The __get_user_asm_ex macro in arch/x86/include/asm/uaccess.h in the Linux kernel 4.4.22 through 4.4.28 contains extended asm statements that are incompatible with the exception table, which allows local users to obtain root access on non-SMEP platforms via a crafted application. NOTE: this vulnerability exists because of incorrect backporting of the CVE-2016-9178 patch to older kernels.

The remote OracleVM system is missing necessary patches to address critical security updates : please see Oracle VM Security Advisory OVMSA-2017-0145 for details.

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

  - nfsd: stricter decoding of write-like NFSv2/v3 ops (J.
    Bruce Fields) [Orabug: 25986990] (CVE-2017-7895)

  - fnic: Update fnic driver version to 1.6.0.24 (John     Sobecki) [Orabug: 24448585]

  - xen-netfront: Rework the fix for Rx stall during OOM and     network stress (Dongli Zhang) [Orabug: 25450703]

  - xen-netfront: Fix Rx stall during network stress and OOM     (Dongli Zhang) [Orabug: 25450703]

  - ipv6: Skip XFRM lookup if dst_entry in socket cache is     valid (Jakub Sitnicki)

  - uek-rpm: enable CONFIG_KSPLICE. (Jamie Iles) [Orabug:
    25549809]

  - ksplice: add sysctls for determining Ksplice features.
    (Jamie Iles) 

  - signal: protect SIGNAL_UNKILLABLE from unintentional     clearing. (Jamie Iles) [Orabug: 25549809]

  - VSOCK: Fix lockdep issue. (Dongli Zhang) [Orabug:
    25559937]

  - VSOCK: sock_put wasn't safe to call in interrupt context     (Dongli Zhang) [Orabug: 25559937]

  - IB/CORE: sync the resouce access in fmr_pool (Wengang     Wang) [Orabug: 25677469]

  - KVM: x86: fix emulation of 'MOV SS, null selector'     (Paolo Bonzini) [Orabug: 25719675] (CVE-2017-2583)     (CVE-2017-2583)

  - ext4: validate s_first_meta_bg at mount time (Eryu Guan)     [Orabug: 25719738] (CVE-2016-10208)

  - sctp: avoid BUG_ON on sctp_wait_for_sndbuf (Marcelo     Ricardo Leitner) [Orabug: 25719810] (CVE-2017-5986)

  - tcp: avoid infinite loop in tcp_splice_read (Eric     Dumazet) [Orabug: 25720813] (CVE-2017-6214)

  - lpfc cannot establish connection with targets that send     PRLI under P2P mode (Joe Jin) [Orabug: 25759083]

  - USB: visor: fix null-deref at probe (Johan Hovold)     [Orabug: 25796594] (CVE-2016-2782)

  - ipc/shm: Fix shmat mmap nil-page protection (Davidlohr     Bueso) [Orabug: 25797012] (CVE-2017-5669)

  - vhost: actually track log eventfd file     (Marc-Andr&eacute  Lureau) [Orabug: 25797052]     (CVE-2015-6252)

  - xfrm_user: validate XFRM_MSG_NEWAE incoming ESN size     harder (Andy Whitcroft) [Orabug: 25814663]     (CVE-2017-7184)

  - xfrm_user: validate XFRM_MSG_NEWAE XFRMA_REPLAY_ESN_VAL     replay_window (Andy Whitcroft) [Orabug: 25814663]     (CVE-2017-7184)

  - KEYS: Remove key_type::match in favour of overriding     default by match_preparse (Aniket Alshi) [Orabug:
    25823962] (CVE-2017-2647) (CVE-2017-2647)

  - USB: whiteheat: fix potential null-deref at probe (Johan     Hovold) [Orabug: 25825105] (CVE-2015-5257)     (CVE-2015-5257)

  - udf: Check path length when reading symlink (Jan Kara)     [Orabug: 25871102] (CVE-2015-9731)

  - udp: properly support MSG_PEEK with truncated buffers     (Eric Dumazet) [Orabug: 25876655] (CVE-2016-10229)

  - block: fix use-after-free in seq file (Vegard Nossum)     [Orabug: 25877530] (CVE-2016-7910)

  - 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)

The remote OracleVM system is missing necessary patches to address critical security updates : please see Oracle VM Security Advisory OVMSA-2017-0057 for details.

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)

The remote Ubuntu 16.04 LTS host has a package installed that is affected by multiple vulnerabilities as referenced in the USN-3161-4 advisory.

