Linux kernel vhost since version 4.8 does not properly initialize memory in messages passed between virtual guests and the host operating system in the vhost/vhost.c:vhost_new_msg() function. This can allow local privileged users to read some kernel memory contents when reading from the /dev/vhost-net device file.

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 kernel package contains the Linux kernel (vmlinuz),     the core of any Linux operating system. The kernel     handles the basic functions of the operating system:
    memory allocation, process allocation, device input and     output, etc.Security Fix(es):The walk_hugetlb_range()     function in 'mm/pagewalk.c' file in the Linux kernel     from v4.0-rc1 through v4.15-rc1 mishandles holes in     hugetlb ranges. This allows local users to obtain     sensitive information from uninitialized kernel memory     via crafted use of the mincore() system     call.(CVE-2017-16994)In the Linux kernel before 4.7,     the amd_gpio_remove function in     drivers/pinctrl/pinctrl-amd.c calls the     pinctrl_unregister function, leading to a double     free.(CVE-2017-18174)In the Linux kernel through     4.20.11, af_alg_release() in crypto/af_alg.c neglects     to set a NULL value for a certain structure member,     which leads to a use-after-free in     sockfs_setattr.(CVE-2019-8912)A security flaw was found     in the Linux kernel that an attempt to move page mapped     by AIO ring buffer to the other node triggers NULL     pointer dereference at trace_writeback_dirty_page(),     because aio_fs_backing_dev_info.dev is     0.(CVE-2016-3070)The NFSv4 implementation in the Linux     kernel through 4.11.1 allows local users to cause a     denial of service (resource consumption) by leveraging     improper channel callback shutdown when unmounting an     NFSv4 filesystem, aka a 'module reference and kernel     daemon' leak.(CVE-2017-9059)When creating audit records     for parameters to executed children processes, an     attacker can convince the Linux kernel audit subsystem     can create corrupt records which may allow an attacker     to misrepresent or evade logging of executing     commands.(CVE-2016-6136)A use-after-free vulnerability     was found in a network namespaces code affecting the     Linux kernel since v4.0-rc1 through v4.15-rc5. The     function get_net_ns_by_id() does not check for the     net::count value after it has found a peer network in     netns_ids idr which could lead to double free and     memory corruption. This vulnerability could allow an     unprivileged local user to induce kernel memory     corruption on the system, leading to a crash. Due to     the nature of the flaw, privilege escalation cannot be     fully ruled out, although it is thought to be     unlikely.(CVE-2017-15129)A NULL pointer dereference     flaw was found in the rds_ib_laddr_check() function in     the Linux kernel's implementation of Reliable Datagram     Sockets (RDS). A local, unprivileged user could use     this flaw to crash the system.(CVE-2013-7339)A flaw was     found in the Linux kernel key management subsystem in     which a local attacker could crash the kernel or     corrupt the stack and additional memory (denial of     service) by supplying a specially crafted RSA key. This     flaw panics the machine during the verification of the     RSA key.(CVE-2016-8650)The uio_mmap_physical function     in drivers/uio/uio.c in the Linux kernel before 3.12     does not validate the size of a memory block, which     allows local users to cause a denial of service (memory     corruption) or possibly gain privileges via crafted     mmap operations, a different vulnerability than     CVE-2013-4511.(CVE-2013-6763)In the Linux kernel before     4.20.5, attackers can trigger a     drivers/char/ipmi/ipmi_msghandler.c use-after-free and     OOPS by arranging for certain simultaneous execution of     the code, as demonstrated by a 'service ipmievd     restart' loop.(CVE-2019-9003)An integer overflow flaw     was found in the way the Linux kernel randomized the     stack for processes on certain 64-bit architecture     systems, such as x86-64, causing the stack entropy to     be reduced by four.(CVE-2015-1593)The     compat_sys_recvmmsg function in net/compat.c in the     Linux kernel before 3.13.2, when CONFIG_X86_X32 is     enabled, allows local users to gain privileges via a     recvmmsg system call with a crafted timeout pointer     parameter.(CVE-2014-0038)The kill_something_info     function in kernel/signal.c in the Linux kernel before     4.13, when an unspecified architecture and compiler is     used, might allow local users to cause a denial of     service via an INT_MIN     argument.(CVE-2018-10124)arch/s390/kernel/head64.S in     the Linux kernel before 3.13.5 on the s390 platform     does not properly handle attempted use of the linkage     stack, which allows local users to cause a denial of     service (system crash) by executing a crafted     instruction.(CVE-2014-2039)A flaw was found in the     Linux kernel in that the aoedisk_debugfs_show()     function in drivers/block/aoe/aoeblk.c allows local     users to obtain some kernel address information by     reading a debugfs file. This address is not useful to     commit a further attack.(CVE-2018-7754)ALSA sequencer     core initializes the event pool on demand by invoking     snd_seq_pool_init() when the first write happens and     the pool is empty. A user can reset the pool size     manually via ioctl concurrently, and this may lead to     UAF or out-of-bound access.(CVE-2018-7566)In the     function wmi_set_ie(), the length validation code does     not handle unsigned integer overflow properly. As a     result, a large value of the 'ie_len' argument can     cause a buffer overflow in all Android releases from     CAF (Android for MSM, Firefox OS for MSM, QRD Android)     using the Linux Kernel.(CVE-2018-5848)The Linux kernel     does not properly initialize memory in messages passed     between virtual guests and the host operating system in     the vhost/vhost.c:vhost_new_msg() function. This can     allow local privileged users to read some kernel memory     contents when reading from the /dev/vhost-net device     file.(CVE-2018-1118)Systems with microprocessors     utilizing speculative execution and speculative     execution of memory reads before the addresses of all     prior memory writes are known may allow unauthorized     disclosure of information to an attacker with local     user access via a side-channel analysis, aka     Speculative Store Bypass (SSB), Variant     4.(CVE-2018-3639)

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 installation on the remote host is affected by the following vulnerabilities :

