現已提供適用於 Red Hat Enterprise Linux 7 的 kernel-rt 更新。Red Hat 產品安全性團隊已將此更新評等為具有重要安全性影響。可從〈參照〉一節的 CVE 連結中取得每個弱點之常見弱點評分系統 (CVSS) 的基本分數，其中包含有關嚴重性評等的詳細資訊。kernel-rt 套件提供即時 Linux 核心，其可針對具有極高決定機制需求的系統啟用微調。安全性修正：* 在 Linux 核心發現一個釋放後使用缺陷，造成 L2TPv3 IP Encapsulation 函式出現爭用情形。本機使用者可利用此缺陷提升自己在系統上的權限或使系統當機。(CVE-2016-10200, Important) * 發現一個可在 type->match 為 NULL 時在 keyring.c 的 keyring_search_iterator 中觸發的缺陷。本機使用者可利用此缺陷使系統當機，或可能提升其權限。(CVE-2017-2647，重要) * 據發現，在處理 NFSv4 pNFS LAYOUTGET 及 GETDEVICEINFO 運算元時，Linux 核心中的 NFSv4 伺服器未正確驗證配置類型。遠端攻擊者可利用此缺陷將系統軟式鎖定，然後造成拒絕服務。(CVE-2017-8797，重要) 此更新也會修正多個中度和低度影響安全性問題：* CVE-2015-8839、CVE-2015-8970、CVE-2016-9576、CVE-2016-7042、CVE-2016-7097、CVE-2016-8645、CVE-2016-9576、CVE-2016-9588、CVE-2016-9806、CVE-2016-10088、CVE-2016-10147、CVE-2017-2596、CVE-2017-2671、CVE-2017-5970、CVE-2017-6001、CVE-2017-6951、CVE-2017-7187、CVE-2017-7616、CVE-2017-7889、CVE-2017-8890、CVE-2017-9074、CVE-2017-8890、CVE-2017-9075、CVE-2017-8890、CVE-2017-9076、CVE-2017-8890、CVE-2017-9077、CVE-2017-9242、CVE-2014-7970、CVE-2014-7975、CVE-2016-6213、CVE-2016-9604、CVE-2016-9685 這些問題的相關文件可從〈參照〉一節連結的版本資訊文件中取得。Red Hat 感謝 Igor Redko (Virtuozzo) 和 Andrey Ryabinin (Virtuozzo) 報告 CVE-2017-2647；Igor Redko (Virtuozzo) 和 Vasily Averin (Virtuozzo) 報告 CVE-2015-8970；Marco Grassi 報告 CVE-2016-8645；以及 Dmitry Vyukov (Google Inc.) 報告 CVE-2017-2596。CVE-2016-7042 問題是由 Ondrej Kozina (Red Hat) 所發現；CVE-2016-7097 問題是由 Andreas Gruenbacher (Red Hat) 和 Jan Kara (SUSE) 所發現；CVE-2016-6213 及 CVE-2016-9685 問題是由 Qian Cai (Red Hat) 所發現；以及 CVE-2016-9604 問題是由 David Howells (Red Hat) 所發現。其他變更：如需有關此發行版本的其他詳細變更資訊，請參閱可從〈參照〉一節連結的 Red Hat Enterprise Linux 7.4 版本資訊。

遠端 OracleVM 系統缺少可解決重大安全性更新的必要修補程式：請參閱 Oracle VM 安全性公告 OVMSA-2017-0057 瞭解詳細資料。

The remote Ubuntu 14.04 LTS host has a package installed that is affected by multiple vulnerabilities as referenced in the USN-3422-1 advisory.

    It was discovered that a buffer overflow existed in the Bluetooth stack of the Linux kernel when handling     L2CAP configuration responses. A physically proximate attacker could use this to cause a denial of service     (system crash). (CVE-2017-1000251)

    It was discovered that the asynchronous I/O (aio) subsystem of the Linux kernel did not properly set     permissions on aio memory mappings in some situations. An attacker could use this to more easily exploit     other vulnerabilities. (CVE-2016-10044)

    Baozeng Ding and Andrey Konovalov discovered a race condition in the L2TPv3 IP Encapsulation     implementation in the Linux kernel. A local attacker could use this to cause a denial of service (system     crash) or possibly execute arbitrary code. (CVE-2016-10200)

    Andreas Gruenbacher and Jan Kara discovered that the filesystem implementation in the Linux kernel did not     clear the setgid bit during a setxattr call. A local attacker could use this to possibly elevate group     privileges. (CVE-2016-7097)

    Sergej Schumilo, Ralf Spenneberg, and Hendrik Schwartke discovered that the key management subsystem in     the Linux kernel did not properly allocate memory in some situations. A local attacker could use this to     cause a denial of service (system crash). (CVE-2016-8650)

    Vlad Tsyrklevich discovered an integer overflow vulnerability in the VFIO PCI driver for the Linux kernel.
    A local attacker with access to a vfio PCI device file could use this to cause a denial of service (system     crash) or possibly execute arbitrary code. (CVE-2016-9083, CVE-2016-9084)

