USN-3168-1 針對 Ubuntu 14.04 LTS 修正 Linux 核心中的弱點。此更新為 Ubuntu 14.04 LTS 或 Ubuntu 12.04 LTS 中的 Linux 硬體啟用 (HWE) 核心提供對應更新。Dmitry Vyukov 發現 Linux 核心中的 KVM 實作未正確初始化某些錯誤案例中的程式碼片段 (CS)。本機攻擊者可利用此弱點洩漏敏感資訊 (核心記憶體)。(CVE-2016-9756) Andrey Konovalov 發現在處理 SO_SNDBUFFORCE 和 SO_RCVBUFFORCE 選項時，setsockopt() 系統呼叫中存在簽署的整數溢位。具有 CAP_NET_ADMIN 能力的本機攻擊者可利用此弱點造成拒絕服務 (系統當機或記憶體損毀)。(CVE-2016-9793) Baozeng Ding 發現一個爭用情形，可導致 Linux 核心的進階 Linux 音效結構 (ALSA) 子系統發生釋放後使用。本機攻擊者可利用此缺陷造成拒絕服務 (系統當機)。(CVE-2016-9794) Baozeng Ding 發現 Linux 核心中的 netlink_dump() 函式發生雙重釋放。本機攻擊者可利用此缺陷造成拒絕服務 (系統當機)。(CVE-2016-9806)。請注意，Tenable Network Security 已直接從 Ubuntu 安全性公告擷取前置描述區塊。Tenable 已盡量在不造成其他問題的前提下，嘗試自動清理並將其格式化。

遠端 Ubuntu 14.04 LTS 主機上安裝的一個套件受到 USN-3169-2 公告中所提及的多個弱點影響。

  在 4.8.12 版之前的 Linux 核心中，net/dcb/dcbnl.c 並未初始化特定結構，進而讓本機使用者透過特製的應用程式，從核心堆疊記憶體取得敏感資訊。(CVE-2016-9756)

  在 Linux 核心 4.8.14 之前版本中，net/core/sock.c 內的 sock_setsockopt 函式不當處理 sk_sndbuf 和 sk_rcvbuf 的負值，這可讓本機使用者引致拒絕服務 (記憶體損毀和系統當機)，或可能透過利用具有 (1) SO_SNDBUFFORCE 或 (2) SO_RCVBUFFORCE 選項的特製 setsockopt 系統呼叫的 CAP_NET_ADMIN 功能，造成其他不明影響。
    (CVE-2016-9793)

  在 4.7 之前的 Linux 內核的 ALSA子系統中， sound/core/pcm_lib.c  的 snd_pcm_period_elapsed 函式允許本機使用者透過特製的 SNDRV_PCM_TRIGGER_START 命令，引致拒絕服務 (釋放後使用)或者可能造成其他不明影響。(CVE-2016-9794)