  - An issue was discovered in the Linux kernel through     4.19. An information leak in cdrom_ioctl_select_disc in     drivers/cdrom/cdrom.c could be used by local attackers     to read kernel memory because a cast from unsigned long     to int interferes with bounds checking. This is similar     to CVE-2018-10940 and CVE-2018-16658.(CVE-2018-18710)

  - A flaw was found in mmap in the Linux kernel allowing     the process to map a null page. This allows attackers     to abuse this mechanism to turn null pointer     dereferences into workable exploits.(CVE-2019-9213)

  - The Linux kernel does not properly initialize memory in     messages passed between virtual guests and the host     operating system in the vhost/vhost.c:vhost_new_msg()     function. This can allow local privileged users to read     some kernel memory contents when reading from the     /dev/vhost-net device file.(CVE-2018-1118)

  - It was found that the raw midi kernel driver does not     protect against concurrent access which leads to a     double realloc (double free) in     snd_rawmidi_input_params() and     snd_rawmidi_output_status() which are part of     snd_rawmidi_ioctl() handler in rawmidi.c file. A     malicious local attacker could possibly use this for     privilege escalation.(CVE-2018-10902)

  - A flaw was discovered in the Linux kernel's USB     subsystem in the __usb_get_extra_descriptor() function     in the drivers/usb/core/usb.c which mishandles a size     check during the reading of an extra descriptor data.
    By using a specially crafted USB device which sends a     forged extra descriptor, an unprivileged user with     physical access to the system can potentially cause a     privilege escalation or trigger a system crash or lock     up and thus to cause a denial of service     (DoS).(CVE-2018-20169)

  - In the function wmi_set_ie() in the Linux kernel the     length validation code does not handle unsigned integer     overflow properly. As a result, a large value of the     aEUR~ie_lenaEURtm argument can cause a buffer overflow and     thus a memory corruption leading to a system crash or     other or unspecified impact. Due to the nature of the     flaw, privilege escalation cannot be fully ruled out,     although we believe it is unlikely.(CVE-2018-5848)

  - A new software page cache side channel attack scenario     was discovered in operating systems that implement the     very common 'page cache' caching mechanism. A malicious     user/process could use 'in memory' page-cache knowledge     to infer access timings to shared memory and gain     knowledge which can be used to reduce effectiveness of     cryptographic strength by monitoring algorithmic     behavior, infer access patterns of memory to determine     code paths taken, and exfiltrate data to a blinded     attacker through page-granularity access times as a     side-channel.(CVE-2019-5489)

  - A security flaw was found in the Linux kernel in a way     that the cleancache subsystem clears an inode after the     final file truncation (removal). The new file created     with the same inode may contain leftover pages from     cleancache and the old file data instead of the new     one.(CVE-2018-16862)

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.

The SUSE Linux Enterprise 15 kernel was updated to receive various security and bugfixes. The following new feature was added :

  - NVDIMM memory error notification (ACPI 6.2) The     following security bugs were fixed :

  - CVE-2018-13406: An integer overflow in the     uvesafb_setcmap function could have result in local     attackers being able to crash the kernel or potentially     elevate privileges because kmalloc_array is not used     (bnc#1100418)

  - CVE-2018-13053: The alarm_timer_nsleep function had an     integer overflow via a large relative timeout because     ktime_add_safe was not used (bnc#1099924)

  - CVE-2018-9385: Prevent overread of the 'driver_override'     buffer (bsc#1100491)

  - CVE-2018-13405: The inode_init_owner function allowed     local users to create files with an unintended group     ownership allowing attackers to escalate privileges by     making a plain file executable and SGID (bnc#1100416)

  - CVE-2017-5753: Systems with microprocessors utilizing     speculative execution and branch prediction may have     allowed unauthorized disclosure of information to an     attacker with local user access via a side-channel     analysis (bsc#1068032)

  - CVE-2018-1118: Linux kernel vhost did not properly     initialize memory in messages passed between virtual     guests and the host operating system. This could have     allowed local privileged users to read some kernel     memory contents when reading from the /dev/vhost-net     device file (bsc#1092472)

  - CVE-2018-12233: A memory corruption bug in JFS could     have been triggered by calling setxattr twice with two     different extended attribute names on the same file.
    This vulnerability could be triggered by an unprivileged     user with the ability to create files and execute     programs (bsc#1097234)

  - CVE-2018-5848: In the function wmi_set_ie(), the length     validation code did not handle unsigned integer overflow     properly. As a result, a large value of the 'ie_len'     argument could have caused a buffer overflow     (bnc#1097356)

  - CVE-2018-1000204: Prevent infoleak caused by incorrect     handling of the SG_IO ioctl (bsc#1096728)

  - CVE-2018-3639: Systems with microprocessors utilizing     speculative execution and speculative execution of     memory reads the addresses of all prior memory writes     are known may have allowed unauthorized disclosure of     information to an attacker with local user access via a     side-channel analysis, aka Speculative Store Bypass     (SSB), Variant 4 (bsc#1087082)

  - CVE-2018-1120: By mmap()ing a FUSE-backed file onto a     process's memory containing command line arguments (or     environment strings), an attacker could have caused     utilities from psutils or procps (such as ps, w) to     block indefinitely (denial of service) or for some     controlled time (as a synchronization primitive for     other attacks) (bsc#1093158)

  - CVE-2018-1094: The ext4_fill_super function did not     always initialize the crc32c checksum driver, which     allowed attackers to cause a denial of service     (ext4_xattr_inode_hash NULL pointer dereference and     system crash) via a crafted ext4 image (bsc#1087007)

  - CVE-2018-1092: The ext4_iget function mishandled the     case of a root directory with a zero i_links_count,     which allowed attackers to cause a denial of service     (ext4_process_freed_data NULL pointer dereference and     OOPS) via a crafted ext4 image (bsc#1087012)

  - 1093: The ext4_valid_block_bitmap function allowed     attackers to cause a denial of service (out-of-bounds     read and system crash) via a crafted ext4 image because     balloc.c and ialloc.c do not validate bitmap block     numbers (bsc#1087095)