    It was discovered that an information leak existed in __get_user_asm_ex() in the Linux kernel. A local     attacker could use this to expose sensitive information. (CVE-2016-9178)

    CAI Qian discovered that the sysctl implementation in the Linux kernel did not properly perform reference     counting in some situations. An unprivileged attacker could use this to cause a denial of service (system     hang). (CVE-2016-9191)

    It was discovered that the keyring implementation in the Linux kernel in some situations did not prevent     special internal keyrings from being joined by userspace keyrings. A privileged local attacker could use     this to bypass module verification. (CVE-2016-9604)

    It was discovered that an integer overflow existed in the trace subsystem of the Linux kernel. A local     privileged attacker could use this to cause a denial of service (system crash). (CVE-2016-9754)

    Andrey Konovalov discovered that the IPv4 implementation in the Linux kernel did not properly handle     invalid IP options in some situations. An attacker could use this to cause a denial of service or possibly     execute arbitrary code. (CVE-2017-5970)

    Dmitry Vyukov discovered that the Linux kernel did not properly handle TCP packets with the URG flag. A     remote attacker could use this to cause a denial of service. (CVE-2017-6214)

    It was discovered that a race condition existed in the AF_PACKET handling code in the Linux kernel. A     local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary     code. (CVE-2017-6346)

    It was discovered that the keyring implementation in the Linux kernel did not properly restrict searches     for dead keys. A local attacker could use this to cause a denial of service (system crash).
    (CVE-2017-6951)

    Dmitry Vyukov discovered that the generic SCSI (sg) subsystem in the Linux kernel contained a stack-based     buffer overflow. A local attacker with access to an sg device could use this to cause a denial of service     (system crash) or possibly execute arbitrary code. (CVE-2017-7187)

    Eric Biggers discovered a memory leak in the keyring implementation in the Linux kernel. A local attacker     could use this to cause a denial of service (memory consumption). (CVE-2017-7472)

    It was discovered that a buffer overflow existed in the Broadcom FullMAC WLAN driver in the Linux kernel.
    A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary     code. (CVE-2017-7541)

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.

This update for the Linux Kernel 3.12.60-52_60 fixes one issue. The following security bug was fixed :

  - CVE-2017-5970: The ipv4_pktinfo_prepare function in     net/ipv4/ip_sockglue.c in the Linux kernel allowed     attackers to cause a denial of service (system crash)     via (1) an application that made crafted system calls or     possibly (2) IPv4 traffic with invalid IP options     (bsc#1025013).

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.

The remote Ubuntu 14.04 LTS host has a package installed that is affected by multiple vulnerabilities as referenced in the USN-3265-2 advisory.

    USN-3265-1 fixed vulnerabilities in the Linux kernel for Ubuntu 16.04 LTS. This update provides the     corresponding updates for the Linux Hardware Enablement (HWE) kernel from Ubuntu 16.04 LTS for Ubuntu     14.04 LTS.

    It was discovered that a use-after-free flaw existed in the filesystem encryption subsystem in the Linux     kernel. A local attacker could use this to cause a denial of service (system crash). (CVE-2017-7374)

    Andrey Konovalov discovered an out-of-bounds access in the IPv6 Generic Routing Encapsulation (GRE)     tunneling implementation in the Linux kernel. An attacker could use this to possibly expose sensitive     information. (CVE-2017-5897)

    Andrey Konovalov discovered that the IPv4 implementation in the Linux kernel did not properly handle     invalid IP options in some situations. An attacker could use this to cause a denial of service or possibly     execute arbitrary code. (CVE-2017-5970)

    Gareth Evans discovered that the shm IPC subsystem in the Linux kernel did not properly restrict mapping     page zero. A local privileged attacker could use this to execute arbitrary code. (CVE-2017-5669)

    Alexander Popov discovered that a race condition existed in the Stream Control Transmission Protocol     (SCTP) implementation in the Linux kernel. A local attacker could use this to cause a denial of service     (system crash). (CVE-2017-5986)

    Dmitry Vyukov discovered that the Linux kernel did not properly handle TCP packets with the URG flag. A     remote attacker could use this to cause a denial of service. (CVE-2017-6214)

    Andrey Konovalov discovered that the LLC subsytem in the Linux kernel did not properly set up a destructor     in certain situations. A local attacker could use this to cause a denial of service (system crash).
    (CVE-2017-6345)

    It was discovered that a race condition existed in the AF_PACKET handling code in the Linux kernel. A     local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary     code. (CVE-2017-6346)

    Andrey Konovalov discovered that the IP layer in the Linux kernel made improper assumptions about internal     data layout when performing checksums. A local attacker could use this to cause a denial of service     (system crash) or possibly execute arbitrary code. (CVE-2017-6347)

    Dmitry Vyukov discovered race conditions in the Infrared (IrDA) subsystem in the Linux kernel. A local     attacker could use this to cause a denial of service (deadlock). (CVE-2017-6348)

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.

According to the version of the vzkernel package and the readykernel-patch installed, the Virtuozzo installation on the remote host is affected by the following vulnerabilities :

  - A vulnerability was found in the Linux kernel where     having malicious IP options present would cause the     ipv4_pktinfo_prepare() function to drop/free the dst.
    This could result in a system crash or possible     privilege escalation.

