USN-1809-1: Linux kernel vulnerabilities

Releases

• Ubuntu 12.04

Packages

• linux - Linux kernel

Details

Mathias Krause discovered an information leak in the Linux kernel's UDF
file system implementation. A local user could exploit this flaw to examine
some of the kernel's heap memory. (CVE-2012-6548)

Mathias Krause discovered an information leak in the Linux kernel's ISO
9660 CDROM file system driver. A local user could exploit this flaw to
examine some of the kernel's heap memory. (CVE-2012-6549)

An integer overflow was discovered in the Direct Rendering Manager (DRM)
subsystem for the i915 video driver in the Linux kernel. A local user could
exploit this flaw to cause a denial of service (crash) or potentially
escalate privileges. (CVE-2013-0913)

Andrew Honig discovered a flaw in guest OS time updates in the Linux
kernel's KVM (Kernel-based Virtual Machine). A privileged guest user could
exploit this flaw to cause a denial of service (crash host system) or
potential escalate privilege to the host kernel level. (CVE-2013-1796)

Andrew Honig discovered a use after free error in guest OS time updates in
the Linux kernel's KVM (Kernel-based Virtual Machine). A privileged guest
user could exploit this flaw to escalate privilege to the host kernel
level. (CVE-2013-1797)

Andrew Honig reported a flaw in the way KVM (Kernel-based Virtual Machine)
emulated the IOAPIC. A privileged guest user could exploit this flaw to
read host memory or cause a denial of service (crash the host).
(CVE-2013-1798)

A format-string bug was discovered in the Linux kernel's ext3 filesystem
driver. A local user could exploit this flaw to possibly escalate
privileges on the system. (CVE-2013-1848)

A buffer overflow was discovered in the Linux Kernel's USB subsystem for
devices reporting the cdc-wdm class. A specially crafted USB device when
plugged-in could cause a denial of service (system crash) or possibly
execute arbitrary code. (CVE-2013-1860)

A flaw was discovered in the SCTP (stream control transfer protocol)
network protocol's handling of duplicate cookies in the Linux kernel. A
remote attacker could exploit this flaw to cause a denial of service
(system crash) on another remote user querying the SCTP connection.
(CVE-2013-2206)

An information leak in the Linux kernel's dcb netlink interface was
discovered. A local user could obtain sensitive information by examining
kernel stack memory. (CVE-2013-2634)

A kernel stack information leak was discovered in the RTNETLINK component
of the Linux kernel. A local user could read sensitive information from the
kernel stack. (CVE-2013-2635)

Update instructions

The problem can be corrected by updating your system to the following package versions:

Ubuntu 12.04

• linux-image-3.2.0-41-virtual - 3.2.0-41.66
• linux-image-3.2.0-41-generic-pae - 3.2.0-41.66
• linux-image-3.2.0-41-powerpc-smp - 3.2.0-41.66
• linux-image-3.2.0-41-powerpc64-smp - 3.2.0-41.66
• linux-image-3.2.0-41-omap - 3.2.0-41.66
• linux-image-3.2.0-41-generic - 3.2.0-41.66
• linux-image-3.2.0-41-highbank - 3.2.0-41.66

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

• CVE-2012-6548
• CVE-2012-6549
• CVE-2013-0913
• CVE-2013-1796
• CVE-2013-1797
• CVE-2013-1798
• CVE-2013-1848
• CVE-2013-1860
• CVE-2013-2206
• CVE-2013-2634
• CVE-2013-2635

Related notices

• USN-1812-1: linux-lts-quantal, linux-image-3.5.0-28-generic
• USN-1813-1: linux-image-3.5.0-28-highbank, linux-image-3.5.0-28-powerpc64-smp, linux-image-3.5.0-28-powerpc-smp, linux, linux-image-3.5.0-28-generic, linux-image-3.5.0-28-omap
• USN-1814-1: linux-ti-omap4, linux-image-3.5.0-223-omap4
• USN-1811-1: linux-image-3.2.0-1430-omap4, linux-ti-omap4
• USN-1805-1: linux-image-2.6.32-46-powerpc64-smp, linux-image-2.6.32-46-generic, linux-image-2.6.32-46-generic-pae, linux-image-2.6.32-46-lpia, linux-image-2.6.32-46-386, linux-image-2.6.32-46-preempt, linux, linux-image-2.6.32-46-powerpc-smp, linux-image-2.6.32-46-virtual, linux-image-2.6.32-46-sparc64, linux-image-2.6.32-46-ia64, linux-image-2.6.32-46-versatile, linux-image-2.6.32-46-powerpc, linux-image-2.6.32-46-server, linux-image-2.6.32-46-sparc64-smp
• USN-1808-1: linux-image-2.6.32-351-ec2, linux-ec2
• USN-1829-1: linux-image-2.6.32-352-ec2, linux-ec2
• USN-1824-1: linux-image-2.6.32-47-powerpc, linux-image-2.6.32-47-server, linux-image-2.6.32-47-sparc64, linux-image-2.6.32-47-virtual, linux-image-2.6.32-47-versatile, linux, linux-image-2.6.32-47-generic-pae, linux-image-2.6.32-47-386, linux-image-2.6.32-47-powerpc64-smp, linux-image-2.6.32-47-sparc64-smp, linux-image-2.6.32-47-preempt, linux-image-2.6.32-47-lpia, linux-image-2.6.32-47-ia64, linux-image-2.6.32-47-generic, linux-image-2.6.32-47-powerpc-smp
• USN-1876-1: linux-image-2.6.32-48-server, linux-image-2.6.32-48-versatile, linux-image-2.6.32-48-powerpc, linux-image-2.6.32-48-virtual, linux-image-2.6.32-48-powerpc64-smp, linux-image-2.6.32-48-generic, linux, linux-image-2.6.32-48-generic-pae, linux-image-2.6.32-48-lpia, linux-image-2.6.32-48-preempt, linux-image-2.6.32-48-sparc64-smp, linux-image-2.6.32-48-386, linux-image-2.6.32-48-sparc64, linux-image-2.6.32-48-powerpc-smp, linux-image-2.6.32-48-ia64
• USN-1877-1: linux-image-2.6.32-353-ec2, linux-ec2
• LSN-0065-1: aws, lowlatency-4.4, gcp, azure, generic-4.15, lowlatency-4.15, generic-4.4
• USN-1940-1: linux-image-2.6.32-356-ec2, linux-ec2
• USN-1939-1: linux-image-2.6.32-51-lpia, linux-image-2.6.32-51-generic, linux-image-2.6.32-51-server, linux-image-2.6.32-51-powerpc-smp, linux-image-2.6.32-51-virtual, linux-image-2.6.32-51-versatile, linux, linux-image-2.6.32-51-sparc64-smp, linux-image-2.6.32-51-generic-pae, linux-image-2.6.32-51-386, linux-image-2.6.32-51-sparc64, linux-image-2.6.32-51-preempt, linux-image-2.6.32-51-powerpc64-smp, linux-image-2.6.32-51-ia64, linux-image-2.6.32-51-powerpc