  - CVE-2018-1000200: Prevent NULL pointer dereference which     could have resulted in an out of memory (OOM) killing of     large mlocked processes (bsc#1090150)

  - CVE-2018-1130: NULL pointer dereference in     dccp_write_xmit() function that allowed a local user to     cause a denial of service by a number of certain crafted     system calls (bsc#1092904)

  - CVE-2018-5803: Prevent error in the '_sctp_make_chunk()'     function when handling SCTP packets length that could     have been exploited to cause a kernel crash     (bnc#1083900)

  - CVE-2018-7492: Prevent NULL pointer dereference in the     net/rds/rdma.c __rds_rdma_map() function that allowed     local attackers to cause a system panic and a     denial-of-service, related to RDS_GET_MR and     RDS_GET_MR_FOR_DEST (bsc#1082962)

  - CVE-2018-8781: The udl_fb_mmap function had an     integer-overflow vulnerability allowing local users with     access to the udldrmfb driver to obtain full read and     write permissions on kernel physical pages, resulting in     a code execution in kernel space (bsc#1090643)

  - CVE-2018-10124: The kill_something_info function in     kernel/signal.c might have allowed local users to cause     a denial of service via an INT_MIN argument     (bnc#1089752)

  - CVE-2018-10087: The kernel_wait4 function in     kernel/exit.c might have allowed local users to cause a     denial of service by triggering an attempted use of the

-INT_MIN value (bnc#1089608)

  - CVE-2017-5715: Prevent unauthorized disclosure of     information to an attacker with local user access caused     by speculative execution and indirect branch prediction     (bsc#1068032)

The update package also includes non-security fixes. See advisory for details.

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

Security Fix(es) :

  - A flaw named FragmentSmack was found in the way the     Linux kernel handled reassembly of fragmented IPv4 and     IPv6 packets. A remote attacker could use this flaw to     trigger time and calculation expensive fragment     reassembly algorithm by sending specially crafted     packets which could lead to a CPU saturation and hence a     denial of service on the system. (CVE-2018-5391)

  - kernel: out-of-bounds access in the show_timer function     in kernel/time /posix-timers.c (CVE-2017-18344)

  - kernel: Integer overflow in udl_fb_mmap() can allow     attackers to execute code in kernel space     (CVE-2018-8781)

  - kernel: MIDI driver race condition leads to a     double-free (CVE-2018-10902)

  - kernel: Missing check in inode_init_owner() does not     clear SGID bit on non-directories for non-members     (CVE-2018-13405)

  - kernel: AIO write triggers integer overflow in some     protocols (CVE-2015-8830)

  - kernel: Use-after-free in snd_pcm_info function in ALSA     subsystem potentially leads to privilege escalation     (CVE-2017-0861)

  - kernel: Handling of might_cancel queueing is not     properly pretected against race (CVE-2017-10661)

  - kernel: Salsa20 encryption algorithm does not correctly     handle zero- length inputs allowing local attackers to     cause denial of service (CVE-2017-17805)

  - kernel: Inifinite loop vulnerability in     madvise_willneed() function allows local denial of     service (CVE-2017-18208)

  - kernel: fuse-backed file mmap-ed onto process cmdline     arguments causes denial of service (CVE-2018-1120)

  - kernel: a NULL pointer dereference in dccp_write_xmit()     leads to a system crash (CVE-2018-1130)

  - kernel: drivers/block/loop.c mishandles lo_release     serialization allowing denial of service (CVE-2018-5344)

  - kernel: Missing length check of payload in
    _sctp_make_chunk() function allows denial of service     (CVE-2018-5803)

  - kernel: buffer overflow in     drivers/net/wireless/ath/wil6210/wmi.c:wmi_set_ie() may     lead to memory corruption (CVE-2018-5848)

  - kernel: out-of-bound write in ext4_init_block_bitmap     function with a crafted ext4 image (CVE-2018-10878)

  - kernel: Improper validation in bnx2x network card driver     can allow for denial of service attacks via crafted     packet (CVE-2018-1000026)

  - kernel: Information leak when handling NM entries     containing NUL (CVE-2016-4913)

  - kernel: Mishandling mutex within libsas allowing local     Denial of Service (CVE-2017-18232)

  - kernel: NULL pointer dereference in     ext4_process_freed_data() when mounting crafted ext4     image (CVE-2018-1092)

  - kernel: NULL pointer dereference in     ext4_xattr_inode_hash() causes crash with crafted ext4     image (CVE-2018-1094)

  - kernel: vhost: Information disclosure in     vhost/vhost.c:vhost_new_msg() (CVE-2018-1118)

  - kernel: Denial of service in resv_map_release function     in mm/hugetlb.c (CVE-2018-7740)

  - kernel: Memory leak in the sas_smp_get_phy_events     function in drivers/scsi/libsas/sas_expander.c     (CVE-2018-7757)

  - kernel: Invalid pointer dereference in     xfs_ilock_attr_map_shared() when mounting crafted xfs     image allowing denial of service (CVE-2018-10322)

  - kernel: use-after-free detected in ext4_xattr_set_entry     with a crafted file (CVE-2018-10879)

  - kernel: out-of-bound access in ext4_get_group_info()     when mounting and operating a crafted ext4 image     (CVE-2018-10881)

  - kernel: stack-out-of-bounds write in     jbd2_journal_dirty_metadata function (CVE-2018-10883)

  - kernel: incorrect memory bounds check in     drivers/cdrom/cdrom.c (CVE-2018-10940)

An update for kernel is now available for Red Hat Enterprise Linux 7.

Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.