  - A vulnerability was found in the implementation of SCTP     protocol in the Linux kernel. If the sctp module was     loaded on the host, a privileged user inside a     container could cause a kernel crash by triggering     use-after-free in the __sctp_connect() function with a     specially crafted sequence of system calls.

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

The remote Oracle Linux 6 / 7 host has packages installed that are affected by multiple vulnerabilities as referenced in the ELSA-2017-3534 advisory.

    - Revert 'fix minor infoleak in get_user_ex()' (Brian Maly)  [Orabug: 25790392]  {CVE-2016-9644}
    - net: ping: check minimum size on ICMP header length (Kees Cook)  [Orabug: 25766911]  {CVE-2016-8399}
    - ipv6: stop sending PTB packets for MTU < 1280 (Hagen Paul Pfeifer)  [Orabug: 25765776]  {CVE-2016-10142}
    - sg_write()/bsg_write() is not fit to be called under KERNEL_DS (Al Viro)  [Orabug: 25765445]     {CVE-2016-10088}
    - scsi: sg: check length passed to SG_NEXT_CMD_LEN (peter chang)  [Orabug: 25751996]  {CVE-2017-7187}
    - tty: n_hdlc: get rid of racy n_hdlc.tbuf (Alexander Popov)  [Orabug: 25696686]  {CVE-2017-2636}
    - TTY: n_hdlc, fix lockdep false positive (Jiri Slaby)  [Orabug: 25696686]  {CVE-2017-2636}
    - drivers/tty/n_hdlc.c: replace kmalloc/memset by kzalloc (Fabian Frederick)  [Orabug: 25696686]     {CVE-2017-2636}
    - x86: bpf_jit: fix compilation of large bpf programs (Alexei Starovoitov)  [Orabug: 21305080]     {CVE-2015-4700}
    - firewire: net: guard against rx buffer overflows (Stefan Richter)  [Orabug: 25451530]  {CVE-2016-8633}
    - x86/mm/32: Enable full randomization on i386 and X86_32 (Hector Marco-Gisbert)  [Orabug: 25463927]     {CVE-2016-3672}
    - x86 get_unmapped_area: Access mmap_legacy_base through mm_struct member (Radu Caragea)  [Orabug:
    25463927]  {CVE-2016-3672}
    - pptp: verify sockaddr_len in pptp_bind() and pptp_connect() (WANG Cong)  [Orabug: 25490335]     {CVE-2015-8569}
    - sg_start_req(): make sure that there's not too many elements in iovec (Al Viro)  [Orabug: 25490372]     {CVE-2015-5707}
    - kvm: nVMX: Allow L1 to intercept software exceptions (#BP and #OF) (Jim Mattson)  [Orabug: 25507195]     {CVE-2016-9588}
    - tcp: take care of truncations done by sk_filter() (Eric Dumazet)  [Orabug: 25507230]  {CVE-2016-8645}
    - rose: limit sk_filter trim to payload (Willem de Bruijn)  [Orabug: 25507230]  {CVE-2016-8645}
    - fix minor infoleak in get_user_ex() (Al Viro)  [Orabug: 25507281]  {CVE-2016-9178}
    - scsi: arcmsr: Simplify user_len checking (Borislav Petkov)  [Orabug: 25507328]  {CVE-2016-7425}
    - scsi: arcmsr: Buffer overflow in arcmsr_iop_message_xfer() (Dan Carpenter)  [Orabug: 25507328]     {CVE-2016-7425}
    - net: fix a kernel infoleak in x25 module (Kangjie Lu)  [Orabug: 25512413]  {CVE-2016-4580}
    - USB: digi_acceleport: do sanity checking for the number of ports (Oliver Neukum)  [Orabug: 25512471]     {CVE-2016-3140}
    - ipv4: keep skb->dst around in presence of IP options (Eric Dumazet)  [Orabug: 25543892]  {CVE-2017-5970}
    - net/llc: avoid BUG_ON() in skb_orphan() (Eric Dumazet)  [Orabug: 25682430]  {CVE-2017-6345}
    - dccp: fix freeing skb too early for IPV6_RECVPKTINFO (Andrey Konovalov)   {CVE-2017-6074}
    - crypto: algif_hash - Only export and import on sockets with data (Herbert Xu)  [Orabug: 25417805]     {CVE-2016-8646}
    - USB: usbfs: fix potential infoleak in devio (Kangjie Lu)  [Orabug: 25462760]  {CVE-2016-4482}
    - net: fix infoleak in llc (Kangjie Lu)  [Orabug: 25462807]  {CVE-2016-4485}
    - af_unix: Guard against other == sk in unix_dgram_sendmsg (Rainer Weikusat)  [Orabug: 25463996]     {CVE-2013-7446}
    - unix: avoid use-after-free in ep_remove_wait_queue (Rainer Weikusat)  [Orabug: 25463996]     {CVE-2013-7446}

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 4.9.10 stable kernel 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 update system website.
Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

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

CVE-2016-2188

Ralf Spenneberg of OpenSource Security reported that the iowarrior device driver did not sufficiently validate USB descriptors. This allowed a physically present user with a specially designed USB device to cause a denial of service (crash).

