=========================================================================Ubuntu Security Notice USN-1938-1
September 05, 2013
linux vulnerabilities
=========================================================================
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 13.04
Summary:
Several security issues were fixed in the kernel.
Software Description:
- linux: Linux kernel
Details:
Vasily Kulikov discovered a flaw in the Linux Kernel's perf tool that
allows for privilege escalation. A local 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 a guest OS read-only access to disks that support TRIM or SCSI
UNMAP. A privileged user in the guest OS could exploit this flaw to
destroy data on 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. A 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 the 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)
Update instructions:
The problem can be corrected by updating your system to the following
package versions:
Ubuntu 13.04:
linux-image-3.8.0-30-generic 3.8.0-30.44
After a standard system update you need to reboot your computer to make
all the necessary changes.
ATTENTION: Due to an unavoidable ABI change the kernel updates have
been given a new version number, which requires you to recompile and
reinstall all third party kernel modules you might have installed. If
you use linux-restricted-modules, you have to update that package as
well to get modules which work with the new kernel version. Unless you
manually uninstalled the standard kernel metapackages (e.g. linux-generic,
linux-server, linux-powerpc), a standard system upgrade will automatically
perform this as well.
References:
https://ubuntu.com/security/notices/USN-1938-1
CVE-2013-1060, CVE-2013-2140, CVE-2013-2232, CVE-2013-2234,
CVE-2013-4162, CVE-2013-4163
Package Information:
https://launchpad.net/ubuntu/+source/linux/3.8.0-30.44