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

Security Fix(es) :

* A flaw named FragmentSmack was found in the way the Linux kernel handled reassembly of fragmented IPv4 and IPv6 packets. A remote attacker could use this flaw to trigger time and calculation expensive fragment reassembly algorithm by sending specially crafted packets which could lead to a CPU saturation and hence a denial of service on the system. (CVE-2018-5391)

* kernel: out-of-bounds access in the show_timer function in kernel/time/ posix-timers.c (CVE-2017-18344)

* kernel: Integer overflow in udl_fb_mmap() can allow attackers to execute code in kernel space (CVE-2018-8781)

* kernel: MIDI driver race condition leads to a double-free (CVE-2018-10902)

* kernel: Missing check in inode_init_owner() does not clear SGID bit on non-directories for non-members (CVE-2018-13405)

* kernel: AIO write triggers integer overflow in some protocols (CVE-2015-8830)

* kernel: Use-after-free in snd_pcm_info function in ALSA subsystem potentially leads to privilege escalation (CVE-2017-0861)

* kernel: Handling of might_cancel queueing is not properly pretected against race (CVE-2017-10661)

* kernel: Salsa20 encryption algorithm does not correctly handle zero-length inputs allowing local attackers to cause denial of service (CVE-2017-17805)

* kernel: Inifinite loop vulnerability in madvise_willneed() function allows local denial of service (CVE-2017-18208)

* kernel: fuse-backed file mmap-ed onto process cmdline arguments causes denial of service (CVE-2018-1120)

* kernel: a NULL pointer dereference in dccp_write_xmit() leads to a system crash (CVE-2018-1130)

* kernel: drivers/block/loop.c mishandles lo_release serialization allowing denial of service (CVE-2018-5344)

* kernel: Missing length check of payload in _sctp_make_chunk() function allows denial of service (CVE-2018-5803)

* kernel: buffer overflow in drivers/net/wireless/ath/wil6210/ wmi.c:wmi_set_ie() may lead to memory corruption (CVE-2018-5848)

* kernel: out-of-bound write in ext4_init_block_bitmap function with a crafted ext4 image (CVE-2018-10878)

* kernel: Improper validation in bnx2x network card driver can allow for denial of service attacks via crafted packet (CVE-2018-1000026)

* kernel: Information leak when handling NM entries containing NUL (CVE-2016-4913)

* kernel: Mishandling mutex within libsas allowing local Denial of Service (CVE-2017-18232)

* kernel: NULL pointer dereference in ext4_process_freed_data() when mounting crafted ext4 image (CVE-2018-1092)

* kernel: NULL pointer dereference in ext4_xattr_inode_hash() causes crash with crafted ext4 image (CVE-2018-1094)

* kernel: vhost: Information disclosure in vhost/vhost.c:vhost_new_msg() (CVE-2018-1118)

* kernel: Denial of service in resv_map_release function in mm/hugetlb.c (CVE-2018-7740)

* kernel: Memory leak in the sas_smp_get_phy_events function in drivers/scsi/ libsas/sas_expander.c (CVE-2018-7757)

* kernel: Invalid pointer dereference in xfs_ilock_attr_map_shared() when mounting crafted xfs image allowing denial of service (CVE-2018-10322)

* kernel: use-after-free detected in ext4_xattr_set_entry with a crafted file (CVE-2018-10879)

* kernel: out-of-bound access in ext4_get_group_info() when mounting and operating a crafted ext4 image (CVE-2018-10881)

* kernel: stack-out-of-bounds write in jbd2_journal_dirty_metadata function (CVE-2018-10883)

* kernel: incorrect memory bounds check in drivers/cdrom/cdrom.c (CVE-2018-10940)

Red Hat would like to thank Juha-Matti Tilli (Aalto University - Department of Communications and Networking and Nokia Bell Labs) for reporting CVE-2018-5391; Trend Micro Zero Day Initiative for reporting CVE-2018-10902; Qualys Research Labs for reporting CVE-2018-1120;
Evgenii Shatokhin (Virtuozzo Team) for reporting CVE-2018-1130; and Wen Xu for reporting CVE-2018-1092 and CVE-2018-1094.

The remote Oracle Linux 7 host has packages installed that are affected by multiple vulnerabilities as referenced in the ELSA-2018-3083 advisory.

    - [fs] exec: Limit arg stack to at most 75 of _STK_LIM (Yauheni Kaliuta) [1625991] {CVE-2018-14634}
    - [fs] exec: account for argv/envp pointers (Yauheni Kaliuta) [1625991] {CVE-2018-14634}
    - [cdrom] information leak in cdrom_ioctl_media_changed() (Sanskriti Sharma) [1578207] {CVE-2018-10940}
    - [fs] fs: get_rock_ridge_filename(): handle malformed NM entries (Bill O'Donnell) [1340778]     {CVE-2016-4913}
    - [mm] madvise: fix madvise() infinite loop under special circumstances (Rafael Aquini) [1552982]     {CVE-2017-18208}
    - [kernel] posix-timer: Properly check sigevent->sigev_notify (Phil Auld) [1613711] {CVE-2017-18344}
    - [sound] alsa: rawmidi: Change resized buffers atomically (Denys Vlasenko) [1593087] {CVE-2018-10902}
    - [fs] Fix up non-directory creation in SGID directories (Miklos Szeredi) [1600953] {CVE-2018-13405}
    - [scsi] libsas: fix memory leak in sas_smp_get_phy_events() (Tomas Henzl) [1558582] {CVE-2018-7757}
    - [vhost] fix info leak due to uninitialized memory (Jason Wang) [1573705] {CVE-2018-1118}
    - [net] ip: process in-order fragments efficiently (Sabrina Dubroca) [1613924] {CVE-2018-5391}
    - [net] ipv6: defrag: drop non-last frags smaller than min mtu (Sabrina Dubroca) [1613924] {CVE-2018-5391}
    - [net] ip: use rb trees for IP frag queue (Sabrina Dubroca) [1613924] {CVE-2018-5391}
    - [net] revert ipv4: use skb coalescing in defragmentation (Sabrina Dubroca) [1613924] {CVE-2018-5391}
    - [net] modify skb_rbtree_purge to return the truesize of all purged skbs (Sabrina Dubroca) [1613924]     {CVE-2018-5391}
    - [net] ip: discard IPv4 datagrams with overlapping segments (Sabrina Dubroca) [1613924] {CVE-2018-5391}
    - [net] speed up skb_rbtree_purge() (Sabrina Dubroca) [1613924] {CVE-2018-5391}
    - [fs] timerfd: Protect the might cancel mechanism proper (Bill O'Donnell) [1485407] {CVE-2017-10661}
    - [netdrv] bnx2x: disable GSO where gso_size is too big for hardware (Jonathan Toppins) [1546760]     {CVE-2018-1000026}
    - [net] create skb_gso_validate_mac_len() (Jonathan Toppins) [1546760] {CVE-2018-1000026}
    - [fs] aio: properly check iovec sizes (Jeff Moyer) [1337518] {CVE-2015-8830}
    - [fs] ext4: avoid running out of journal credits when appending to an inline file (Lukas Czerner)     [1609759] {CVE-2018-10883}
    - [fs] jbd2: don't mark block as modified if the handle is out of credits (Lukas Czerner) [1609759]     {CVE-2018-10883}