CVE-2016-9604

It was discovered that the keyring subsystem allowed a process to set a special internal keyring as its session keyring. The security impact in this version of the kernel is unknown.

CVE-2016-10200

Baozeng Ding and Andrey Konovalov reported a race condition in the L2TP implementation which could corrupt its table of bound sockets. A local user could use this to cause a denial of service (crash) or possibly for privilege escalation.

CVE-2017-2647 / CVE-2017-6951

idl3r reported that the keyring subsystem would allow a process to search for 'dead' keys, causing a NULL pointer dereference. A local user could use this to cause a denial of service (crash).

CVE-2017-2671

Daniel Jiang discovered a race condition in the ping socket implementation. A local user with access to ping sockets could use this to cause a denial of service (crash) or possibly for privilege escalation. This feature is not accessible to any users by default.

CVE-2017-5967

Xing Gao reported that the /proc/timer_list file showed information about all processes, not considering PID namespaces. If timer debugging was enabled by a privileged user, this leaked information to processes contained in PID namespaces.

CVE-2017-5970

Andrey Konovalov discovered a denial of service flaw in the IPv4 networking code. This can be triggered by a local or remote attacker if a local UDP or raw socket has the IP_RETOPTS option enabled.

CVE-2017-7184

Chaitin Security Research Lab discovered that the net xfrm subsystem did not sufficiently validate replay state parameters, allowing a heap buffer overflow. This can be used by a local user with the CAP_NET_ADMIN capability for privilege escalation.

CVE-2017-7261

Vladis Dronov and Murray McAllister reported that the vmwgfx driver did not sufficiently validate rendering surface parameters. In a VMware guest, this can be used by a local user to cause a denial of service (crash).

CVE-2017-7273

Benoit Camredon reported that the hid-cypress driver did not sufficiently validate HID reports. This possibly allowed a physically present user with a specially designed USB device to cause a denial of service (crash).

CVE-2017-7294

Li Qiang reported that the vmwgfx driver did not sufficiently validate rendering surface parameters. In a VMware guest, this can be used by a local user to cause a denial of service (crash) or possibly for privilege escalation.

CVE-2017-7308

Andrey Konovalov reported that the packet socket (AF_PACKET) implementation did not sufficiently validate buffer parameters. This can be used by a local user with the CAP_NET_RAW capability for privilege escalation.

CVE-2017-7472

Eric Biggers reported that the keyring subsystem allowed a thread to create new thread keyrings repeatedly, causing a memory leak. This can be used by a local user to cause a denial of service (memory exhaustion).

CVE-2017-7616

Chris Salls reported an information leak in the 32-bit big-endian compatibility implementations of set_mempolicy() and mbind(). This does not affect any architecture supported in Debian 7 LTS.

CVE-2017-7618

Sabrina Dubroca reported that the cryptographic hash subsystem does not correctly handle submission of unaligned data to a device that is already busy, resulting in infinite recursion. On some systems this can be used by local users to cause a denial of service (crash).

For Debian 7 'Wheezy', these problems have been fixed in version 3.2.88-1. This version also includes bug fixes from upstream version 3.2.88, and fixes some older security issues in the keyring, packet socket and cryptographic hash subsystems that do not have CVE IDs.

For Debian 8 'Jessie', most of these problems have been fixed in version 3.16.43-1 which will be part of the next point release.

We recommend that you upgrade your linux 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.

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

  - The perf_cpu_time_max_percent_handler function in     kernel/events/core.c in the Linux kernel before 4.11     allows local users to cause a denial of service     (integer overflow) or possibly have unspecified other     impact via a large value, as demonstrated by an     incorrect sample-rate calculation.(CVE-2017-18255)

  - In the Linux kernel before 4.13.5, a local user could     create keyrings for other users via keyctl commands,     setting unwanted defaults or causing a denial of     service.(CVE-2017-18270)

  - The timer_create syscall implementation in     kernel/time/posix-timers.c in the Linux kernel doesn't     properly validate the sigevent-i1/4zsigev_notify field,     which leads to out-of-bounds access in the show_timer     function.(CVE-2017-18344)

  - arch/x86/kvm/emulate.c in the Linux kernel through     4.9.3 allows local users to obtain sensitive     information from kernel memory or cause a denial of     service (use-after-free) via a crafted application that     leverages instruction emulation for fxrstor, fxsave,     sgdt, and sidt.(CVE-2017-2584)

  - Linux kernel built with the KVM visualization support     (CONFIG_KVM), with nested visualization(nVMX) feature     enabled(nested=1), is vulnerable to host memory leakage     issue. It could occur while emulating VMXON instruction     in 'handle_vmon'. An L1 guest user could use this flaw     to leak host memory potentially resulting in     DoS.(CVE-2017-2596)

  - A race condition flaw was found in the N_HLDC Linux     kernel driver when accessing n_hdlc.tbuf list that can     lead to double free. A local, unprivileged user able to     set the HDLC line discipline on the tty device could     use this flaw to increase their privileges on the     system.(CVE-2017-2636)

