Ubuntu 12.10 : linux vulnerabilities (USN-1944-1)

Ubuntu Security Notice (C) 2013-2014 Canonical, Inc. / NASL script (C) 2013-2014 Tenable Network Security, Inc.


Synopsis :

The remote Ubuntu host is missing one or more security-related patches.

Description :

A denial of service flaw was discovered in the Btrfs file system in
the Linux kernel. A local user could cause a denial of service by
creating a large number of files with names that have the same CRC32
hash value. (CVE-2012-5374)

A denial of service flaw was discovered in the Btrfs file system in
the Linux kernel. A local user could cause a denial of service
(prevent file creation) for a victim, by creating a file with a
specific CRC32C hash value in a directory important to the victim.
(CVE-2012-5375)

Vasily Kulikov discovered a flaw in the Linux Kernel's perf tool that
allows for privilege escalation. A local user could exploit this flaw
to run commands as root when using the perf tool. (CVE-2013-1060)

A flaw was discovered in the Xen subsystem of the Linux kernel when it
provides read-only access to a disk that supports TRIM or SCSI UNMAP
to a guest OS. A privileged user in the guest OS could exploit this
flaw to destroy data on the disk, even though the guest OS should not
be able to write to the disk. (CVE-2013-2140)

A flaw was discovered in the Linux kernel when an IPv6 socket is used
to connect to an IPv4 destination. An unprivileged local user could
exploit this flaw to cause a denial of service (system crash).
(CVE-2013-2232)

An information leak was discovered in the IPSec key_socket
implementation in the Linux kernel. An local user could exploit this
flaw to examine potentially sensitive information in kernel memory.
(CVE-2013-2234)

Hannes Frederic Sowa discovered a flaw in setsockopt UDP_CORK option
in the Linux kernel's IPv6 stack. A local user could exploit this flaw
to cause a denial of service (system crash). (CVE-2013-4162)

Hannes Frederic Sowa discovered a flaw in the IPv6 subsystem of the
Linux kernel when the IPV6_MTU setsockopt option has been specified in
combination with the UDP_CORK option. A local user could exploit this
flaw to cause a denial of service (system crash). (CVE-2013-4163).

Solution :

Update the affected linux-image-3.5.0-40-generic and / or
linux-image-3.5.0-40-highbank packages.

Risk factor :

Medium / CVSS Base Score : 6.9
(CVSS2#AV:L/AC:M/Au:N/C:C/I:C/A:C)
CVSS Temporal Score : 6.0
(CVSS2#E:ND/RL:OF/RC:ND)
Public Exploit Available : true

Family: Ubuntu Local Security Checks

Nessus Plugin ID: 69811 ()

Bugtraq ID: 56939

CVE ID: CVE-2012-5374
CVE-2012-5375
CVE-2013-1060
CVE-2013-2140
CVE-2013-2232
CVE-2013-2234
CVE-2013-4162
CVE-2013-4163