請注意，Nessus 並未測試這些問題，而是僅依據應用程式自我報告的版本號碼作出判斷。

在 Linux 核心中發現數個弱點，這些弱點可能會導致權限提升、拒絕服務或資訊洩漏。CVE-2012-6704、CVE-2016-9793 Eric Dumazet 發現具有 CAP_NET_ADMIN 能力的本機使用者可將通訊端的緩衝區大小設為負值，會導致拒絕服務或其他安全性影響。此外在 3.5 之前的核心版本中，如果 sysctl net.core.rmem_max 變更為極大值，所有使用者皆可做到這點。CVE-2015-1350 / #770492 Ben Harris 報告本機使用者可以從他們看得到的所有檔案中移除 set-capability 屬性，導致發生拒絕服務。CVE-2015-8962 Calvin Owens 發現若在透過 SCSI 通用 (sg) 驅動程式存取 SCSI 裝置時將該裝置移除，可能會造成拒絕服務 (當機或記憶體損毀) 或權限提升問題。有權存取 SCSI 裝置節點的本機使用者可惡意利用此問題。CVE-2015-8963 Sasha Levin 報告熱插拔 CPU 會造成效能事件 (perf) 子系統出現釋放後使用錯誤，進而可能導致拒絕服務 (當機或記憶體損毀) 或權限提升。任何本機使用者均可惡意利用此弱點。CVE-2015-8964 發現終端/串列 (tty) 子系統在終端行原則變更時，並未可靠地重設終端緩衝區狀態。可存取終端裝置的本機使用者可藉此讀取核心記憶體的敏感資訊。CVE-2016-7097 Jan Kara 發現變更檔案的 POSIX ACL 未能清除檔案的 set-group-ID 旗標，如果執行變更的使用者並非群組擁有者成員，旗標本應清除。有時候這會造成擁有可執行檔的使用者可藉此取得群組擁有者的權限。CVE-2016-7910 Vegard Nossum 發現在處理讀取 /proc/diskstats 或 /proc/partitions 時會發生記憶體配置失敗，可能會導致釋放後使用，可能會造成拒絕服務 (當機或記憶體損毀) 或權限提升。CVE-2016-7911 Dmitry Vyukov 報告 ioprio_get() 和 ioprio_set() 系統呼叫之間的爭用情形會造成釋放後使用，可能會導致拒絕服務 (當機) 或洩漏敏感資訊。CVE-2016-7915 Benjamin Tissoires 發現 HID 裝置可能會在 HID 核心中觸發超出邊界記憶體存取。實際存在的使用者可利用此問題造成拒絕服務 (當機) 或洩漏敏感資訊。CVE-2016-8399 Qidan He 報告 IPv4 ping 通訊端實作並未驗證傳送封包的長度。有權使用 ping 通訊端的使用者可藉此造成超出邊界讀取，進而可能導致拒絕服務或資訊洩漏。但是，Debian 系統上的使用者依預設並不具備建立 ping 通訊端的權限。CVE-2016-8633 Eyal Itkin 報告 IP-over-Firewire 驅動程式 (firewire-net) 並未驗證連結層片段標頭的位移或長度。Firewire 連接的遠端系統可藉此在封包緩衝區之後寫入記憶體，導致拒絕服務 (當機) 或執行遠端程式碼。CVE-2016-8645 Marco Grassi 報告如果 TCP 通訊端的附加通訊端篩選器 (BPF 程式) 截斷或移除 TCP 標頭，可能會造成拒絕服務 (當機)。任何本機使用者均可惡意利用此弱點。CVE-2016-8655 Philip Pettersson 發現封包通訊端的實作 (AF_PACKET 家族) 存在啟用傳輸通道緩衝區和變更已使用緩衝區版本之間的爭用情形，可能會造成釋放後使用錯誤。具有 CAP_NET_ADMIN 能力的本機使用者可利用此問題提升權限。CVE-2016-9178 Al Viro 發現無法讀取使用者記憶體中的資料可能導致 x86 架構 (amd64 或 i386) 發生資訊洩漏。CVE-2016-9555 Andrey Konovalov 報告 SCTP 實作並未及早驗證「出乎預料」封包的區塊長度。遠端攻擊者可利用此問題，造成使用 SCTP 的系統發生拒絕服務 (當機) 或有其他安全性影響。CVE-2016-9576、CVE-2016-10088 Dmitry Vyukov 報告 splice() 函式與 SCSI 通用驅動程式合用會導致核心記憶體損毀。有權存取 SCSI 裝置節點的本機使用者可惡意利用此弱點執行權限提升。CVE-2016-9756 Dmitry Vyukov 報告 x86 架構 (amd64 或 i386) KVM 未正確處理特定指示的失敗情況，該指示要求在舊版處理器上進行軟體模擬。客戶機系統可藉此惡意利用此問題，造成洩漏敏感資訊或拒絕服務 (記錄垃圾郵件)。CVE-2016-9794 Baozeng Ding 報告 ALSA (音效) 子系統中存在爭用情形，會造成釋放後使用錯誤。有權存取 PCM 音效裝置的本機使用者可惡意利用此問題，造成拒絕服務 (當機或記憶體損毀) 或其他安全性影響。針對 Debian 7「Wheezy」，這些問題已在 3.2.84-1 版本中修正。此版本亦包含上游版本 3.2.84 的修正，且將 PREEMPT_RT 功能群組更新至 3.2.84-rt122 版本。最後，此版本藉由停用無權限使用者的使用權，在效能事件 (perf) 子系統中加入降低安全性問題風險的選項。其作法為設定 sysctl kernel.perf_event_paranoid=3。針對 Debian 8「Jessie」，這些問題已在 3.16.39-1 版本中修正，其內含在即將發行的下一個重點版本 (8.6).中。建議您升級 linux 套件。注意：Tenable Network Security 已直接從 DLA 安全性公告擷取前置描述區塊。Tenable 已盡量在不造成其他問題的前提下，嘗試自動清理並將其格式化。

The 4.8.12 stable update contains a number of important fixes across the tree.