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 Redhat Enterprise Linux 7 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2018:3096 advisory.

    The kernel-rt packages provide the Real Time Linux Kernel, which enables fine-tuning for systems with     extremely high determinism requirements.

    Security Fix(es):

    * A flaw named FragmentSmack was found in the way the Linux kernel handled reassembly of fragmented IPv4     and IPv6 packets. A remote attacker could use this flaw to trigger time and calculation expensive fragment     reassembly algorithm by sending specially crafted packets which could lead to a CPU saturation and hence a     denial of service on the system. (CVE-2018-5391)

    * kernel: out-of-bounds access in the show_timer function in kernel/time/posix-timers.c (CVE-2017-18344)

    * kernel: Integer overflow in udl_fb_mmap() can allow attackers to execute code in kernel space     (CVE-2018-8781)

    * kernel: MIDI driver race condition leads to a double-free (CVE-2018-10902)

    * kernel: Missing check in inode_init_owner() does not clear SGID bit on non-directories for non-members     (CVE-2018-13405)

    * kernel: AIO write triggers integer overflow in some protocols (CVE-2015-8830)

    * kernel: Use-after-free in snd_pcm_info function in ALSA subsystem potentially leads to privilege     escalation (CVE-2017-0861)

    * kernel: Handling of might_cancel queueing is not properly pretected against race (CVE-2017-10661)

    * kernel: Salsa20 encryption algorithm does not correctly handle zero-length inputs allowing local     attackers to cause denial of service (CVE-2017-17805)

    * kernel: Inifinite loop vulnerability in madvise_willneed() function allows local denial of service     (CVE-2017-18208)

    * kernel: fuse-backed file mmap-ed onto process cmdline arguments causes denial of service (CVE-2018-1120)

    * kernel: a null pointer dereference in dccp_write_xmit() leads to a system crash (CVE-2018-1130)

    * kernel: drivers/block/loop.c mishandles lo_release serialization allowing denial of service     (CVE-2018-5344)

    * kernel: Missing length check of payload in _sctp_make_chunk() function allows denial of service     (CVE-2018-5803)

    * kernel: buffer overflow in drivers/net/wireless/ath/wil6210/wmi.c:wmi_set_ie() may lead to memory     corruption (CVE-2018-5848)

    * kernel: out-of-bound write in ext4_init_block_bitmap function with a crafted ext4 image (CVE-2018-10878)

    * kernel: Improper validation in bnx2x network card driver can allow for denial of service attacks via     crafted packet (CVE-2018-1000026)

    * kernel: Information leak when handling NM entries containing NUL (CVE-2016-4913)

    * kernel: Mishandling mutex within libsas allowing local Denial of Service (CVE-2017-18232)

    * kernel: NULL pointer dereference in ext4_process_freed_data() when mounting crafted ext4 image     (CVE-2018-1092)

    * kernel: NULL pointer dereference in ext4_xattr_inode_hash() causes crash with crafted ext4 image     (CVE-2018-1094)

    * kernel: vhost: Information disclosure in vhost.c:vhost_new_msg() (CVE-2018-1118)

    * kernel: Denial of service in resv_map_release function in mm/hugetlb.c (CVE-2018-7740)

    * kernel: Memory leak in the sas_smp_get_phy_events function in drivers/scsi/libsas/sas_expander.c     (CVE-2018-7757)

    * kernel: Invalid pointer dereference in xfs_ilock_attr_map_shared() when mounting crafted xfs image     allowing denial of service (CVE-2018-10322)

    * kernel: use-after-free detected in ext4_xattr_set_entry with a crafted file (CVE-2018-10879)

    * kernel: out-of-bound access in ext4_get_group_info() when mounting and operating a crafted ext4 image     (CVE-2018-10881)

    * kernel: stack-out-of-bounds write in jbd2_journal_dirty_metadata function (CVE-2018-10883)

    * kernel: incorrect memory bounds check in drivers/cdrom/cdrom.c (CVE-2018-10940)

    Red Hat would like to thank Juha-Matti Tilli (Aalto University - Department of Communications and     Networking and Nokia Bell Labs) for reporting CVE-2018-5391; Trend Micro Zero Day Initiative for reporting     CVE-2018-10902; Qualys Research Labs for reporting CVE-2018-1120; Evgenii Shatokhin (Virtuozzo Team) for     reporting CVE-2018-1130; and Wen Xu for reporting CVE-2018-1092 and CVE-2018-1094.

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 remote Redhat Enterprise Linux 7 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2018:3083 advisory.

