RHEL 6 : kernel (RHSA-2015:0062)

This script is Copyright (C) 2015-2017 Tenable Network Security, Inc.


Synopsis :

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

Description :

Updated kernel packages that fix multiple security issues, several
bugs, and add one enhancement are now available for Red Hat Enterprise
Linux 6.5 Extended Update Support.

Red Hat Product Security has rated this update as having Important
security impact. Common Vulnerability Scoring System (CVSS) base
scores, which give detailed severity ratings, are available for each
vulnerability from the CVE links in the References section.

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

* A flaw was found in the way the Linux kernel's SCTP implementation
handled malformed or duplicate Address Configuration Change Chunks
(ASCONF). A remote attacker could use either of these flaws to crash
the system. (CVE-2014-3673, CVE-2014-3687, Important)

* A flaw was found in the way the Linux kernel's SCTP implementation
handled the association's output queue. A remote attacker could send
specially crafted packets that would cause the system to use an
excessive amount of memory, leading to a denial of service.
(CVE-2014-3688, Important)

* A flaw was found in the way the Linux kernel's VFS subsystem handled
reference counting when performing unmount operations on symbolic
links. A local, unprivileged user could use this flaw to exhaust all
available memory on the system or, potentially, trigger a
use-after-free error, resulting in a system crash or privilege
escalation. (CVE-2014-5045, Moderate)

* An integer overflow flaw was found in the way the
lzo1x_decompress_safe() function of the Linux kernel's LZO
implementation processed Literal Runs. A local attacker could, in
extremely rare cases, use this flaw to crash the system or,
potentially, escalate their privileges on the system. (CVE-2014-4608,
Low)

Red Hat would like to thank Vasily Averin of Parallels for reporting
CVE-2014-5045, and Don A. Bailey from Lab Mouse Security for reporting
CVE-2014-4608. The CVE-2014-3673 issue was discovered by Liu Wei of
Red Hat.

This update also fixes several bugs and adds one enhancement.
Documentation for these changes is available from the Technical Notes
document linked to in the References section.

All kernel users are advised to upgrade to these updated packages,
which contain backported patches to correct these issues and add this
enhancement. The system must be rebooted for this update to take
effect.

See also :

https://www.redhat.com/security/data/cve/CVE-2014-3673.html
https://www.redhat.com/security/data/cve/CVE-2014-3687.html
https://www.redhat.com/security/data/cve/CVE-2014-3688.html
https://www.redhat.com/security/data/cve/CVE-2014-4608.html
https://www.redhat.com/security/data/cve/CVE-2014-5045.html
http://www.nessus.org/u?cfcf474c
http://rhn.redhat.com/errata/RHSA-2015-0062.html

Solution :

Update the affected packages.

Risk factor :

High / CVSS Base Score : 7.8
(CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:C)
CVSS Temporal Score : 5.8
(CVSS2#E:U/RL:OF/RC:C)
Public Exploit Available : false

Family: Red Hat Local Security Checks

Nessus Plugin ID: 80878 ()

Bugtraq ID:

CVE ID: CVE-2014-3673
CVE-2014-3687
CVE-2014-3688
CVE-2014-4608
CVE-2014-5045

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