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

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

  - arch/x86/kvm/emulate.c in the Linux kernel before 4.8.12 does not properly initialize Code Segment (CS) in     certain error cases, which allows local users to obtain sensitive information from kernel stack memory via     a crafted application. (CVE-2016-9756)

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

The remote OracleVM system is missing necessary patches to address critical security updates :

  - Revert 'x86/mm: Expand the exception table logic to     allow new handling options' (Brian Maly) [Orabug:
    25790387] (CVE-2016-9644)

  - Revert 'fix minor infoleak in get_user_ex' (Brian Maly)     [Orabug: 25790387] (CVE-2016-9644)

  - x86/mm: Expand the exception table logic to allow new     handling options (Tony Luck) [Orabug: 25790387]     (CVE-2016-9644)

  - rebuild bumping release

  - net: ping: check minimum size on ICMP header length     (Kees Cook) [Orabug: 25766898] (CVE-2016-8399)     (CVE-2016-8399)

  - sg_write/bsg_write is not fit to be called under     KERNEL_DS (Al Viro) [Orabug: 25765436] (CVE-2016-10088)

  - scsi: sg: check length passed to SG_NEXT_CMD_LEN (peter     chang) [Orabug: 25751984] (CVE-2017-7187)

  - tty: n_hdlc: get rid of racy n_hdlc.tbuf (Alexander     Popov) [Orabug: 25696677] (CVE-2017-2636)

  - TTY: n_hdlc, fix lockdep false positive (Jiri Slaby)     [Orabug: 25696677] (CVE-2017-2636)

  - If Slot Status indicates changes in both Data Link Layer     Status and Presence Detect, prioritize the Link status     change. (Jack Vogel) 

  - PCI: pciehp: Leave power indicator on when enabling     already-enabled slot (Ashok Raj) [Orabug: 25353783]

  - firewire: net: guard against rx buffer overflows (Stefan     Richter) [Orabug: 25451520] (CVE-2016-8633)

  - usbnet: cleanup after bind in probe (Oliver Neukum)     [Orabug: 25463898] (CVE-2016-3951)

  - cdc_ncm: do not call usbnet_link_change from     cdc_ncm_bind (Bj&oslash rn Mork) [Orabug: 25463898]     (CVE-2016-3951)

  - cdc_ncm: Add support for moving NDP to end of NCM frame     (Enrico Mioso) [Orabug: 25463898] (CVE-2016-3951)

  - x86/mm/32: Enable full randomization on i386 and X86_32     (Hector Marco-Gisbert) [Orabug: 25463918]     (CVE-2016-3672)

  - kvm: fix page struct leak in handle_vmon (Paolo Bonzini)     [Orabug: 25507133] (CVE-2017-2596)

  - crypto: mcryptd - Check mcryptd algorithm compatibility     (tim) [Orabug: 25507153] (CVE-2016-10147)

  - kvm: nVMX: Allow L1 to intercept software exceptions     (#BP and #OF) (Jim Mattson) [Orabug: 25507188]     (CVE-2016-9588)

  - KVM: x86: drop error recovery in em_jmp_far and     em_ret_far (Radim Kr&#x10D m&aacute &#x159 ) [Orabug:
    25507213] (CVE-2016-9756)

  - tcp: take care of truncations done by sk_filter (Eric     Dumazet) [Orabug: 25507226] (CVE-2016-8645)

  - rose: limit sk_filter trim to payload (Willem de Bruijn)     [Orabug: 25507226] (CVE-2016-8645)

  - tipc: check minimum bearer MTU (Michal Kube&#x10D ek)     [Orabug: 25507239] (CVE-2016-8632) (CVE-2016-8632)