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

    Security Fix(es):

    * A flaw named FragmentSmack was found in the way the Linux kernel handled reassembly of fragmented IPv4     and IPv6 packets. A remote attacker could use this flaw to trigger time and calculation expensive fragment     reassembly algorithm by sending specially crafted packets which could lead to a CPU saturation and hence a     denial of service on the system. (CVE-2018-5391)

    * kernel: out-of-bounds access in the show_timer function in kernel/time/posix-timers.c (CVE-2017-18344)

    * kernel: Integer overflow in udl_fb_mmap() can allow attackers to execute code in kernel space     (CVE-2018-8781)

    * kernel: MIDI driver race condition leads to a double-free (CVE-2018-10902)

    * kernel: Missing check in inode_init_owner() does not clear SGID bit on non-directories for non-members     (CVE-2018-13405)

    * kernel: AIO write triggers integer overflow in some protocols (CVE-2015-8830)

    * kernel: Use-after-free in snd_pcm_info function in ALSA subsystem potentially leads to privilege     escalation (CVE-2017-0861)

    * kernel: Handling of might_cancel queueing is not properly pretected against race (CVE-2017-10661)

    * kernel: Salsa20 encryption algorithm does not correctly handle zero-length inputs allowing local     attackers to cause denial of service (CVE-2017-17805)

    * kernel: Inifinite loop vulnerability in madvise_willneed() function allows local denial of service     (CVE-2017-18208)

    * kernel: fuse-backed file mmap-ed onto process cmdline arguments causes denial of service (CVE-2018-1120)

    * kernel: a null pointer dereference in dccp_write_xmit() leads to a system crash (CVE-2018-1130)

    * kernel: drivers/block/loop.c mishandles lo_release serialization allowing denial of service     (CVE-2018-5344)

    * kernel: Missing length check of payload in _sctp_make_chunk() function allows denial of service     (CVE-2018-5803)

    * kernel: buffer overflow in drivers/net/wireless/ath/wil6210/wmi.c:wmi_set_ie() may lead to memory     corruption (CVE-2018-5848)

    * kernel: out-of-bound write in ext4_init_block_bitmap function with a crafted ext4 image (CVE-2018-10878)

    * kernel: Improper validation in bnx2x network card driver can allow for denial of service attacks via     crafted packet (CVE-2018-1000026)

    * kernel: Information leak when handling NM entries containing NUL (CVE-2016-4913)

    * kernel: Mishandling mutex within libsas allowing local Denial of Service (CVE-2017-18232)

    * kernel: NULL pointer dereference in ext4_process_freed_data() when mounting crafted ext4 image     (CVE-2018-1092)

    * kernel: NULL pointer dereference in ext4_xattr_inode_hash() causes crash with crafted ext4 image     (CVE-2018-1094)

    * kernel: vhost: Information disclosure in vhost/vhost.c:vhost_new_msg() (CVE-2018-1118)

    * kernel: Denial of service in resv_map_release function in mm/hugetlb.c (CVE-2018-7740)

    * kernel: Memory leak in the sas_smp_get_phy_events function in drivers/scsi/libsas/sas_expander.c     (CVE-2018-7757)

    * kernel: Invalid pointer dereference in xfs_ilock_attr_map_shared() when mounting crafted xfs image     allowing denial of service (CVE-2018-10322)

    * kernel: use-after-free detected in ext4_xattr_set_entry with a crafted file (CVE-2018-10879)

    * kernel: out-of-bound access in ext4_get_group_info() when mounting and operating a crafted ext4 image     (CVE-2018-10881)

    * kernel: stack-out-of-bounds write in jbd2_journal_dirty_metadata function (CVE-2018-10883)

    * kernel: incorrect memory bounds check in drivers/cdrom/cdrom.c (CVE-2018-10940)

    Red Hat would like to thank Juha-Matti Tilli (Aalto University - Department of Communications and     Networking and Nokia Bell Labs) for reporting CVE-2018-5391; Trend Micro Zero Day Initiative for reporting     CVE-2018-10902; Qualys Research Labs for reporting CVE-2018-1120; Evgenii Shatokhin (Virtuozzo Team) for     reporting CVE-2018-1130; and Wen Xu for reporting CVE-2018-1092 and CVE-2018-1094.

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 remote Redhat Enterprise Linux 7 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2018:2948 advisory.

  - kernel: v4l2: disabled memory access protection mechanism allowing privilege escalation (CVE-2017-13166)

  - kernel: Use-after-free in drivers/media/dvb-core/dvb_frontend.c (CVE-2017-16648)

  - kernel: Salsa20 encryption algorithm does not correctly handle zero-length inputs allowing local attackers     to cause denial-of-service (CVE-2017-17805)

  - kernel: HMAC implementation does not validate that the underlying cryptographic hash algorithm is unkeyed     allowing local attackers to cause denial-of-service (CVE-2017-17806)

  - kernel: Mishandled freeing of instances in pcrypt.c can allow a local user to cause a denial of service     (CVE-2017-18075)

  - kernel: Inifinite loop vulnerability in mm/madvise.c:madvise_willneed() function allows local denial of     service (CVE-2017-18208)

  - kernel: out-of-bounds access in the show_timer function in kernel/time/posix-timers.c (CVE-2017-18344)

  - kernel: netfilter: xtables NULL pointer dereference in ip6_tables.c:ip6t_do_table() leading to a crash     (CVE-2018-1065)

  - kernel: Out-of-bounds write via userland offsets in ebt_entry struct in netfilter/ebtables.c     (CVE-2018-1068)

  - kernel: NULL pointer dereference in ext4/mballoc.c:ext4_process_freed_data() when mounting crafted ext4     image (CVE-2018-1092)

  - kernel: NULL pointer dereference in ext4/xattr.c:ext4_xattr_inode_hash() causes crash with crafted ext4     image (CVE-2018-1094)

  - kernel: out-of-bound access in fs/posix_acl.c:get_acl() causes crash with crafted ext4 image     (CVE-2018-1095)

  - kernel: vhost: Information disclosure in vhost/vhost.c:vhost_new_msg() (CVE-2018-1118)

  - kernel: fuse-backed file mmap-ed onto process cmdline arguments causes denial of service (CVE-2018-1120)

  - hw: cpu: speculative store bypass (CVE-2018-3639)

  - kernel: drivers/block/loop.c mishandles lo_release serialization allowing denial-of-service     (CVE-2018-5344)

