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

  - CVE-2017-15649: net/packet/af_packet.c in the Linux     kernel allowed local users to gain privileges via     crafted system calls that trigger mishandling of     packet_fanout data structures, because of a race     condition (involving fanout_add and packet_do_bind) that     leads to a use-after-free, a different vulnerability     than CVE-2017-6346 (bnc#1064388).

  - CVE-2015-9004: kernel/events/core.c in the Linux kernel     mishandled counter grouping, which allowed local users     to gain privileges via a crafted application, related to     the perf_pmu_register and perf_event_open functions     (bnc#1037306).

  - CVE-2016-10229: udp.c in the Linux kernel allowed remote     attackers to execute arbitrary code via UDP traffic that     triggers an unsafe second checksum calculation during     execution of a recv system call with the MSG_PEEK flag     (bnc#1032268).

  - CVE-2016-9604: The handling of keyrings starting with     '.' in KEYCTL_JOIN_SESSION_KEYRING, which could have     allowed local users to manipulate privileged keyrings,     was fixed (bsc#1035576)

  - CVE-2017-1000363: Linux drivers/char/lp.c Out-of-Bounds     Write. Due to a missing bounds check, and the fact that     parport_ptr integer is static, a 'secure boot' kernel     command line adversary (can happen due to bootloader     vulns, e.g. Google Nexus 6's CVE-2016-10277, where due     to a vulnerability the adversary has partial control     over the command line) can overflow the parport_nr array     in the following code, by appending many (>LP_NO)     'lp=none' arguments to the command line (bnc#1039456).

  - CVE-2017-1000365: The Linux Kernel imposes a size     restriction on the arguments and environmental strings     passed through RLIMIT_STACK/RLIM_INFINITY (1/4 of the     size), but did not take the argument and environment     pointers into account, which allowed attackers to bypass     this limitation. (bnc#1039354).

  - CVE-2017-1000380: sound/core/timer.c in the Linux kernel     is vulnerable to a data race in the ALSA /dev/snd/timer     driver resulting in local users being able to read     information belonging to other users, i.e.,     uninitialized memory contents may be disclosed when a     read and an ioctl happen at the same time (bnc#1044125).

  - CVE-2017-10661: Race condition in fs/timerfd.c in the     Linux kernel allowed local users to gain privileges or     cause a denial of service (list corruption or     use-after-free) via simultaneous file-descriptor     operations that leverage improper might_cancel queueing     (bnc#1053152).

  - CVE-2017-11176: The mq_notify function in the Linux     kernel did not set the sock pointer to NULL upon entry     into the retry logic. During a user-space close of a     Netlink socket, it allowed attackers to cause a denial     of service (use-after-free) or possibly have unspecified     other impact (bnc#1048275).

  - CVE-2017-12153: A security flaw was discovered in the     nl80211_set_rekey_data() function in     net/wireless/nl80211.c in the Linux kernel This function     did not check whether the required attributes are     present in a Netlink request. This request can be issued     by a user with the CAP_NET_ADMIN capability and may     result in a NULL pointer dereference and system crash     (bnc#1058410).

  - CVE-2017-12154: The prepare_vmcs02 function in     arch/x86/kvm/vmx.c in the Linux kernel did not ensure     that the 'CR8-load exiting' and 'CR8-store exiting' L0     vmcs02 controls exist in cases where L1 omits the 'use     TPR shadow' vmcs12 control, which allowed KVM L2 guest     OS users to obtain read and write access to the hardware     CR8 register (bnc#1058507).

  - CVE-2017-12762: In /drivers/isdn/i4l/isdn_net.c: A     user-controlled buffer is copied into a local buffer of     constant size using strcpy without a length check which     can cause a buffer overflow. (bnc#1053148).

  - CVE-2017-13080: Wi-Fi Protected Access (WPA and WPA2)     allowed reinstallation of the Group Temporal Key (GTK)     during the group key handshake, allowing an attacker     within radio range to replay frames from access points     to clients (bnc#1063667).

  - CVE-2017-14051: An integer overflow in the     qla2x00_sysfs_write_optrom_ctl function in     drivers/scsi/qla2xxx/qla_attr.c in the Linux kernel     allowed local users to cause a denial of service (memory     corruption and system crash) by leveraging root access     (bnc#1056588).

  - CVE-2017-14106: The tcp_disconnect function in     net/ipv4/tcp.c in the Linux kernel allowed local users     to cause a denial of service (__tcp_select_window     divide-by-zero error and system crash) by triggering a     disconnect within a certain tcp_recvmsg code path     (bnc#1056982).