  - 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-2017-2647)

  - A race condition leading to a NULL pointer dereference     was found in the Linux kernel's Link Layer Control     implementation. A local attacker with access to ping     sockets could use this flaw to crash the     system.(CVE-2017-2671)

  - A vulnerability was found in the Linux kernel in     'tmpfs' file system. When file permissions are modified     via 'chmod' and the user is not in the owning group or     capable of CAP_FSETID, the setgid bit is cleared in     inode_change_ok(). Setting a POSIX ACL via 'setxattr'     sets the file permissions as well as the new ACL, but     doesn't clear the setgid bit in a similar way this     allows to bypass the check in 'chmod'.(CVE-2017-5551)

  - The do_shmat function in ipc/shm.c in the Linux kernel,     through 4.9.12, does not restrict the address     calculated by a certain rounding operation. This allows     privileged local users to map page zero and,     consequently, bypass a protection mechanism that exists     for the mmap system call. This is possible by making     crafted shmget and shmat system calls in a privileged     context.(CVE-2017-5669)

  - A vulnerability was found in the Linux kernel where     having malicious IP options present would cause the     ipv4_pktinfo_prepare() function to drop/free the dst.
    This could result in a system crash or possible     privilege escalation.(CVE-2017-5970)

  - It was reported that with Linux kernel, earlier than     version v4.10-rc8, an application may trigger a BUG_ON     in sctp_wait_for_sndbuf if the socket tx buffer is     full, a thread is waiting on it to queue more data, and     meanwhile another thread peels off the association     being used by the first thread.(CVE-2017-5986)

  - It was found that the original fix for CVE-2016-6786     was incomplete. There exist a race between two     concurrent sys_perf_event_open() calls when both try     and move the same pre-existing software group into a     hardware context.(CVE-2017-6001)

  - A use-after-free flaw was found in the way the Linux     kernel's Datagram Congestion Control Protocol (DCCP)     implementation freed SKB (socket buffer) resources for     a DCCP_PKT_REQUEST packet when the IPV6_RECVPKTINFO     option is set on the socket. A local, unprivileged user     could use this flaw to alter the kernel memory,     allowing them to escalate their privileges on the     system.(CVE-2017-6074)

  - A flaw was found in the Linux kernel's handling of     packets with the URG flag. Applications using the     splice() and tcp_splice_read() functionality could     allow a remote attacker to force the kernel to enter a     condition in which it could loop     indefinitely.(CVE-2017-6214)

  - The hashbin_delete function in net/irda/irqueue.c in     the Linux kernel improperly manages lock dropping,     which allows local users to cause a denial of service     (deadlock) via crafted operations on IrDA     devices.(CVE-2017-6348)

  - It was found that the code in net/sctp/socket.c in the     Linux kernel through 4.10.1 does not properly restrict     association peel-off operations during certain wait     states, which allows local users to cause a denial of     service (invalid unlock and double free) via a     multithreaded application. This vulnerability was     introduced by CVE-2017-5986 fix (commit     2dcab5984841).(CVE-2017-6353)

  - The keyring_search_aux function in     security/keys/keyring.c in the Linux kernel allows     local users to cause a denial of service via a     request_key system call for the 'dead' key     type.(CVE-2017-6951)

  - The sg_ioctl function in drivers/scsi/sg.c in the Linux     kernel allows local users to cause a denial of service     (stack-based buffer overflow) or possibly have     unspecified other impacts via a large command size in     an SG_NEXT_CMD_LEN ioctl call, leading to out-of-bounds     write access in the sg_write function.(CVE-2017-7187)

  - In was found that in the Linux kernel, in     vmw_surface_define_ioctl() function in     'drivers/gpu/drm/vmwgfx/vmwgfx_surface.c' file, a     'num_sizes' parameter is assigned a user-controlled     value which is not checked if it is zero. This is used     in a call to kmalloc() and later leads to dereferencing     ZERO_SIZE_PTR, which in turn leads to a GPF and     possibly to a kernel panic.(CVE-2017-7261)

  - An out-of-bounds write vulnerability was found in the     Linux kernel's vmw_surface_define_ioctl() function, in     the 'drivers/gpu/drm/vmwgfx/vmwgfx_surface.c' file. Due     to the nature of the flaw, privilege escalation cannot     be fully ruled out, although we believe it is     unlikely.(CVE-2017-7294)

  - It was found that the packet_set_ring() function of the     Linux kernel's networking implementation did not     properly validate certain block-size data. A local     attacker with CAP_NET_RAW capability could use this     flaw to trigger a buffer overflow, resulting in the     crash of the system. Due to the nature of the flaw,     privilege escalation cannot be fully ruled     out.(CVE-2017-7308)

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 12 GA LTSS kernel was updated to receive various security and bugfixes. The following security bugs were fixed :

  - CVE-2015-1350: The VFS subsystem in the Linux kernel     provided an incomplete set of requirements for setattr     operations that underspecifies removing extended     privilege attributes, which allowed local users to cause     a denial of service (capability stripping) via a failed     invocation of a system call, as demonstrated by using     chown to remove a capability from the ping or Wireshark     dumpcap program (bnc#914939).