  - kernel: TCP segments with random offsets allow a remote denial of service (SegmentSmack) (CVE-2018-5390)

  - kernel: IP fragments with random offsets allow a remote denial of service (FragmentSmack) (CVE-2018-5391)

  - kernel: Kernel address information leak in drivers/acpi/sbshc.c:acpi_smbus_hc_add() function potentially     allowing KASLR bypass (CVE-2018-5750)

  - kernel: Missing length check of payload in net/sctp/sm_make_chunk.c:_sctp_make_chunk() function allows     denial of service (CVE-2018-5803)

  - kernel: buffer overflow in drivers/net/wireless/ath/wil6210/wmi.c:wmi_set_ie() may lead to memory     corruption (CVE-2018-5848)

  - kernel: race condition in snd_seq_write() may lead to UAF or OOB-access (CVE-2018-7566)

  - kernel: Memory leak in the sas_smp_get_phy_events function in drivers/scsi/libsas/sas_expander.c     (CVE-2018-7757)

  - kernel: Integer overflow in drivers/gpu/drm/udl/udl_fb.c:udl_fb_mmap() can allow attackers to execute code     in kernel space (CVE-2018-8781)

  - kernel: Buffer overflow in hidp_process_report (CVE-2018-9363)

  - kernel: Invalid pointer dereference in xfs_ilock_attr_map_shared() when mounting crafted xfs image     allowing denial of service (CVE-2018-10322)

  - kernel: out-of-bound access in ext4_ext_drop_refs function with a crafted ext4 image (CVE-2018-10877)

  - kernel: out-of-bound write in ext4_init_block_bitmap function with a crafted ext4 image (CVE-2018-10878)

  - kernel: use-after-free detected in ext4_xattr_set_entry with a crafted file (CVE-2018-10879)

  - kernel: stack-out-of-bounds write in ext4_update_inline_data function (CVE-2018-10880)

  - kernel: out-of-bound access in ext4_get_group_info() when mounting and operating a crafted ext4 image     (CVE-2018-10881)

  - kernel: stack-out-of-bounds write infs/jbd2/transaction.c (CVE-2018-10882)

  - kernel: stack-out-of-bounds write in jbd2_journal_dirty_metadata function (CVE-2018-10883)

  - kernel: incorrect memory bounds check in drivers/cdrom/cdrom.c (CVE-2018-10940)

  - kernel: Stack-based buffer overflow in drivers/scsi/sr_ioctl.c allows denial of service or other     unspecified impact (CVE-2018-11506)

  - kernel: NULL pointer dereference if close and fchownat system calls share a socket file descriptor     (CVE-2018-12232)

  - kernel: Missing check in fs/inode.c:inode_init_owner() does not clear SGID bit on non-directories for non-     members (CVE-2018-13405)

  - kernel: crash (possible privesc) in kernel crypto api. (CVE-2018-14619)

  - kernel: a bug in ip_frag_reasm() can cause a crash in ip_do_fragment() (CVE-2018-14641)

  - kernel: Improper validation in bnx2x network card driver can allow for denial of service attacks via     crafted packet (CVE-2018-1000026)

  - kernel: NULL pointer dereference on OOM kill of large mlocked process (CVE-2018-1000200)

  - kernel: Infoleak caused by incorrect handling of the SG_IO ioctl (CVE-2018-1000204)

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 16.04 LTS host has a package installed that is affected by multiple vulnerabilities as referenced in the USN-3762-2 advisory.

    USN-3762-1 fixed vulnerabilities in the Linux kernel for Ubuntu 18.04 LTS. This update provides the     corresponding updates for the Linux Hardware Enablement (HWE) kernel from Ubuntu 18.04 LTS for Ubuntu     16.04 LTS.

    It was discovered that the VirtIO subsystem in the Linux kernel did not properly initialize memory in some     situations. A local attacker could use this to possibly expose sensitive information (kernel memory).
    (CVE-2018-1118)

    Seunghun Han discovered an information leak in the ACPI handling code in the Linux kernel when handling     early termination of ACPI table loading. A local attacker could use this to expose sensitive informal     (kernel address locations). (CVE-2017-13695)

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 18.04 LTS host has a package installed that is affected by multiple vulnerabilities as referenced in the USN-3762-1 advisory.

    It was discovered that the VirtIO subsystem in the Linux kernel did not properly initialize memory in some     situations. A local attacker could use this to possibly expose sensitive information (kernel memory).
    (CVE-2018-1118)

    Seunghun Han discovered an information leak in the ACPI handling code in the Linux kernel when handling     early termination of ACPI table loading. A local attacker could use this to expose sensitive informal     (kernel address locations). (CVE-2017-13695)

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.

Linux 4.9 has been packaged for Debian 8 as linux-4.9. This provides a supported upgrade path for systems that currently use kernel packages from the 'jessie-backports' suite.

There is no need to upgrade systems using Linux 3.16, as that kernel version will also continue to be supported in the LTS period.

This backport does not include the following binary packages :

hyperv-daemons libcpupower1 libcpupower-dev libusbip-dev linux-compiler-gcc-4.9-x86 linux-cpupower linux-libc-dev usbip

Older versions of most of those are built from other source packages in Debian 8.

Several vulnerabilities have been discovered in the Linux kernel that may lead to a privilege escalation, denial of service or information leaks.

CVE-2017-5753

Further instances of code that was vulnerable to Spectre variant 1 (bounds-check bypass) have been mitigated.

CVE-2017-18255

It was discovered that the performance events subsystem did not properly validate the value of the kernel.perf_cpu_time_max_percent sysctl. Setting a large value could have an unspecified security impact. However, only a privileged user can set this sysctl.

CVE-2018-1118

The syzbot software found that the vhost driver did not initialise message buffers which would later be read by user processes. A user with access to the /dev/vhost-net device could use this to read sensitive information from the kernel or other users' processes.

