RHEL 6 : kernel-rt (RHSA-2016:1341)

High Nessus Plugin ID 91872

Synopsis

The remote Red Hat host is missing one or more security updates.

Description

An update for kernel-rt is now available for Red Hat Enterprise MRG 2.5.

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-rt package contain the Linux kernel, the core of any Linux operating system.

This update provides a build of the kernel-rt package for Red Hat Enterprise MRG 2.5 that is layered on Red Hat Enterprise Linux 6, and provides a number of bug fixes including :

* [netdrv] ixgbevf: fix spoofed packets with random MAC and use ether_addr_copy instead of memcpy * [mm] mmu_notifier: fix memory corruption * [mm] hugetlbfs: optimize when NUMA=n * [mm] optimize put_mems_allowed() usage * [x86] mm: suitable memory should go to ZONE_MOVABLE * [fs] xfs: fix splice/direct-IO deadlock * [acpi] tables: Add acpi_subtable_proc to ACPI table parsers * [acpi] table:
Add new function to get table entries * [net] ipv6: Nonlocal bind * [net] ipv4: bind ip_nonlocal_bind to current netns

(BZ#1332298)

Security Fix(es) :

* A flaw was found in the way certain interfaces of the Linux kernel's Infiniband subsystem used write() as bi-directional ioctl() replacement, which could lead to insufficient memory security checks when being invoked using the splice() system call. A local unprivileged user on a system with either Infiniband hardware present or RDMA Userspace Connection Manager Access module explicitly loaded, could use this flaw to escalate their privileges on the system.
(CVE-2016-4565, Important)

* A race condition flaw was found in the way the Linux kernel's SCTP implementation handled sctp_accept() during the processing of heartbeat timeout events. A remote attacker could use this flaw to prevent further connections to be accepted by the SCTP server running on the system, resulting in a denial of service. (CVE-2015-8767, Moderate)

* A flaw was found in the way the realtime kernel processed specially crafted ICMP echo requests. A remote attacker could use this flaw to trigger a sysrql function based on values in the ICMP packet, allowing them to remotely restart the system. Note that this feature is not enabled by default and requires elevated privileges to be configured.
(CVE-2016-3707, Moderate)

Red Hat would like to thank Jann Horn for reporting CVE-2016-4565.

Bug Fix(es) :

* An oops can occur in the hpsa driver while submitting ioaccel2 commands when the phys_disk pointer is NULL (in hpsa_scsi_ioaccel_raid_map). Configuration changes during I/O operations could set the phys_disk pointer to NULL. In this case, send the command down the RAID path for correct processing, avoiding the oops. (BZ#1334260)

* A faulty code merge left an extra spin_lock operation in the function fscache_invalidate_write(). The code has been correctly updated to remove this extra lock operation, which avoids a potential deadlock situation when looping through cache pages. (BZ#1327730)

Solution

Update the affected packages.

See Also

https://www.redhat.com/security/data/cve/CVE-2015-8767.html

https://www.redhat.com/security/data/cve/CVE-2016-3707.html

https://www.redhat.com/security/data/cve/CVE-2016-4565.html

http://rhn.redhat.com/errata/RHSA-2016-1341.html

Plugin Details

Severity: High

ID: 91872

File Name: redhat-RHSA-2016-1341.nasl

Version: $Revision: 2.4 $

Type: local

Agent: unix

Published: 2016/06/28

Modified: 2017/01/10

Dependencies: 12634

Risk Information

Risk Factor: High

CVSSv2

Base Score: 7.2

Temporal Score: 5.3

Vector: CVSS2#AV:L/AC:L/Au:N/C:C/I:C/A:C

Temporal Vector: CVSS2#E:U/RL:OF/RC:C

CVSSv3

Base Score: 8.1

Temporal Score: 7.1

Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

CPE: p-cpe:/a:redhat:enterprise_linux:kernel-rt, p-cpe:/a:redhat:enterprise_linux:kernel-rt-debug, p-cpe:/a:redhat:enterprise_linux:kernel-rt-debug-debuginfo, p-cpe:/a:redhat:enterprise_linux:kernel-rt-debug-devel, p-cpe:/a:redhat:enterprise_linux:kernel-rt-debuginfo, p-cpe:/a:redhat:enterprise_linux:kernel-rt-debuginfo-common-x86_64, p-cpe:/a:redhat:enterprise_linux:kernel-rt-devel, p-cpe:/a:redhat:enterprise_linux:kernel-rt-doc, p-cpe:/a:redhat:enterprise_linux:kernel-rt-firmware, p-cpe:/a:redhat:enterprise_linux:kernel-rt-trace, p-cpe:/a:redhat:enterprise_linux:kernel-rt-trace-debuginfo, p-cpe:/a:redhat:enterprise_linux:kernel-rt-trace-devel, p-cpe:/a:redhat:enterprise_linux:kernel-rt-vanilla, p-cpe:/a:redhat:enterprise_linux:kernel-rt-vanilla-debuginfo, p-cpe:/a:redhat:enterprise_linux:kernel-rt-vanilla-devel, cpe:/o:redhat:enterprise_linux:6

Required KB Items: Host/local_checks_enabled, Host/RedHat/release, Host/RedHat/rpm-list, Host/cpu

Exploit Available: false

Exploit Ease: No known exploits are available

Patch Publication Date: 2016/06/27

Reference Information

CVE: CVE-2015-8767, CVE-2016-3707, CVE-2016-4565

RHSA: 2016:1341