does not properly restrict access to the     perf subsystem, which allows local users to enable     function tracing via a crafted     application.(CVE-2013-2930)

  - The fib6_add_rt2node function in net/ipv6/ip6_fib.c in     the IPv6 stack in the Linux kernel through 3.10.1 does     not properly handle Router Advertisement (RA) messages     in certain circumstances involving three routes that     initially qualified for membership in an ECMP route set     until a change occurred for one of the first two     routes, which allows remote attackers to cause a denial     of service (system crash) via a crafted sequence of     messages.(CVE-2013-4125)

  - Use-after-free vulnerability in the     vhost_net_set_backend function in drivers/vhost/net.c     in the Linux kernel through 3.10.3 allows local users     to cause a denial of service (OOPS and system crash)     via vectors involving powering on a virtual     machine.(CVE-2013-4127)

  - The udp_v6_push_pending_frames function in     net/ipv6/udp.c in the IPv6 implementation in the Linux     kernel through 3.10.3 makes an incorrect function call     for pending data, which allows local users to cause a     denial of service (BUG and system crash) via a crafted     application that uses the UDP_CORK option in a     setsockopt system call.(CVE-2013-4162)

  - The ip6_append_data_mtu function in     net/ipv6/ip6_output.c in the IPv6 implementation in the     Linux kernel through 3.10.3 does not properly maintain     information about whether the IPV6_MTU setsockopt     option had been specified, which allows local users to     cause a denial of service (BUG and system crash) via a     crafted application that uses the UDP_CORK option in a     setsockopt system call.(CVE-2013-4163)

  - Memory leak in the unshare_userns function in     kernel/user_namespace.c in the Linux kernel before     3.10.6 allows local users to cause a denial of service     (memory consumption) via an invalid CLONE_NEWUSER     unshare call.(CVE-2013-4205)

  - Off-by-one error in the build_unc_path_to_root function     in fs/cifs/connect.c in the Linux kernel before 3.9.6     allows remote attackers to cause a denial of service     (memory corruption and system crash) via a DFS share     mount operation that triggers use of an unexpected DFS     referral name length.(CVE-2013-4247)

  - The net_ctl_permissions function in net/sysctl_net.c in     the Linux kernel before 3.11.5 does not properly     determine uid and gid values, which allows local users     to bypass intended /proc/sys/net restrictions via a     crafted application.(CVE-2013-4270)

  - Interpretation conflict in     drivers/md/dm-snap-persistent.c in the Linux kernel     through 3.11.6 allows remote authenticated users to     obtain sensitive information or modify data via a     crafted mapping to a snapshot block     device.(CVE-2013-4299)

  - The scm_check_creds function in net/core/scm.c in the     Linux kernel before 3.11 performs a capability check in     an incorrect namespace, which allows local users to     gain privileges via PID spoofing.(CVE-2013-4300)

  - It was found that the Linux kernel did not properly     account file descriptors passed over the unix socket     against the process limit. A local user could use this     flaw to exhaust all available memory on the     system.(CVE-2013-4312)

  - Use-after-free vulnerability in drivers/net/tun.c in     the Linux kernel through 3.11.1 allows local users to     gain privileges by leveraging the CAP_NET_ADMIN     capability and providing an invalid tuntap interface     name in a TUNSETIFF ioctl call.(CVE-2013-4343)

  - Off-by-one error in the get_prng_bytes function in     crypto/ansi_cprng.c in the Linux kernel through 3.11.4     makes it easier for context-dependent attackers to     defeat cryptographic protection mechanisms via multiple     requests for small amounts of data, leading to improper     management of the state of the consumed     data.(CVE-2013-4345)

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-rt packages that fix multiple security issues and several bugs are now available for Red Hat Enterprise MRG 2.4.

The Red Hat Security Response Team 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-rt packages contain the Linux kernel, the core of any Linux operating system.

* A flaw was found in the way the Linux kernel's TCP/IP protocol suite implementation handled sending of certain UDP packets over sockets that used the UDP_CORK option when the UDP Fragmentation Offload (UFO) feature was enabled on the output device. A local, unprivileged user could use this flaw to cause a denial of service or, potentially, escalate their privileges on the system. (CVE-2013-4470, Important)

* A flaw was found in the way the perf_trace_event_perm() function in the Linux kernel checked permissions for the function tracer functionality. An unprivileged local user could use this flaw to enable function tracing and cause a denial of service on the system.
(CVE-2013-2930, Moderate)

* A flaw was found in the way the net_ctl_permissions() function in the Linux kernel checked access permissions. A local, unprivileged user could potentially use this flaw to access certain files in /proc/sys/net regardless of the underlying file system permissions.
(CVE-2013-4270, Moderate)

* A flaw was found in the way the Linux kernel's Adaptec RAID controller (aacraid) checked permissions of compat IOCTLs. A local attacker could use this flaw to bypass intended security restrictions.
(CVE-2013-6383, Moderate)