  - CVE-2017-14140: The move_pages system call in     mm/migrate.c in the Linux kernel doesn't check the     effective uid of the target process, enabling a local     attacker to learn the memory layout of a setuid     executable despite ASLR (bnc#1057179).

  - CVE-2017-15265: Use-after-free vulnerability in the     Linux kernel allowed local users to have unspecified     impact via vectors related to /dev/snd/seq     (bnc#1062520).

  - CVE-2017-15274: security/keys/keyctl.c in the Linux     kernel did not consider the case of a NULL payload in     conjunction with a nonzero length value, which allowed     local users to cause a denial of service (NULL pointer     dereference and OOPS) via a crafted add_key or keyctl     system call, a different vulnerability than     CVE-2017-12192 (bnc#1045327).

  - CVE-2017-2647: The KEYS subsystem in the Linux kernel     allowed local users to gain privileges or cause a denial     of service (NULL pointer dereference and system crash)     via vectors involving a NULL value for a certain match     field, related to the keyring_search_iterator function     in keyring.c (bnc#1030593).

  - CVE-2017-6951: The keyring_search_aux function in     security/keys/keyring.c in the Linux kernel allowed     local users to cause a denial of service (NULL pointer     dereference and OOPS) via a request_key system call for     the 'dead' type (bnc#1029850).

  - CVE-2017-7482: A potential memory corruption was fixed     in decoding of krb5 principals in the kernels kerberos     handling. (bnc#1046107).

  - CVE-2017-7487: The ipxitf_ioctl function in     net/ipx/af_ipx.c in the Linux kernel mishandled     reference counts, which allowed local users to cause a     denial of service (use-after-free) or possibly have     unspecified other impact via a failed SIOCGIFADDR ioctl     call for an IPX interface (bnc#1038879).

  - CVE-2017-7518: The Linux kernel was vulnerable to an     incorrect debug exception(#DB) error. It could occur     while emulating a syscall instruction and potentially     lead to guest privilege escalation. (bsc#1045922).

  - CVE-2017-7541: The brcmf_cfg80211_mgmt_tx function in     drivers/net/wireless/broadcom/brcm80211/brcmfmac/cfg8021     1.c in the Linux kernel allowed local users to cause a     denial of service (buffer overflow and system crash) or     possibly gain privileges via a crafted NL80211_CMD_FRAME     Netlink packet (bnc#1049645).

  - CVE-2017-7542: The ip6_find_1stfragopt function in     net/ipv6/output_core.c in the Linux kernel allowed local     users to cause a denial of service (integer overflow and     infinite loop) by leveraging the ability to open a raw     socket (bnc#1049882).

  - CVE-2017-7889: The mm subsystem in the Linux kernel did     not properly enforce the CONFIG_STRICT_DEVMEM protection     mechanism, which allowed local users to read or write to     kernel memory locations in the first megabyte (and     bypass slab-allocation access restrictions) via an     application that opens the /dev/mem file, related to     arch/x86/mm/init.c and drivers/char/mem.c (bnc#1034405).

  - CVE-2017-8106: The handle_invept function in     arch/x86/kvm/vmx.c in the Linux kernel 3.12 allowed     privileged KVM guest OS users to cause a denial of     service (NULL pointer dereference and host OS crash) via     a single-context INVEPT instruction with a NULL EPT     pointer (bnc#1035877).

  - CVE-2017-8831: The saa7164_bus_get function in     drivers/media/pci/saa7164/saa7164-bus.c in the Linux     kernel allowed local users to cause a denial of service     (out-of-bounds array access) or possibly have     unspecified other impact by changing a certain     sequence-number value, aka a 'double fetch'     vulnerability (bnc#1037994).

  - CVE-2017-8890: The inet_csk_clone_lock function in     net/ipv4/inet_connection_sock.c in the Linux kernel     allowed attackers to cause a denial of service (double     free) or possibly have unspecified other impact by     leveraging use of the accept system call (bnc#1038544).

  - CVE-2017-8924: The edge_bulk_in_callback function in     drivers/usb/serial/io_ti.c in the Linux kernel allowed     local users to obtain sensitive information (in the     dmesg ringbuffer and syslog) from uninitialized kernel     memory by using a crafted USB device (posing as an io_ti     USB serial device) to trigger an integer underflow     (bnc#1037182 bsc#1038982).

  - CVE-2017-8925: The omninet_open function in     drivers/usb/serial/omninet.c in the Linux kernel allowed     local users to cause a denial of service (tty     exhaustion) by leveraging reference count mishandling     (bnc#1037183 bsc#1038981).