  - fix minor infoleak in get_user_ex (Al Viro) [Orabug:
    25507269] (CVE-2016-9178)

  - scsi: arcmsr: Simplify user_len checking (Borislav     Petkov) [Orabug: 25507319] (CVE-2016-7425)

  - scsi: arcmsr: Buffer overflow in arcmsr_iop_message_xfer     (Dan Carpenter) [Orabug: 25507319] (CVE-2016-7425)

  - tmpfs: clear S_ISGID when setting posix ACLs (Gu Zheng)     [Orabug: 25507341] (CVE-2016-7097) (CVE-2016-7097)

  - posix_acl: Clear SGID bit when setting file permissions     (Jan Kara) [Orabug: 25507341] (CVE-2016-7097)     (CVE-2016-7097)

  - ext2: convert to mbcache2 (Jan Kara) [Orabug: 25512366]     (CVE-2015-8952)

  - ext4: convert to mbcache2 (Jan Kara) [Orabug: 25512366]     (CVE-2015-8952)

  - mbcache2: reimplement mbcache (Jan Kara) [Orabug:
    25512366] (CVE-2015-8952)

  - USB: digi_acceleport: do sanity checking for the number     of ports (Oliver Neukum) [Orabug: 25512466]     (CVE-2016-3140)

  - net/llc: avoid BUG_ON in skb_orphan (Eric Dumazet)     [Orabug: 25682419] (CVE-2017-6345)

  - net/mlx4_core: Disallow creation of RAW QPs on a VF (Eli     Cohen) 

  - ipv4: keep skb->dst around in presence of IP options     (Eric Dumazet) [Orabug: 25698300] (CVE-2017-5970)

  - perf/core: Fix concurrent sys_perf_event_open vs.
    'move_group' race (Peter Zijlstra) [Orabug: 25698751]     (CVE-2017-6001)

  - ip6_gre: fix ip6gre_err invalid reads (Eric Dumazet)     [Orabug: 25699015] (CVE-2017-5897)

  - mpt3sas: Don't spam logs if logging level is 0 (Johannes     Thumshirn) 

  - xen-netfront: cast grant table reference first to type     int (Dongli Zhang)

  - xen-netfront: do not cast grant table reference to     signed short (Dongli Zhang)

USN-3168-1 fixed vulnerabilities in the Linux kernel for Ubuntu 14.04 LTS. This update provides the corresponding updates for the Linux Hardware Enablement (HWE) kernel from Ubuntu 14.04 LTS for Ubuntu 12.04 LTS.

Dmitry Vyukov discovered that the KVM implementation in the Linux kernel did not properly initialize the Code Segment (CS) in certain error cases. A local attacker could use this to expose sensitive information (kernel memory). (CVE-2016-9756)

Andrey Konovalov discovered that signed integer overflows existed in the setsockopt() system call when handling the SO_SNDBUFFORCE and SO_RCVBUFFORCE options. A local attacker with the CAP_NET_ADMIN capability could use this to cause a denial of service (system crash or memory corruption). (CVE-2016-9793)

Baozeng Ding discovered a race condition that could lead to a use-after- free in the Advanced Linux Sound Architecture (ALSA) subsystem of the Linux kernel. A local attacker could use this to cause a denial of service (system crash). (CVE-2016-9794)

Baozeng Ding discovered a double free in the netlink_dump() function in the Linux kernel. A local attacker could use this to cause a denial of service (system crash). (CVE-2016-9806).

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

The remote Ubuntu 14.04 LTS host has a package installed that is affected by multiple vulnerabilities as referenced in the USN-3169-2 advisory.

    USN-3169-1 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.

    Dmitry Vyukov discovered that the KVM implementation in the Linux kernel did not properly initialize the     Code Segment (CS) in certain error cases. A local attacker could use this to expose sensitive information     (kernel memory). (CVE-2016-9756)

    Andrey Konovalov discovered that signed integer overflows existed in the setsockopt() system call when     handling the SO_SNDBUFFORCE and SO_RCVBUFFORCE options. A local attacker with the CAP_NET_ADMIN capability     could use this to cause a denial of service (system crash or memory corruption). (CVE-2016-9793)

    Baozeng Ding discovered a race condition that could lead to a use-after- free in the Advanced Linux Sound     Architecture (ALSA) subsystem of the Linux kernel. A local attacker could use this to cause a denial of     service (system crash). (CVE-2016-9794)

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.