  - CVE-2016-2117: The atl2_probe function in     drivers/net/ethernet/atheros/atlx/atl2.c in the Linux     kernel incorrectly enabled scatter/gather I/O, which     allowed remote attackers to obtain sensitive information     from kernel memory by reading packet data (bnc#968697).

  - CVE-2016-3070: The trace_writeback_dirty_page     implementation in include/trace/events/writeback.h in     the Linux kernel improperly interacted with     mm/migrate.c, which allowed local users to cause a     denial of service (NULL pointer dereference and system     crash) or possibly have unspecified other impact by     triggering a certain page move (bnc#979215).

  - CVE-2016-5243: The tipc_nl_compat_link_dump function in     net/tipc/netlink_compat.c in the Linux kernel did not     properly copy a certain string, which allowed local     users to obtain sensitive information from kernel stack     memory by reading a Netlink message (bnc#983212).

  - CVE-2016-7117: Use-after-free vulnerability in the
    __sys_recvmmsg function in net/socket.c in the Linux     kernel allowed remote attackers to execute arbitrary     code via vectors involving a recvmmsg system call that     is mishandled during error processing (bnc#1003077).

  - CVE-2016-9588: arch/x86/kvm/vmx.c in the Linux kernel     mismanages the #BP and #OF exceptions, which allowed     guest OS users to cause a denial of service (guest OS     crash) by declining to handle an exception thrown by an     L2 guest (bnc#1015703).

  - CVE-2016-10044: The aio_mount function in fs/aio.c in     the Linux kernel did not properly restrict execute     access, which made it easier for local users to bypass     intended SELinux W^X policy restrictions, and     consequently gain privileges, via an io_setup system     call (bnc#1023992).

  - CVE-2016-10200: Race condition in the L2TPv3 IP     Encapsulation feature in the Linux kernel allowed local     users to gain privileges or cause a denial of service     (use-after-free) by making multiple bind system calls     without properly ascertaining whether a socket has the     SOCK_ZAPPED status, related to net/l2tp/l2tp_ip.c and     net/l2tp/l2tp_ip6.c (bnc#1028415).

  - CVE-2016-10208: The ext4_fill_super function in     fs/ext4/super.c in the Linux kernel did not properly     validate meta block groups, which allowed physically     proximate attackers to cause a denial of service     (out-of-bounds read and system crash) via a crafted ext4     image (bnc#1023377).

  - CVE-2017-2671: The ping_unhash function in     net/ipv4/ping.c in the Linux kernel is too late in     obtaining a certain lock and consequently cannot ensure     that disconnect function calls are safe, which allowed     local users to cause a denial of service (panic) by     leveraging access to the protocol value of IPPROTO_ICMP     in a socket system call (bnc#1031003).

  - CVE-2017-5669: The do_shmat function in ipc/shm.c in the     Linux kernel did not restrict the address calculated by     a certain rounding operation, which allowed local users     to map page zero, and consequently bypass a protection     mechanism that exists for the mmap system call, by     making crafted shmget and shmat system calls in a     privileged context (bnc#1026914).

  - CVE-2017-5897: The ip6gre_err function in     net/ipv6/ip6_gre.c in the Linux kernel allowed remote     attackers to have unspecified impact via vectors     involving GRE flags in an IPv6 packet, which trigger an     out-of-bounds access (bnc#1023762).

  - CVE-2017-5970: The ipv4_pktinfo_prepare function in     net/ipv4/ip_sockglue.c in the Linux kernel allowed     attackers to cause a denial of service (system crash)     via (1) an application that made crafted system calls or     possibly (2) IPv4 traffic with invalid IP options     (bnc#1024938).

  - CVE-2017-5986: Race condition in the     sctp_wait_for_sndbuf function in net/sctp/socket.c in     the Linux kernel allowed local users to cause a denial     of service (assertion failure and panic) via a     multithreaded application that peels off an association     in a certain buffer-full state (bnc#1025235).

  - CVE-2017-6074: The dccp_rcv_state_process function in     net/dccp/input.c in the Linux kernel mishandled     DCCP_PKT_REQUEST packet data structures in the LISTEN     state, which allowed local users to obtain root     privileges or cause a denial of service (double free)     via an application that made an IPV6_RECVPKTINFO     setsockopt system call (bnc#1026024).

  - CVE-2017-6214: The tcp_splice_read function in     net/ipv4/tcp.c in the Linux kernel allowed remote     attackers to cause a denial of service (infinite loop     and soft lockup) via vectors involving a TCP packet with     the URG flag (bnc#1026722).

  - CVE-2017-6345: The LLC subsystem in the Linux kernel did     not ensure that a certain destructor exists in required     circumstances, which allowed local users to cause a     denial of service (BUG_ON) or possibly have unspecified     other impact via crafted system calls (bnc#1027190).

  - CVE-2017-6346: Race condition in net/packet/af_packet.c     in the Linux kernel allowed local users to cause a     denial of service (use-after-free) or possibly have     unspecified other impact via a multithreaded application     that made PACKET_FANOUT setsockopt system calls     (bnc#1027189).