CVE-2018-1120

Qualys reported that a user able to mount FUSE filesystems can create a process such that when another process attempting to read its command line will be blocked for an arbitrarily long time. This could be used for denial of service, or to aid in exploiting a race condition in the other program.

CVE-2018-1130

The syzbot software found that the DCCP implementation of sendmsg() does not check the socket state, potentially leading to a NULL pointer dereference. A local user could use this to cause a denial of service (crash). 

CVE-2018-3639

Multiple researchers have discovered that Speculative Store Bypass (SSB), a feature implemented in many processors, could be used to read sensitive information from another context. In particular, code in a software sandbox may be able to read sensitive information from outside the sandbox. This issue is also known as Spectre variant 4.

This update allows the issue to be mitigated on some x86 processors by disabling SSB. This requires an update to the processor's microcode, which is non-free. It may be included in an update to the system BIOS or UEFI firmware, or in a future update to the intel-microcode or amd64-microcode packages.

Disabling SSB can reduce performance significantly, so by default it is only done in tasks that use the seccomp feature. Applications that require this mitigation should request it explicitly through the prctl() system call. Users can control where the mitigation is enabled with the spec_store_bypass_disable kernel parameter.

CVE-2018-5814

Jakub Jirasek reported race conditions in the USB/IP host driver. A malicious client could use this to cause a denial of service (crash or memory corruption), and possibly to execute code, on a USB/IP server.

CVE-2018-10021

A physically present attacker who unplugs a SAS cable can cause a denial of service (memory leak and WARN).

CVE-2018-10087, CVE-2018-10124

zhongjiang found that the wait4() and kill() system call implementations did not check for the invalid pid value of INT_MIN. If a user passed this value, the behaviour of the code was formally undefined and might have had a security impact.

CVE-2018-10853

Andy Lutomirski and Mika Penttil&auml; reported that KVM for x86 processors did not perform a necessary privilege check when emulating certain instructions. This could be used by an unprivileged user in a guest VM to escalate their privileges within the guest.

CVE-2018-10876, CVE-2018-10877, CVE-2018-10878, CVE-2018-10879, CVE-2018-10880, CVE-2018-10881, CVE-2018-10882, CVE-2018-10883

Wen Xu at SSLab, Gatech, reported that crafted ext4 filesystem images could trigger a crash or memory corruption. A local user able to mount arbitrary filesystems, or an attacker providing filesystems to be mounted, could use this for denial of service or possibly for privilege escalation.

CVE-2018-10940

Dan Carpenter reported that the optical disc driver (cdrom) does not correctly validate the parameter to the CDROM_MEDIA_CHANGED ioctl. A user with access to a cdrom device could use this to cause a denial of service (crash).

CVE-2018-11506

Piotr Gabriel Kosinski and Daniel Shapira reported that the SCSI optical disc driver (sr) did not allocate a sufficiently large buffer for sense data. A user with access to a SCSI optical disc device that can produce more than 64 bytes of sense data could use this to cause a denial of service (crash or memory corruption), and possibly for privilege escalation.

CVE-2018-12233

Shankara Pailoor reported that a crafted JFS filesystem image could trigger a denial of service (memory corruption). This could possibly also be used for privilege escalation.

CVE-2018-1000204

The syzbot software found that the SCSI generic driver (sg) would in some circumstances allow reading data from uninitialised buffers, which could include sensitive information from the kernel or other tasks. However, only privileged users with the CAP_SYS_ADMIN or CAP_SYS_RAWIO capability were allowed to do this, so this has little or no security impact.

For Debian 8 'Jessie', these problems have been fixed in version 4.9.110-1~deb8u1. This update additionally fixes Debian bugs #860900, #872907, #892057, #896775, #897590, and #898137; and includes many more bug fixes from stable updates 4.9.89-4.9.110 inclusive.

We recommend that you upgrade your linux-4.9 packages.

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

ID	Name	Product	Family	Severity
124991	EulerOS Virtualization for ARM 64 3.0.1.0 : kernel (EulerOS-SA-2019-1538)	Nessus	Huawei Local Security Checks	critical
123630	EulerOS 2.0 SP5 : kernel (EulerOS-SA-2019-1156)	Nessus	Huawei Local Security Checks	high
123226	openSUSE Security Update : the Linux Kernel (openSUSE-2019-536) (Spectre)	Nessus	SuSE Local Security Checks	high
120067	SUSE SLED15 / SLES15 Security Update : kernel (SUSE-SU-2018:2092-1) (Spectre)	Nessus	SuSE Local Security Checks	high
119187	Scientific Linux Security Update : kernel on SL7.x x86_64 (20181030)	Nessus	Scientific Linux Local Security Checks	high
118990	CentOS 7 : kernel (CESA-2018:3083)	Nessus	CentOS Local Security Checks	high
118770	Oracle Linux 7 : kernel (ELSA-2018-3083)	Nessus	Oracle Linux Local Security Checks	high
118528	RHEL 7 : kernel-rt (RHSA-2018:3096)	Nessus	Red Hat Local Security Checks	high
118525	RHEL 7 : kernel (RHSA-2018:3083)	Nessus	Red Hat Local Security Checks	high
118513	RHEL 7 : kernel-alt (RHSA-2018:2948)	Nessus	Red Hat Local Security Checks	high
117455	Ubuntu 16.04 LTS : Linux kernel (HWE) vulnerabilities (USN-3762-2)	Nessus	Ubuntu Local Security Checks	medium
117454	Ubuntu 18.04 LTS : Linux kernel vulnerabilities (USN-3762-1)	Nessus	Ubuntu Local Security Checks	medium
111414	openSUSE Security Update : the Linux Kernel (openSUSE-2018-762) (Spectre)	Nessus	SuSE Local Security Checks	high
111165	Debian DLA-1423-1 : linux-4.9 new package (Spectre)	Nessus	Debian Local Security Checks	high

Detections

Analytics

CVE-2018-1118

medium

Tenable Plugins

critical

high

high

high

high

high

high

high

high

high

medium

medium

high

high