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

CVE-2012-6704, CVE-2016-9793

Eric Dumazet found that a local user with CAP_NET_ADMIN capability could set a socket's buffer size to be negative, leading to a denial of service or other security impact. Additionally, in kernel versions prior to 3.5, any user could do this if sysctl net.core.rmem_max was changed to a very large value.

CVE-2015-1350 / #770492

Ben Harris reported that local users could remove set-capability attributes from any file visible to them, allowing a denial of service.

CVE-2015-8962

Calvin Owens fouund that removing a SCSI device while it was being accessed through the SCSI generic (sg) driver led to a double- free, possibly causing a denial of service (crash or memory corruption) or privilege escalation. This could be exploited by local users with permision to access a SCSI device node.

CVE-2015-8963

Sasha Levin reported that hot-unplugging a CPU resulted in a use-after-free by the performance events (perf) subsystem, possibly causing a denial of service (crash or memory corruption) or privilege escalation. This could by exploited by any local user.

CVE-2015-8964

It was found that the terminal/serial (tty) subsystem did not reliably reset the terminal buffer state when the terminal line discipline was changed. This could allow a local user with access to a terminal device to read sensitive information from kernel memory.

CVE-2016-7097

Jan Kara found that changing the POSIX ACL of a file never cleared its set-group-ID flag, which should be done if the user changing it is not a member of the group-owner. In some cases, this would allow the user-owner of an executable to gain the privileges of the group-owner.

CVE-2016-7910

Vegard Nossum discovered that a memory allocation failure while handling a read of /proc/diskstats or /proc/partitions could lead to a use-after-free, possibly causing a denial of service (crash or memory corruption) or privilege escalation.

CVE-2016-7911

Dmitry Vyukov reported that a race between ioprio_get() and ioprio_set() system calls could result in a use-after-free, possibly causing a denial of service (crash) or leaking sensitive information.

CVE-2016-7915

Benjamin Tissoires found that HID devices could trigger an out-of- bounds memory access in the HID core. A physically present user could possibly use this for denial of service (crash) or to leak sensitive information.

CVE-2016-8399

Qidan He reported that the IPv4 ping socket implementation did not validate the length of packets to be sent. A user with permisson to use ping sockets could cause an out-of-bounds read, possibly resulting in a denial of service or information leak. However, on Debian systems no users have permission to create ping sockets by default.

CVE-2016-8633

Eyal Itkin reported that the IP-over-Firewire driver (firewire-net) did not validate the offset or length in link-layer fragmentation headers. This allowed a remote system connected by Firewire to write to memory after a packet buffer, leading to a denial of service (crash) or remote code execution.

CVE-2016-8645

Marco Grassi reported that if a socket filter (BPF program) attached to a TCP socket truncates or removes the TCP header, this could cause a denial of service (crash). This was exploitable by any local user.

CVE-2016-8655

Philip Pettersson found that the implementation of packet sockets (AF_PACKET family) had a race condition between enabling a transmit ring buffer and changing the version of buffers used, which could result in a use-after-free. A local user with the CAP_NET_ADMIN capability could exploit this for privilege escalation.

CVE-2016-9178

Al Viro found that a failure to read data from user memory might lead to a information leak on the x86 architecture (amd64 or i386).

CVE-2016-9555

Andrey Konovalov reported that the SCTP implementation does not validate 'out of the blue' packet chunk lengths early enough. A remote system able could use this to cause a denial of service (crash) or other security impact for systems using SCTP.

CVE-2016-9576, CVE-2016-10088

Dmitry Vyukov reported that using splice() with the SCSI generic driver led to kernel memory corruption. Local users with permision to access a SCSI device node could exploit this for privilege escalation.

CVE-2016-9756

Dmitry Vyukov reported that KVM for the x86 architecture (amd64 or i386) did not correctly handle the failure of certain instructions that require software emulation on older processors. This could be exploited by guest systems to leak sensitive information or for denial of service (log spam).