  - CVE-2017-9074: The IPv6 fragmentation implementation in     the Linux kernel did not consider that the nexthdr field     may be associated with an invalid option, which allowed     local users to cause a denial of service (out-of-bounds     read and BUG) or possibly have unspecified other impact     via crafted socket and send system calls (bnc#1039882).

  - CVE-2017-9075: The sctp_v6_create_accept_sk function in     net/sctp/ipv6.c in the Linux kernel mishandled     inheritance, which allowed local users to cause a denial     of service or possibly have unspecified other impact via     crafted system calls, a related issue to CVE-2017-8890     (bnc#1039883).

  - CVE-2017-9076: The dccp_v6_request_recv_sock function in     net/dccp/ipv6.c in the Linux kernel mishandled     inheritance, which allowed local users to cause a denial     of service or possibly have unspecified other impact via     crafted system calls, a related issue to CVE-2017-8890     (bnc#1039885).

  - CVE-2017-9077: The tcp_v6_syn_recv_sock function in     net/ipv6/tcp_ipv6.c in the Linux kernel mishandled     inheritance, which allowed local users to cause a denial     of service or possibly have unspecified other impact via     crafted system calls, a related issue to CVE-2017-8890     (bnc#1040069).

  - CVE-2017-9242: The __ip6_append_data function in     net/ipv6/ip6_output.c in the Linux kernel is too late in     checking whether an overwrite of an skb data structure     may occur, which allowed local users to cause a denial     of service (system crash) via crafted system calls     (bnc#1041431).

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 OracleVM system is missing necessary patches to address critical security updates : please see Oracle VM Security Advisory OVMSA-2017-0126 for details.

Security Fix(es) :

  - An use-after-free flaw was found in the Linux kernel     which enables a race condition in the L2TPv3 IP     Encapsulation feature. A local user could use this flaw     to escalate their privileges or crash the system.
    (CVE-2016-10200, Important)

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

The remote Redhat Enterprise Linux 6 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2018:1854 advisory.

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

    Security Fix(es):

    * An industry-wide issue was found in the way many modern microprocessor designs have implemented     speculative execution of Load & Store instructions (a commonly used performance optimization). It relies     on the presence of a precisely-defined instruction sequence in the privileged code as well as the fact     that memory read from address to which a recent memory write has occurred may see an older value and     subsequently cause an update into the microprocessor's data cache even for speculatively executed     instructions that never actually commit (retire). As a result, an unprivileged attacker could use this     flaw to read privileged memory by conducting targeted cache side-channel attacks. (CVE-2018-3639, PowerPC)

    * kernel: net/packet: overflow in check for priv area size (CVE-2017-7308)

    * kernel: AIO interface didn't use rw_verify_area() for checking mandatory locking on files and size of     access (CVE-2012-6701)

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

    * kernel: Null pointer dereference via keyctl (CVE-2016-8650)

    * kernel: ping socket / AF_LLC connect() sin_family race (CVE-2017-2671)

    * kernel: Race condition between multiple sys_perf_event_open() calls (CVE-2017-6001)

    * kernel: Incorrect error handling in the set_mempolicy and mbind compat syscalls in mm/mempolicy.c     (CVE-2017-7616)

    * kernel: mm subsystem does not properly enforce the CONFIG_STRICT_DEVMEM protection mechanism     (CVE-2017-7889)

    * kernel: Double free in the inet_csk_clone_lock function in net/ipv4/inet_connection_sock.c     (CVE-2017-8890)

    * kernel: net: sctp_v6_create_accept_sk function mishandles inheritance (CVE-2017-9075)

    * kernel: net: IPv6 DCCP implementation mishandles inheritance (CVE-2017-9076)

    * kernel: net: tcp_v6_syn_recv_sock function mishandles inheritance (CVE-2017-9077)

    * kernel: memory leak when merging buffers in SCSI IO vectors (CVE-2017-12190)

    * kernel: vfs: BUG in truncate_inode_pages_range() and fuse client (CVE-2017-15121)

    * kernel: Race condition in drivers/md/dm.c:dm_get_from_kobject() allows local users to cause a denial of     service (CVE-2017-18203)

    * kernel: a null pointer dereference in net/dccp/output.c:dccp_write_xmit() leads to a system crash     (CVE-2018-1130)

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

    For more details about the security issue(s), including the impact, a CVSS score, and other related     information, refer to the CVE page(s) listed in the References section.