    Tilman Schmidt and Sasha Levin discovered a use-after-free condition in the TTY implementation in the     Linux kernel. A local attacker could use this to expose sensitive information (kernel memory).
    (CVE-2015-8964)

    It was discovered that the Video For Linux Two (v4l2) implementation in the Linux kernel did not properly     handle multiple planes when processing a VIDIOC_DQBUF ioctl(). A local attacker could use this to cause a     denial of service (system crash) or possibly execute arbitrary code. (CVE-2016-4568)

    CAI Qian discovered that shared bind mounts in a mount namespace exponentially added entries without     restriction to the Linux kernel's mount table. A local attacker could use this to cause a denial of     service (system crash). (CVE-2016-6213)

    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)

    Marco Grassi discovered that the driver for Areca RAID Controllers in the Linux kernel did not properly     validate control messages. A local attacker could use this to cause a denial of service (system crash) or     possibly gain privileges. (CVE-2016-7425)

    It was discovered that the KVM implementation for x86/x86_64 in the Linux kernel could dereference a null     pointer. An attacker in a guest virtual machine could use this to cause a denial of service (system crash)     in the KVM host. (CVE-2016-8630)

    Eyal Itkin discovered that the IP over IEEE 1394 (FireWire) implementation in the Linux kernel contained a     buffer overflow when handling fragmented packets. A remote attacker could use this to possibly execute     arbitrary code with administrative privileges. (CVE-2016-8633)

    Marco Grassi discovered that the TCP implementation in the Linux kernel mishandles socket buffer (skb)     truncation. A local attacker could use this to cause a denial of service (system crash). (CVE-2016-8645)

    Daxing Guo discovered a stack-based buffer overflow in the Broadcom IEEE802.11n FullMAC driver in the     Linux kernel. A local attacker could use this to cause a denial of service (system crash) or possibly gain     privileges. (CVE-2016-8658)

    Andrey Konovalov discovered that the SCTP implementation in the Linux kernel improperly handled validation     of incoming data. A remote attacker could use this to cause a denial of service (system crash).
    (CVE-2016-9555)

    It was discovered that the __get_user_asm_ex implementation in the Linux kernel for x86/x86_64 contained     extended asm statements that were incompatible with the exception table. A local attacker could use this     to gain administrative privileges. (CVE-2016-9644)

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

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

The remote Ubuntu 14.04 LTS host has a package installed that is affected by multiple vulnerabilities as referenced in the USN-3146-2 advisory.

    USN-3146-1 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 the __get_user_asm_ex implementation in the Linux kernel for x86/x86_64 contained     extended asm statements that were incompatible with the exception table. A local attacker could use this     to gain administrative privileges. (CVE-2016-9644)

    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)

    Marco Grassi discovered that the driver for Areca RAID Controllers in the Linux kernel did not properly     validate control messages. A local attacker could use this to cause a denial of service (system crash) or     possibly gain privileges. (CVE-2016-7425)

    Daxing Guo discovered a stack-based buffer overflow in the Broadcom IEEE802.11n FullMAC driver in the     Linux kernel. A local attacker could use this to cause a denial of service (system crash) or possibly gain     privileges. (CVE-2016-8658)

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 16.04 LTS host has a package installed that is affected by multiple vulnerabilities as referenced in the USN-3146-1 advisory.

    It was discovered that the __get_user_asm_ex implementation in the Linux kernel for x86/x86_64 contained     extended asm statements that were incompatible with the exception table. A local attacker could use this     to gain administrative privileges. (CVE-2016-9644)

    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)

    Marco Grassi discovered that the driver for Areca RAID Controllers in the Linux kernel did not properly     validate control messages. A local attacker could use this to cause a denial of service (system crash) or     possibly gain privileges. (CVE-2016-7425)

    Daxing Guo discovered a stack-based buffer overflow in the Broadcom IEEE802.11n FullMAC driver in the     Linux kernel. A local attacker could use this to cause a denial of service (system crash) or possibly gain     privileges. (CVE-2016-8658)

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.

ID	Name	Product	Family	Severity
102774	OracleVM 3.4 : Unbreakable / etc (OVMSA-2017-0145) (Stack Clash)	Nessus	OracleVM Local Security Checks	critical
100237	OracleVM 3.3 : Unbreakable / etc (OVMSA-2017-0105)	Nessus	OracleVM Local Security Checks	critical
99163	OracleVM 3.3 : Unbreakable / etc (OVMSA-2017-0057) (Dirty COW)	Nessus	OracleVM Local Security Checks	critical
99162	OracleVM 3.4 : Unbreakable / etc (OVMSA-2017-0056)	Nessus	OracleVM Local Security Checks	critical
95998	Ubuntu 16.04 LTS : Linux kernel (Qualcomm Snapdragon) vulnerabilities (USN-3161-4)	Nessus	Ubuntu Local Security Checks	critical
95433	Ubuntu 14.04 LTS : Linux kernel (Xenial HWE) vulnerabilities (USN-3146-2)	Nessus	Ubuntu Local Security Checks	high
95432	Ubuntu 16.04 LTS : Linux kernel vulnerabilities (USN-3146-1)	Nessus	Ubuntu Local Security Checks	high

Detections

Analytics

CVE-2016-9644

high

Tenable Plugins

critical

critical

critical

critical

critical

high

high