* A flaw was found in the way the get_dumpable() function return value was interpreted in the ptrace subsystem of the Linux kernel. When 'fs.suid_dumpable' was set to 2, a local, unprivileged local user could use this flaw to bypass intended ptrace restrictions and obtain potentially sensitive information. (CVE-2013-2929, Low)

* An invalid pointer dereference flaw was found in the Marvell 8xxx Libertas WLAN (libertas) driver in the Linux kernel. A local user able to write to a file that is provided by the libertas driver and located on the debug file system (debugfs) could use this flaw to crash the system. Note: The debugfs file system must be mounted locally to exploit this issue. It is not mounted by default. (CVE-2013-6378, Low)

* A NULL pointer dereference flaw was found in the Linux kernel's IPv6 source address-based routing implementation. A local attacker who has the CAP_NET_ADMIN capability could use this flaw to crash the system.
(CVE-2013-6431, Low)

Red Hat would like to thank Hannes Frederic Sowa for reporting CVE-2013-4470. The CVE-2013-4270 issue was discovered by Miroslav Vadkerti of Red Hat.

This update also fixes multiple bugs. Documentation for these changes will be available shortly from the Technical Notes document linked to in the References section.

Users should upgrade to these updated packages, which upgrade the kernel-rt kernel to version kernel-rt-3.8.13-rt27, correct these issues, and fix the bugs noted in the Red Hat Enterprise MRG 2 Technical Notes. 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-2014-3002 advisory.

    - ip_output: do skb ufo init for peeked non ufo skb as well (Jiri Pirko) [Orabug: 17951078]     {CVE-2013-4470}
    - ip6_output: do skb ufo init for peeked non ufo skb as well (Jiri Pirko) [Orabug: 17951080]     {CVE-2013-4470}
    - KVM: x86: fix guest-initiated crash with x2apic (CVE-2013-6376) (Gleb Natapov) [Orabug: 17951067]     {CVE-2013-6376}
    - KVM: x86: Convert vapic synchronization to _cached functions (CVE-2013-6368) (Andy Honig) [Orabug:
    17951071] {CVE-2013-6368}
    - KVM: x86: Fix potential divide by 0 in lapic (CVE-2013-6367) (Andy Honig) [Orabug: 17951073]     {CVE-2013-6367}
    - KVM: Fix iommu map/unmap to handle memory slot moves (Alex Williamson) [Orabug: 17841960]     {CVE-2013-4592}
    - ansi_cprng: Fix off by one error in non-block size request (Jerry Snitselaar) [Orabug: 17837997]     {CVE-2013-4345}

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.

Miroslav Vadkerti discovered a flaw in how the permissions for network sysctls are handled in the Linux kernel. An unprivileged local user could exploit this flaw to have privileged access to files in /proc/sys/net/. (CVE-2013-4270)

A flaw was discovered in the Linux kernel's dm snapshot facility. A remote authenticated user could exploit this flaw to obtain sensitive information or modify/corrupt data. (CVE-2013-4299)

Wannes Rombouts reported a vulnerability in the networking tuntap interface of the Linux kernel. A local user with the CAP_NET_ADMIN capability could leverage this flaw to gain full admin privileges.
(CVE-2013-4343)

Alan Chester reported a flaw in the IPv6 Stream Control Transmission Protocol (SCTP) of the Linux kernel. A remote attacker could exploit this flaw to obtain sensitive information by sniffing network traffic.
(CVE-2013-4350)

Dmitry Vyukov reported a flaw in the Linux kernel's handling of IPv6 UDP Fragmentation Offload (UFO) processing. A remote attacker could leverage this flaw to cause a denial of service (system crash).
(CVE-2013-4387)

Hannes Frederic Sowa discovered a flaw in the Linux kernel's UDP Fragmenttation Offload (UFO). An unprivileged local user could exploit this flaw to cause a denial of service (system crash) or possibly gain administrative privileges. (CVE-2013-4470).

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.

ID	Name	Product	Family	Severity
217886	Linux Distros Unpatched Vulnerability : CVE-2013-4270	Nessus	Misc.	high
124802	EulerOS Virtualization for ARM 64 3.0.1.0 : kernel (EulerOS-SA-2019-1478)	Nessus	Huawei Local Security Checks	high
124797	EulerOS Virtualization 3.0.1.0 : kernel (EulerOS-SA-2019-1473)	Nessus	Huawei Local Security Checks	medium
76672	RHEL 6 : MRG (RHSA-2014:0100)	Nessus	Red Hat Local Security Checks	medium
72472	Oracle Linux 6 : Unbreakable Enterprise kernel (ELSA-2014-3002)	Nessus	Oracle Linux Local Security Checks	medium
71260	Ubuntu 13.10 : linux vulnerabilities (USN-2049-1)	Nessus	Ubuntu Local Security Checks	medium

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