USN-1472-1: Linux kernel vulnerabilities

Releases

• Ubuntu 11.10

Packages

• linux - Linux kernel

Details

Andy Adamson discovered a flaw in the Linux kernel's NFSv4 implementation.
A remote NFS server (attacker) could exploit this flaw to cause a denial of
service. (CVE-2011-4131)

A flaw was discovered in the Linux kernel's KVM (kernel virtual machine).
An administrative user in the guest OS could leverage this flaw to cause a
denial of service in the host OS. (CVE-2012-2121)

Schacher Raindel discovered a flaw in the Linux kernel's memory handling
when hugetlb is enabled. An unprivileged local attacker could exploit this
flaw to cause a denial of service and potentially gain higher privileges.
(CVE-2012-2133)

Stephan Mueller reported a flaw in the Linux kernel's dl2k network driver's
handling of ioctls. An unprivileged local user could leverage this flaw to
cause a denial of service. (CVE-2012-2313)

Timo Warns reported multiple flaws in the Linux kernel's hfsplus
filesystem. An unprivileged local user could exploit these flaws to gain
root system priviliges. (CVE-2012-2319)

Xi Wang discovered a flaw in the Linux kernel's i915 graphics driver
handling of cliprect on 32 bit systems. An unprivileged local attacker
could leverage this flaw to cause a denial of service or potentially gain
root privileges. (CVE-2012-2383)

Xi Wang discovered a flaw in the Linux kernel's i915 graphics driver
handling of buffer_count on 32 bit systems. An unprivileged local attacker
could leverage this flaw to cause a denial of service or potentially gain
root privileges. (CVE-2012-2384)

Update instructions

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

Ubuntu 11.10

• linux-image-3.0.0-21-powerpc-smp - 3.0.0-21.35
• linux-image-3.0.0-21-powerpc64-smp - 3.0.0-21.35
• linux-image-3.0.0-21-omap - 3.0.0-21.35
• linux-image-3.0.0-21-generic - 3.0.0-21.35
• linux-image-3.0.0-21-virtual - 3.0.0-21.35
• linux-image-3.0.0-21-server - 3.0.0-21.35
• linux-image-3.0.0-21-generic-pae - 3.0.0-21.35
• linux-image-3.0.0-21-powerpc - 3.0.0-21.35

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-2011-4131
• CVE-2012-2121
• CVE-2012-2133
• CVE-2012-2313
• CVE-2012-2319
• CVE-2012-2383
• CVE-2012-2384

