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The remote Red Hat host is missing one or more security updates.
Updated kernel packages that fix multiple security issues and several
bugs are now available for Red Hat Enterprise Linux 6.4 Extended
The Red Hat Security Response Team 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
* A flaw was found in the way the Linux kernel's IPv6 implementation
handled certain UDP packets when the UDP Fragmentation Offload (UFO)
feature was enabled. A remote attacker could use this flaw to crash
the system or, potentially, escalate their privileges on the system.
* A flaw was found in the way the Linux kernel's TCP/IP protocol suite
implementation handled sending of certain UDP packets over sockets
that used the UDP_CORK option when the UDP Fragmentation Offload (UFO)
feature was enabled on the output device. A local, unprivileged user
could use this flaw to cause a denial of service or, potentially,
escalate their privileges on the system. (CVE-2013-4470, Important)
* A divide-by-zero flaw was found in the apic_get_tmcct() function in
KVM's Local Advanced Programmable Interrupt Controller (LAPIC)
implementation. A privileged guest user could use this flaw to crash
the host. (CVE-2013-6367, Important)
* A memory corruption flaw was discovered in the way KVM handled
virtual APIC accesses that crossed a page boundary. A local,
unprivileged user could use this flaw to crash the system or,
potentially, escalate their privileges on the system. (CVE-2013-6368,
* A buffer overflow flaw was found in the way the qeth_snmp_command()
function in the Linux kernel's QETH network device driver
implementation handled SNMP IOCTL requests with an out-of-bounds
length. A local, unprivileged user could use this flaw to crash the
system or, potentially, escalate their privileges on the system.
* It was found that the fix for CVE-2012-2375 released via
RHSA-2012:1580 accidentally removed a check for small-sized result
buffers. A local, unprivileged user with access to an NFSv4 mount with
ACL support could use this flaw to crash the system or, potentially,
escalate their privileges on the system. (CVE-2013-4591, Moderate)
* A format string flaw was found in the Linux kernel's block layer. A
privileged, local user could potentially use this flaw to escalate
their privileges to kernel level (ring0). (CVE-2013-2851, Low)
Red Hat would like to thank Hannes Frederic Sowa for reporting
CVE-2013-4470, Andrew Honig of Google for reporting CVE-2013-6367 and
CVE-2013-6368, and Kees Cook for reporting CVE-2013-2851.
This update also fixes several bugs. Documentation for these changes
will be available shortly 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. The system
must be rebooted for this update to take effect.
See also :
Update the affected packages.
Risk factor :
Medium / CVSS Base Score : 6.9
CVSS Temporal Score : 6.0
Public Exploit Available : false
Family: Red Hat Local Security Checks
Nessus Plugin ID: 79000 ()
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