CVE-2016-9794

Baozeng Ding reported a race condition in the ALSA (sound) subsystem that could result in a use-after-free. Local users with access to a PCM sound device could exploit this for denial of service (crash or memory corruption) or other security impact.

For Debian 7 'Wheezy', these problems have been fixed in version 3.2.84-1. This version also includes bug fixes from upstream version 3.2.84 and updates the PREEMPT_RT featureset to version 3.2.84-rt122.
Finally, this version adds the option to mitigate security issues in the performance events (perf) subsystem by disabling use by unprivileged users. This can be done by setting sysctl kernel.perf_event_paranoid=3.

For Debian 8 'Jessie', these problems have been fixed in version 3.16.39-1 which will be included in the next point release (8.6).

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.

The SUSE Linux Enterprise 12 GA LTSS kernel was updated to 3.12.61 to receive various security and bugfixes. The following feature was implemented :

  - The ext2 filesystem got reenabled and supported to allow     support for 'XIP' (Execute In Place) (FATE#320805). The     following security bugs were fixed :

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

  - CVE-2016-7097: The filesystem implementation in the     Linux kernel preserved the setgid bit during a setxattr     call, which allowed local users to gain group privileges     by leveraging the existence of a setgid program with     restrictions on execute permissions (bnc#995968).

  - CVE-2017-2583: A Linux kernel built with the     Kernel-based Virtual Machine (CONFIG_KVM) support was     vulnerable to an incorrect segment selector(SS) value     error. A user/process inside guest could have used this     flaw to crash the guest resulting in DoS or potentially     escalate their privileges inside guest. (bsc#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-2016-10088: The sg implementation in the Linux     kernel did not properly restrict write operations in     situations where the KERNEL_DS option is set, which     allowed local users to read or write to arbitrary kernel     memory locations or cause a denial of service     (use-after-free) by leveraging access to a /dev/sg     device, related to block/bsg.c and drivers/scsi/sg.c.
    NOTE: this vulnerability exists because of an incomplete     fix for CVE-2016-9576 (bnc#1017710).

  - CVE-2016-8645: The TCP stack in the Linux kernel     mishandled skb truncation, which allowed local users to     cause a denial of service (system crash) via a crafted     application that made sendto system calls, related to     net/ipv4/tcp_ipv4.c and net/ipv6/tcp_ipv6.c     (bnc#1009969).

  - CVE-2016-8399: An elevation of privilege vulnerability     in the kernel networking subsystem could enable a local     malicious application to execute arbitrary code within     the context of the kernel. This issue is rated as     Moderate because it first requires compromising a     privileged process and current compiler optimizations     restrict access to the vulnerable code. Product:
    Android. Versions: Kernel-3.10, Kernel-3.18. Android ID:
    A-31349935 (bnc#1014746).

  - 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-2016-9756: arch/x86/kvm/emulate.c in the Linux     kernel did not properly initialize Code Segment (CS) in     certain error cases, which allowed local users to obtain     sensitive information from kernel stack memory via a     crafted application (bnc#1013038).

  - CVE-2016-9793: The sock_setsockopt function in     net/core/sock.c in the Linux kernel mishandled negative     values of sk_sndbuf and sk_rcvbuf, which allowed local     users to cause a denial of service (memory corruption     and system crash) or possibly have unspecified other     impact by leveraging the CAP_NET_ADMIN capability for a     crafted setsockopt system call with the (1)     SO_SNDBUFFORCE or (2) SO_RCVBUFFORCE option     (bnc#1013531).

  - CVE-2016-7910: Use-after-free vulnerability in the     disk_seqf_stop function in block/genhd.c in the Linux     kernel allowed local users to gain privileges by     leveraging the execution of a certain stop operation     even if the corresponding start operation had failed     (bnc#1010716).

  - CVE-2015-8962: Double free vulnerability in the     sg_common_write function in drivers/scsi/sg.c in the     Linux kernel allowed local users to gain privileges or     cause a denial of service (memory corruption and system     crash) by detaching a device during an SG_IO ioctl call     (bnc#1010501).

  - CVE-2016-7913: The xc2028_set_config function in     drivers/media/tuners/tuner-xc2028.c in the Linux kernel     allowed local users to gain privileges or cause a denial     of service (use-after-free) via vectors involving     omission of the firmware name from a certain data     structure (bnc#1010478).