  - CVE-2017-6348: The hashbin_delete function in     net/irda/irqueue.c in the Linux kernel improperly     managed lock dropping, which allowed local users to     cause a denial of service (deadlock) via crafted     operations on IrDA devices (bnc#1027178).

  - CVE-2017-6353: net/sctp/socket.c in the Linux kernel did     not properly restrict association peel-off operations     during certain wait states, which allowed local users to     cause a denial of service (invalid unlock and double     free) via a multithreaded application. NOTE: this     vulnerability exists because of an incorrect fix for     CVE-2017-5986 (bnc#1027066).

  - CVE-2017-7187: The sg_ioctl function in     drivers/scsi/sg.c in the Linux kernel allowed local     users to cause a denial of service (stack-based buffer     overflow) or possibly have unspecified other impact via     a large command size in an SG_NEXT_CMD_LEN ioctl call,     leading to out-of-bounds write access in the sg_write     function (bnc#1030213).

  - CVE-2017-7261: The vmw_surface_define_ioctl function in     drivers/gpu/drm/vmwgfx/vmwgfx_surface.c in the Linux     kernel did not check for a zero value of certain levels     data, which allowed local users to cause a denial of     service (ZERO_SIZE_PTR dereference, and GPF and possibly     panic) via a crafted ioctl call for a /dev/dri/renderD*     device (bnc#1031052).

  - CVE-2017-7294: The vmw_surface_define_ioctl function in     drivers/gpu/drm/vmwgfx/vmwgfx_surface.c in the Linux     kernel did not validate addition of certain levels data,     which allowed local users to trigger an integer overflow     and out-of-bounds write, and cause a denial of service     (system hang or crash) or possibly gain privileges, via     a crafted ioctl call for a /dev/dri/renderD* device     (bnc#1031440).

  - CVE-2017-7308: The packet_set_ring function in     net/packet/af_packet.c in the Linux kernel did not     properly validate certain block-size data, which allowed     local users to cause a denial of service (overflow) or     possibly have unspecified other impact via crafted     system calls (bnc#1031579).

  - CVE-2017-7616: Incorrect error handling in the     set_mempolicy and mbind compat syscalls in     mm/mempolicy.c in the Linux kernel allowed local users     to obtain sensitive information from uninitialized stack     data by triggering failure of a certain bitmap operation     (bnc#1033336).

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.

The remote Redhat Enterprise Linux 6 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2017:2669 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 race condition was found in the Linux kernel, present since v3.14-rc1 through v4.12. The race happens     between threads of inotify_handle_event() and vfs_rename() while running the rename operation against the     same file. As a result of the race the next slab data or the slab's free list pointer can be corrupted     with attacker-controlled data, which may lead to the privilege escalation. (CVE-2017-7533, Important)

    * It was found that the NFSv4 server in the Linux kernel did not properly validate layout type when     processing NFSv4 pNFS LAYOUTGET and GETDEVICEINFO operands. A remote attacker could use this flaw to soft-     lockup the system and thus cause denial of service. (CVE-2017-8797, Important)

    This update also fixes multiple Moderate and Low impact security issues:

    CVE-2017-8797 CVE-2015-8839 CVE-2016-9576 CVE-2016-7042 CVE-2016-7097 CVE-2016-8645 CVE-2016-9576     CVE-2016-9806 CVE-2016-10088 CVE-2017-2671 CVE-2017-5970 CVE-2017-6001 CVE-2017-6951 CVE-2017-7187     CVE-2017-7889 CVE-2017-8890 CVE-2017-9074 CVE-2017-8890 CVE-2017-9075 CVE-2017-8890 CVE-2017-9076     CVE-2017-8890 CVE-2017-9077 CVE-2016-9604 CVE-2016-9685

    Documentation for these issues are available from the Technical Notes document linked to in the References     section.

    Red Hat would like to thank Leilei Lin (Alibaba Group), Fan Wu (The University of Hong Kong), and Shixiong     Zhao (The University of Hong Kong) for reporting CVE-2017-7533 and Marco Grassi for reporting     CVE-2016-8645. The CVE-2016-7042 issue was discovered by Ondrej Kozina (Red Hat); the CVE-2016-7097 issue     was discovered by Andreas Gruenbacher (Red Hat) and Jan Kara (SUSE); the CVE-2016-9604 issue was     discovered by David Howells (Red Hat); and the CVE-2016-9685 issue was discovered by Qian Cai (Red Hat).

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 SUSE Linux Enterprise 12 SP2 kernel was updated to 4.4.49 to receive various security and bugfixes. The following security bugs were fixed :

  - CVE-2016-7117: Use-after-free vulnerability in the
    __sys_recvmmsg function in net/socket.c in the Linux     kernel allowed remote attackers to execute arbitrary     code via vectors involving a recvmmsg system call that     was mishandled during error processing (bnc#1003077).

  - CVE-2017-5576: Integer overflow in the vc4_get_bcl     function in drivers/gpu/drm/vc4/vc4_gem.c in the     VideoCore DRM driver in the Linux kernel allowed local     users to cause a denial of service or possibly have     unspecified other impact via a crafted size value in a     VC4_SUBMIT_CL ioctl call (bnc#1021294).

