This update for the Linux Kernel 3.12.74-60_64_57 fixes several issues. The following security issues were fixed :

  - CVE-2018-3646: Local attackers in virtualized guest     systems could use speculative code patterns on     hyperthreaded processors to read data present in the L1     Datacache used by other hyperthreads on the same CPU     core, potentially leaking sensitive data, even from     other virtual machines or the host system (bsc#1099306).

  - CVE-2017-11600: net/xfrm/xfrm_policy.c did not ensure     that the dir value of xfrm_userpolicy_id is     XFRM_POLICY_MAX or less, which allowed local users to     cause a denial of service (out-of-bounds access) or     possibly have unspecified other impact via an     XFRM_MSG_MIGRATE xfrm Netlink message (bsc#1096564)

  - CVE-2018-10853: A flaw was found in kvm. In which     certain instructions such as sgdt/sidt call     segmented_write_std didn't propagate access correctly.
    As such, during userspace induced exception, the guest     can incorrectly assume that the exception happened in     the kernel and panic. (bsc#1097108).

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 7 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2019:2029 advisory.

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

    Security Fix(es):

    * Kernel: vhost_net: infinite loop while receiving packets leads to DoS (CVE-2019-3900)

    * Kernel: page cache side channel attacks (CVE-2019-5489)

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

    * kernel: l2tp: Race condition between pppol2tp_session_create() and l2tp_eth_create() (CVE-2018-9517)

    * kernel: kvm: guest userspace to guest kernel write (CVE-2018-10853)

    * kernel: use-after-free Read in vhost_transport_send_pkt (CVE-2018-14625)

    * kernel: use-after-free in ucma_leave_multicast in drivers/infiniband/core/ucma.c (CVE-2018-14734)

    * kernel: Mishandling of indirect calls weakens Spectre mitigation for paravirtual guests (CVE-2018-15594)

    * kernel: TLB flush happens too late on mremap (CVE-2018-18281)

    * kernel: Heap address information leak while using L2CAP_GET_CONF_OPT (CVE-2019-3459)

    * kernel: Heap address information leak while using L2CAP_PARSE_CONF_RSP (CVE-2019-3460)

    * kernel: denial of service vector through vfio DMA mappings (CVE-2019-3882)

    * kernel: fix race condition between mmget_not_zero()/get_task_mm() and core dumping (CVE-2019-11599)

    * kernel: a NULL pointer dereference in drivers/scsi/megaraid/megaraid_sas_base.c leading to DoS     (CVE-2019-11810)

    * kernel: fs/ext4/extents.c leads to information disclosure (CVE-2019-11833)

    * kernel: Information exposure in fd_locked_ioctl function in drivers/block/floppy.c (CVE-2018-7755)

    * kernel: Memory leak in drivers/net/wireless/mac80211_hwsim.c:hwsim_new_radio_nl() can lead to potential     denial of service (CVE-2018-8087)

    * kernel: HID: debug: Buffer overflow in hid_debug_events_read() in drivers/hid/hid-debug.c     (CVE-2018-9516)

    * kernel: Integer overflow in the alarm_timer_nsleep function (CVE-2018-13053)

    * kernel: NULL pointer dereference in lookup_slow function (CVE-2018-13093)

    * kernel: NULL pointer dereference in xfs_da_shrink_inode function (CVE-2018-13094)

    * kernel: NULL pointer dereference in fs/xfs/libxfs/xfs_inode_buf.c (CVE-2018-13095)

    * kernel: Information leak in cdrom_ioctl_drive_status (CVE-2018-16658)

    * kernel: out-of-bound read in memcpy_fromiovecend() (CVE-2018-16885)

    * Kernel: KVM: leak of uninitialized stack contents to guest (CVE-2019-7222)

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

    Additional Changes:

    For detailed information on changes in this release, see the Red Hat Enterprise Linux 7.7 Release 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 7.

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

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

Security Fix(es) :

* Kernel: vhost_net: infinite loop while receiving packets leads to DoS (CVE-2019-3900)

* Kernel: page cache side channel attacks (CVE-2019-5489)

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

* kernel: l2tp: Race condition between pppol2tp_session_create() and l2tp_eth_create() (CVE-2018-9517)

* kernel: kvm: guest userspace to guest kernel write (CVE-2018-10853)

* kernel: use-after-free Read in vhost_transport_send_pkt (CVE-2018-14625)

* kernel: use-after-free in ucma_leave_multicast in drivers/infiniband/core/ ucma.c (CVE-2018-14734)

* kernel: Mishandling of indirect calls weakens Spectre mitigation for paravirtual guests (CVE-2018-15594)

* kernel: TLB flush happens too late on mremap (CVE-2018-18281)

* kernel: Heap address information leak while using L2CAP_GET_CONF_OPT (CVE-2019-3459)

* kernel: Heap address information leak while using L2CAP_PARSE_CONF_RSP (CVE-2019-3460)

* kernel: denial of service vector through vfio DMA mappings (CVE-2019-3882)

* kernel: fix race condition between mmget_not_zero()/get_task_mm() and core dumping (CVE-2019-11599)

* kernel: a NULL pointer dereference in drivers/scsi/megaraid/ megaraid_sas_base.c leading to DoS (CVE-2019-11810)

* kernel: fs/ext4/extents.c leads to information disclosure (CVE-2019-11833)

* kernel: Information exposure in fd_locked_ioctl function in drivers/block/ floppy.c (CVE-2018-7755)

* kernel: Memory leak in drivers/net/wireless/ mac80211_hwsim.c:hwsim_new_radio_nl() can lead to potential denial of service (CVE-2018-8087)

* kernel: HID: debug: Buffer overflow in hid_debug_events_read() in drivers/ hid/hid-debug.c (CVE-2018-9516)

* kernel: Integer overflow in the alarm_timer_nsleep function (CVE-2018-13053)

* kernel: NULL pointer dereference in lookup_slow function (CVE-2018-13093)

* kernel: NULL pointer dereference in xfs_da_shrink_inode function (CVE-2018-13094)

* kernel: NULL pointer dereference in fs/xfs/libxfs/xfs_inode_buf.c (CVE-2018-13095)

* kernel: Information leak in cdrom_ioctl_drive_status (CVE-2018-16658)

* kernel: out-of-bound read in memcpy_fromiovecend() (CVE-2018-16885)

* Kernel: KVM: leak of uninitialized stack contents to guest (CVE-2019-7222)

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

Additional Changes :

For detailed information on changes in this release, see the Red Hat Enterprise Linux 7.7 Release Notes linked from the References section.

ID	Name	Product	Family	Published	Updated	Severity
111826	SUSE SLES12 Security Update : kernel (SUSE-SU-2018:2355-1) (Foreshadow)	Nessus	SuSE Local Security Checks	8/17/2018	8/19/2024	high
127650	RHEL 7 : kernel (RHSA-2019:2029)	Nessus	Red Hat Local Security Checks	8/12/2019	11/6/2024	high
128651	CentOS 7 : kernel (CESA-2019:2029)	Nessus	CentOS Local Security Checks	9/11/2019	12/5/2022	high

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