  - CVE-2016-7911: Race condition in the get_task_ioprio     function in block/ioprio.c in the Linux kernel allowed     local users to gain privileges or cause a denial of     service (use-after-free) via a crafted ioprio_get system     call (bnc#1010711).

  - CVE-2015-8964: The tty_set_termios_ldisc function in     drivers/tty/tty_ldisc.c in the Linux kernel allowed     local users to obtain sensitive information from kernel     memory by reading a tty data structure (bnc#1010507).

  - CVE-2015-8963: Race condition in kernel/events/core.c in     the Linux kernel allowed local users to gain privileges     or cause a denial of service (use-after-free) by     leveraging incorrect handling of an swevent data     structure during a CPU unplug operation (bnc#1010502).

  - CVE-2016-7914: The assoc_array_insert_into_terminal_node     function in lib/assoc_array.c in the Linux kernel did     not check whether a slot is a leaf, which allowed local     users to obtain sensitive information from kernel memory     or cause a denial of service (invalid pointer     dereference and out-of-bounds read) via an application     that uses associative-array data structures, as     demonstrated by the keyutils test suite (bnc#1010475).

  - CVE-2016-8633: drivers/firewire/net.c in the Linux     kernel allowed remote attackers to execute arbitrary     code via crafted fragmented packets (bnc#1008833).

  - CVE-2016-9083: drivers/vfio/pci/vfio_pci.c in the Linux     kernel allowed local users to bypass integer overflow     checks, and cause a denial of service (memory     corruption) or have unspecified other impact, by     leveraging access to a vfio PCI device file for a     VFIO_DEVICE_SET_IRQS ioctl call, aka a 'state machine     confusion bug (bnc#1007197).

  - CVE-2016-9084: drivers/vfio/pci/vfio_pci_intrs.c in the     Linux kernel misused the kzalloc function, which allowed     local users to cause a denial of service (integer     overflow) or have unspecified other impact by leveraging     access to a vfio PCI device file (bnc#1007197).

  - CVE-2016-7042: The proc_keys_show function in     security/keys/proc.c in the Linux kernel uses an     incorrect buffer size for certain timeout data, which     allowed local users to cause a denial of service (stack     memory corruption and panic) by reading the /proc/keys     file (bnc#1004517).

  - CVE-2015-8956: The rfcomm_sock_bind function in     net/bluetooth/rfcomm/sock.c in the Linux kernel allowed     local users to obtain sensitive information or cause a     denial of service (NULL pointer dereference) via vectors     involving a bind system call on a Bluetooth RFCOMM     socket (bnc#1003925).

  - CVE-2016-8658: Stack-based buffer overflow in the     brcmf_cfg80211_start_ap function in     drivers/net/wireless/broadcom/brcm80211/brcmfmac/cfg8021     1.c in the Linux kernel allowed local users to cause a     denial of service (system crash) or possibly have     unspecified other impact via a long SSID Information     Element in a command to a Netlink socket (bnc#1004462).

  - CVE-2016-7425: The arcmsr_iop_message_xfer function in     drivers/scsi/arcmsr/arcmsr_hba.c in the Linux kernel did     not restrict a certain length field, which allowed local     users to gain privileges or cause a denial of service     (heap-based buffer overflow) via an     ARCMSR_MESSAGE_WRITE_WQBUFFER control code (bnc#999932).

  - CVE-2016-6327: drivers/infiniband/ulp/srpt/ib_srpt.c in     the Linux kernel allowed local users to cause a denial     of service (NULL pointer dereference and system crash)     by using an ABORT_TASK command to abort a device write     operation (bnc#994748).

  - CVE-2016-6828: The tcp_check_send_head function in     include/net/tcp.h in the Linux kernel did not properly     maintain certain SACK state after a failed data copy,     which allowed local users to cause a denial of service     (tcp_xmit_retransmit_queue use-after-free and system     crash) via a crafted SACK option (bnc#994296).

  - CVE-2016-5696: net/ipv4/tcp_input.c in the Linux kernel     did not properly determine the rate of challenge ACK     segments, which made it easier for remote attackers to     hijack TCP sessions via a blind in-window attack     (bnc#989152).