    Red Hat would like to thank Ken Johnson (Microsoft Security Response Center) and Jann Horn (Google Project     Zero) for reporting CVE-2018-3639; Vitaly Mayatskih for reporting CVE-2017-12190; and Evgenii Shatokhin     (Virtuozzo Team) for reporting CVE-2018-1130. The CVE-2017-15121 issue was discovered by Miklos Szeredi     (Red Hat).

    Additional Changes:

    For detailed information on changes in this release, see the Red Hat Enterprise Linux 6.10 Release Notes     and Red Hat Enterprise Linux 6.10 Technical Notes linked from the References section.

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.

An update for kernel is now available for Red Hat Enterprise Linux 6.

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) :

* An industry-wide issue was found in the way many modern microprocessor designs have implemented speculative execution of Load & Store instructions (a commonly used performance optimization). It relies on the presence of a precisely-defined instruction sequence in the privileged code as well as the fact that memory read from address to which a recent memory write has occurred may see an older value and subsequently cause an update into the microprocessor's data cache even for speculatively executed instructions that never actually commit (retire). As a result, an unprivileged attacker could use this flaw to read privileged memory by conducting targeted cache side-channel attacks. (CVE-2018-3639, PowerPC)

* kernel: net/packet: overflow in check for priv area size (CVE-2017-7308)

* kernel: AIO interface didn't use rw_verify_area() for checking mandatory locking on files and size of access (CVE-2012-6701)

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

* kernel: NULL pointer dereference via keyctl (CVE-2016-8650)

* kernel: ping socket / AF_LLC connect() sin_family race (CVE-2017-2671)

* kernel: Race condition between multiple sys_perf_event_open() calls (CVE-2017-6001)

* kernel: Incorrect error handling in the set_mempolicy and mbind compat syscalls in mm/mempolicy.c (CVE-2017-7616)

* kernel: mm subsystem does not properly enforce the CONFIG_STRICT_DEVMEM protection mechanism (CVE-2017-7889)

* kernel: Double free in the inet_csk_clone_lock function in net/ipv4/ inet_connection_sock.c (CVE-2017-8890)

* kernel: net: sctp_v6_create_accept_sk function mishandles inheritance (CVE-2017-9075)

* kernel: net: IPv6 DCCP implementation mishandles inheritance (CVE-2017-9076)

* kernel: net: tcp_v6_syn_recv_sock function mishandles inheritance (CVE-2017-9077)

* kernel: memory leak when merging buffers in SCSI IO vectors (CVE-2017-12190)

* kernel: vfs: BUG in truncate_inode_pages_range() and fuse client (CVE-2017-15121)

* kernel: Race condition in drivers/md/dm.c:dm_get_from_kobject() allows local users to cause a denial of service (CVE-2017-18203)

* kernel: a NULL pointer dereference in net/dccp/output.c:dccp_write_xmit() leads to a system crash (CVE-2018-1130)

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

For more details about the security issue(s), including the impact, a CVSS score, and other related information, refer to the CVE page(s) listed in the References section.

Red Hat would like to thank Ken Johnson (Microsoft Security Response Center) and Jann Horn (Google Project Zero) for reporting CVE-2018-3639; Vitaly Mayatskih for reporting CVE-2017-12190; and Evgenii Shatokhin (Virtuozzo Team) for reporting CVE-2018-1130. The CVE-2017-15121 issue was discovered by Miklos Szeredi (Red Hat).

Additional Changes :

For detailed information on changes in this release, see the Red Hat Enterprise Linux 6.10 Release Notes and Red Hat Enterprise Linux 6.10 Technical Notes linked from the References section.

ID	Name	Product	Family	Published	Updated	Severity
104374	SUSE SLES12 Security Update : kernel (SUSE-SU-2017:2920-1) (KRACK) (Stack Clash)	Nessus	SuSE Local Security Checks	11/3/2017	1/6/2021	critical
102064	OracleVM 3.4 : Unbreakable / etc (OVMSA-2017-0126) (Stack Clash)	Nessus	OracleVM Local Security Checks	7/31/2017	1/4/2021	critical
102645	Scientific Linux Security Update : kernel on SL7.x x86_64 (20170801)	Nessus	Scientific Linux Local Security Checks	8/22/2017	1/14/2021	high
110600	RHEL 6 : kernel (RHSA-2018:1854)	Nessus	Red Hat Local Security Checks	6/19/2018	4/15/2025	high
110645	CentOS 6 : kernel (CESA-2018:1854) (Spectre)	Nessus	CentOS Local Security Checks	6/22/2018	9/17/2024	high
110701	Oracle Linux 6 : kernel (ELSA-2018-1854)	Nessus	Oracle Linux Local Security Checks	6/27/2018	10/22/2024	high

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