Related notices

• USN-1457-1: linux-image-2.6.38-15-generic-pae, linux-image-2.6.38-15-powerpc, linux, linux-image-2.6.38-15-powerpc64-smp, linux-image-2.6.38-15-generic, linux-image-2.6.38-15-server, linux-image-2.6.38-15-versatile, linux-image-2.6.38-15-powerpc-smp, linux-image-2.6.38-15-omap, linux-image-2.6.38-15-virtual
• USN-1476-1: linux-ti-omap4, linux-image-3.0.0-1211-omap4
• USN-1470-1: linux-image-2.6.38-15-generic-pae, linux-image-2.6.38-15-generic, linux-image-2.6.38-15-server, linux-image-2.6.38-15-virtual, linux-lts-backport-natty
• USN-1471-1: linux-image-3.0.0-21-generic, linux-lts-backport-oneiric, linux-image-3.0.0-21-virtual, linux-image-3.0.0-21-server, linux-image-3.0.0-21-generic-pae
• USN-1530-1: linux-ti-omap4, linux-image-2.6.38-1209-omap4
• USN-1474-1: linux-ti-omap4, linux-image-3.2.0-1414-omap4
• USN-2037-1: linux-ec2, linux-image-2.6.32-359-ec2
• USN-1473-1: linux-image-3.2.0-25-powerpc-smp, linux-image-3.2.0-25-powerpc64-smp, linux, linux-image-3.2.0-25-omap, linux-image-3.2.0-25-generic, linux-image-3.2.0-25-virtual, linux-image-3.2.0-25-highbank, linux-image-3.2.0-25-generic-pae
• USN-1577-1: linux-ti-omap4, linux-image-2.6.38-1209-omap4
• USN-2036-1: linux-image-2.6.32-54-powerpc-smp, linux-image-2.6.32-54-powerpc, linux-image-2.6.32-54-sparc64-smp, linux-image-2.6.32-54-lpia, linux-image-2.6.32-54-generic-pae, linux-image-2.6.32-54-sparc64, linux-image-2.6.32-54-preempt, linux, linux-image-2.6.32-54-virtual, linux-image-2.6.32-54-386, linux-image-2.6.32-54-powerpc64-smp, linux-image-2.6.32-54-versatile, linux-image-2.6.32-54-generic, linux-image-2.6.32-54-server, linux-image-2.6.32-54-ia64
• USN-1469-1: linux-ec2, linux-image-2.6.32-345-ec2
• USN-1468-1: linux-image-2.6.32-41-ia64, linux-image-2.6.32-41-sparc64-smp, linux-image-2.6.32-41-386, linux-image-2.6.32-41-powerpc-smp, linux, linux-image-2.6.32-41-generic-pae, linux-image-2.6.32-41-sparc64, linux-image-2.6.32-41-generic, linux-image-2.6.32-41-powerpc, linux-image-2.6.32-41-versatile, linux-image-2.6.32-41-server, linux-image-2.6.32-41-powerpc64-smp, linux-image-2.6.32-41-preempt, linux-image-2.6.32-41-virtual, linux-image-2.6.32-41-lpia
• USN-1491-1: linux-ec2, linux-image-2.6.32-345-ec2
• USN-1493-1: linux-image-2.6.24-31-mckinley, linux-image-2.6.24-31-hppa32, linux-image-2.6.24-31-lpia, linux-image-2.6.24-31-powerpc64-smp, linux-image-2.6.24-31-lpiacompat, linux-image-2.6.24-31-powerpc, linux-image-2.6.24-31-sparc64, linux-image-2.6.24-31-generic, linux-image-2.6.24-31-virtual, linux, linux-image-2.6.24-31-server, linux-image-2.6.24-31-xen, linux-image-2.6.24-31-386, linux-image-2.6.24-31-hppa64, linux-image-2.6.24-31-powerpc-smp, linux-image-2.6.24-31-itanium, linux-image-2.6.24-31-openvz, linux-image-2.6.24-31-rt, linux-image-2.6.24-31-sparc64-smp
• USN-1490-1: linux-image-2.6.38-15-generic-pae, linux-image-2.6.38-15-generic, linux-image-2.6.38-15-server, linux-image-2.6.38-15-virtual, linux-lts-backport-natty
• USN-1492-1: linux-image-2.6.32-41-ia64, linux-image-2.6.32-41-sparc64-smp, linux-image-2.6.32-41-386, linux-image-2.6.32-41-powerpc-smp, linux, linux-image-2.6.32-41-generic-pae, linux-image-2.6.32-41-sparc64, linux-image-2.6.32-41-generic, linux-image-2.6.32-41-powerpc, linux-image-2.6.32-41-versatile, linux-image-2.6.32-41-server, linux-image-2.6.32-41-powerpc64-smp, linux-image-2.6.32-41-preempt, linux-image-2.6.32-41-virtual, linux-image-2.6.32-41-lpia
• USN-1488-1: linux-image-2.6.38-15-generic-pae, linux-image-2.6.38-15-powerpc, linux, linux-image-2.6.38-15-powerpc64-smp, linux-image-2.6.38-15-generic, linux-image-2.6.38-15-server, linux-image-2.6.38-15-versatile, linux-image-2.6.38-15-powerpc-smp, linux-image-2.6.38-15-omap, linux-image-2.6.38-15-virtual