  - CVE-2016-6130: Race condition in the sclp_ctl_ioctl_sccb     function in drivers/s390/char/sclp_ctl.c in the Linux     kernel allowed local users to obtain sensitive     information from kernel memory by changing a certain     length value, aka a 'double fetch' vulnerability     (bnc#987542).

  - CVE-2016-6480: Race condition in the ioctl_send_fib     function in drivers/scsi/aacraid/commctrl.c in the Linux     kernel allowed local users to cause a denial of service     (out-of-bounds access or system crash) by changing a     certain size value, aka a 'double fetch' vulnerability     (bnc#991608).

  - CVE-2016-4998: The IPT_SO_SET_REPLACE setsockopt     implementation in the netfilter subsystem in the Linux     kernel allowed local users to cause a denial of service     (out-of-bounds read) or possibly obtain sensitive     information from kernel heap memory by leveraging     in-container root access to provide a crafted offset     value that leads to crossing a ruleset blob boundary     (bnc#986362 bnc#986365).

  - CVE-2016-5828: The start_thread function in     arch/powerpc/kernel/process.c in the Linux kernel on     powerpc platforms mishandled transactional state, which     allowed local users to cause a denial of service     (invalid process state or TM Bad Thing exception, and     system crash) or possibly have unspecified other impact     by starting and suspending a transaction before an exec     system call (bnc#986569).

  - CVE-2014-9904: The snd_compress_check_input function in     sound/core/compress_offload.c in the ALSA subsystem in     the Linux kernel did not properly check for an integer     overflow, which allowed local users to cause a denial of     service (insufficient memory allocation) or possibly     have unspecified other impact via a crafted     SNDRV_COMPRESS_SET_PARAMS ioctl call (bnc#986811).

  - CVE-2016-5829: Multiple heap-based buffer overflows in     the hiddev_ioctl_usage function in     drivers/hid/usbhid/hiddev.c in the Linux kernel allow     local users to cause a denial of service or possibly     have unspecified other impact via a crafted (1)     HIDIOCGUSAGES or (2) HIDIOCSUSAGES ioctl call     (bnc#986572).

  - CVE-2016-4470: The key_reject_and_link function in     security/keys/key.c in the Linux kernel did not ensure     that a certain data structure is initialized, which     allowed local users to cause a denial of service (system     crash) via vectors involving a crafted keyctl request2     command (bnc#984755).

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	名称	产品	系列	发布时间	最近更新时间	严重程度
96438	Ubuntu 12.04 LTS：linux-lts-trusty 弱點 (USN-3168-2)	Nessus	Ubuntu Local Security Checks	2017/1/12	2023/1/12	high
96440	Ubuntu 14.04 LTS：Linux 核心 (Xenial HWE) 弱點 (USN-3169-2)	Nessus	Ubuntu Local Security Checks	2017/1/12	2024/8/27	high
96188	Debian DLA-772-1：linux 安全性更新	Nessus	Debian Local Security Checks	2017/1/3	2021/1/11	critical
95680	Fedora 23 : kernel (2016-9c17cb9648)	Nessus	Fedora Local Security Checks	2016/12/12	2021/1/11	high
220305	Linux Distros Unpatched Vulnerability : CVE-2016-9756	Nessus	Misc.	2025/3/4	2025/9/5	medium
99162	OracleVM 3.4 : Unbreakable / etc (OVMSA-2017-0056)	Nessus	OracleVM Local Security Checks	2017/4/3	2021/1/4	critical
96438	Ubuntu 12.04 LTS : linux-lts-trusty vulnerabilities (USN-3168-2)	Nessus	Ubuntu Local Security Checks	2017/1/12	2023/1/12	high
96440	Ubuntu 14.04 LTS : Linux kernel (Xenial HWE) vulnerabilities (USN-3169-2)	Nessus	Ubuntu Local Security Checks	2017/1/12	2024/8/27	high
96188	Debian DLA-772-1 : linux security update	Nessus	Debian Local Security Checks	2017/1/3	2021/1/11	critical
97205	SUSE SLES12 Security Update : kernel (SUSE-SU-2017:0471-1)	Nessus	SuSE Local Security Checks	2017/2/16	2021/1/6	high

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