  - CVE-2017-5577: The vc4_get_bcl function in     drivers/gpu/drm/vc4/vc4_gem.c in the VideoCore DRM     driver in the Linux kernel did not set an errno value     upon certain overflow detections, which allowed local     users to cause a denial of service (incorrect pointer     dereference and OOPS) via inconsistent size values in a     VC4_SUBMIT_CL ioctl call (bnc#1021294).

  - CVE-2017-5551: The simple_set_acl function in     fs/posix_acl.c in the Linux kernel preserved the setgid     bit during a setxattr call involving a tmpfs filesystem,     which allowed local users to gain group privileges by     leveraging the existence of a setgid program with     restrictions on execute permissions. (bnc#1021258).

  - CVE-2017-2583: The load_segment_descriptor     implementation in arch/x86/kvm/emulate.c in the Linux     kernel improperly emulated a 'MOV SS, NULL selector'     instruction, which allowed guest OS users to cause a     denial of service (guest OS crash) or gain guest OS     privileges via a crafted application (bnc#1020602).

  - CVE-2017-2584: arch/x86/kvm/emulate.c in the Linux     kernel allowed local users to obtain sensitive     information from kernel memory or cause a denial of     service (use-after-free) via a crafted application that     leverages instruction emulation for fxrstor, fxsave,     sgdt, and sidt (bnc#1019851).

  - CVE-2015-8709: kernel/ptrace.c in the Linux kernel     mishandled uid and gid mappings, which allowed local     users to gain privileges by establishing a user     namespace, waiting for a root process to enter that     namespace with an unsafe uid or gid, and then using the     ptrace system call. NOTE: the vendor states 'there is no     kernel bug here' (bnc#1010933).

  - CVE-2016-9806: Race condition in the netlink_dump     function in net/netlink/af_netlink.c in the Linux kernel     allowed local users to cause a denial of service (double     free) or possibly have unspecified other impact via a     crafted application that made sendmsg system calls,     leading to a free operation associated with a new dump     that started earlier than anticipated (bnc#1013540).

  - CVE-2017-5897: fixed a bug in the Linux kernel IPv6     implementation which allowed remote attackers to trigger     an out-of-bounds access, leading to a denial-of-service     attack (bnc#1023762).

  - CVE-2017-5970: Fixed a possible denial-of-service that     could have been triggered by sending bad IP options on a     socket (bsc#1024938).

  - CVE-2017-5986: an application could have triggered a     BUG_ON() in sctp_wait_for_sndbuf() if the socket TX     buffer was full, a thread was waiting on it to queue     more data, and meanwhile another thread peeled off the     association being used by the first thread     (bsc#1025235).

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.

ID	Name	Product	Family	Published	Updated	Severity
102151	RHEL 7：kernel-rt (RHSA-2017:2077)	Nessus	Red Hat Local Security Checks	8/3/2017	3/24/2025	high
99163	OracleVM 3.3：Unbreakable /等 (OVMSA-2017-0057) (Dirty COW)	Nessus	OracleVM Local Security Checks	4/3/2017	5/14/2023	critical
103326	Ubuntu 14.04 LTS : Linux kernel vulnerabilities (USN-3422-1)	Nessus	Ubuntu Local Security Checks	9/19/2017	8/27/2024	high
97850	SUSE SLES12 Security Update : kernel (SUSE-SU-2017:0772-1)	Nessus	SuSE Local Security Checks	3/21/2017	1/6/2021	high
99658	Ubuntu 14.04 LTS : Linux kernel (Xenial HWE) vulnerabilities (USN-3265-2)	Nessus	Ubuntu Local Security Checks	4/25/2017	8/27/2024	critical
99732	Virtuozzo 7 : readykernel-patch (VZA-2017-032)	Nessus	Virtuozzo Local Security Checks	5/1/2017	1/4/2021	high
99160	Oracle Linux 6 / 7 : Unbreakable Enterprise kernel (ELSA-2017-3534)	Nessus	Oracle Linux Local Security Checks	4/3/2017	10/23/2024	high
97237	Fedora 25 : kernel (2017-0054c7b1f0)	Nessus	Fedora Local Security Checks	2/21/2017	1/11/2021	high
99733	Debian DLA-922-1 : linux security update	Nessus	Debian Local Security Checks	5/1/2017	1/11/2021	high
124825	EulerOS Virtualization 3.0.1.0 : kernel (EulerOS-SA-2019-1502)	Nessus	Huawei Local Security Checks	5/13/2019	5/20/2022	high
100150	SUSE SLES12 Security Update : kernel (SUSE-SU-2017:1247-1)	Nessus	SuSE Local Security Checks	5/12/2017	1/6/2021	critical
103046	RHEL 6 : kernel-rt (RHSA-2017:2669)	Nessus	Red Hat Local Security Checks	9/8/2017	4/15/2025	high
97466	SUSE SLED12 / SLES12 Security Update : kernel (SUSE-SU-2017:0575-1)	Nessus	SuSE Local Security Checks	3/1/2017	1/6/2021	critical

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