USN-1567-1: Linux kernel vulnerabilities

Releases

• Ubuntu 11.04

Packages

• linux - Linux kernel

Details

A flaw was found in how the Linux kernel passed the replacement session
keyring to a child process. An unprivileged local user could exploit this
flaw to cause a denial of service (panic). (CVE-2012-2745)

Ben Hutchings reported a flaw in the Linux kernel with some network drivers
that support TSO (TCP segment offload). A local or peer user could exploit
this flaw to to cause a denial of service. (CVE-2012-3412)

Jay Fenlason and Doug Ledford discovered a bug in the Linux kernel
implementation of RDS sockets. A local unprivileged user could potentially
use this flaw to read privileged information from the kernel.
(CVE-2012-3430)

A flaw was discovered in the madvise feature of the Linux kernel's memory
subsystem. An unprivileged local use could exploit the flaw to cause a
denial of service (crash the system). (CVE-2012-3511)

Update instructions

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

Ubuntu 11.04

• linux-image-2.6.38-16-omap - 2.6.38-16.67
• linux-image-2.6.38-16-powerpc-smp - 2.6.38-16.67
• linux-image-2.6.38-16-versatile - 2.6.38-16.67
• linux-image-2.6.38-16-server - 2.6.38-16.67
• linux-image-2.6.38-16-powerpc64-smp - 2.6.38-16.67
• linux-image-2.6.38-16-generic-pae - 2.6.38-16.67
• linux-image-2.6.38-16-generic - 2.6.38-16.67
• linux-image-2.6.38-16-virtual - 2.6.38-16.67
• linux-image-2.6.38-16-powerpc - 2.6.38-16.67

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-2012-2745
• CVE-2012-3412
• CVE-2012-3430
• CVE-2012-3511

Related notices

• USN-1606-1: linux-image-2.6.32-44-powerpc, linux-image-2.6.32-44-powerpc-smp, linux-image-2.6.32-44-generic-pae, linux-image-2.6.32-44-server, linux-image-2.6.32-44-lpia, linux-image-2.6.32-44-virtual, linux-image-2.6.32-44-powerpc64-smp, linux-image-2.6.32-44-generic, linux-image-2.6.32-44-sparc64, linux-image-2.6.32-44-ia64, linux-image-2.6.32-44-sparc64-smp, linux-image-2.6.32-44-preempt, linux-image-2.6.32-44-386, linux-image-2.6.32-44-versatile, linux
• USN-1574-1: linux-image-2.6.38-16-virtual, linux-image-2.6.38-16-generic-pae, linux-lts-backport-natty, linux-image-2.6.38-16-server, linux-image-2.6.38-16-generic
• USN-1452-1: linux-image-3.0.0-20-generic, linux-image-3.0.0-20-powerpc-smp, linux-image-3.0.0-20-generic-pae, linux-image-3.0.0-20-omap, linux-image-3.0.0-20-virtual, linux-image-3.0.0-20-powerpc64-smp, linux-image-3.0.0-20-powerpc, linux, linux-image-3.0.0-20-server
• USN-1448-1: linux-image-3.2.0-24-generic-pae, linux-image-3.2.0-24-powerpc64-smp, linux-image-3.2.0-24-powerpc-smp, linux-image-3.2.0-24-generic, linux-image-3.2.0-24-omap, linux-image-3.2.0-24-virtual, linux
• USN-1459-1: linux-ti-omap4, linux-image-3.0.0-1210-omap4
• USN-1460-1: linux-ti-omap4, linux-image-3.2.0-1413-omap4
• USN-1597-1: linux-image-2.6.32-349-ec2, linux-ec2
• USN-1455-1: linux-lts-backport-oneiric, linux-image-3.0.0-20-generic, linux-image-3.0.0-20-generic-pae, linux-image-3.0.0-20-virtual, linux-image-3.0.0-20-server
• USN-1568-1: linux-image-3.0.0-26-omap, linux-image-3.0.0-26-powerpc64-smp, linux-image-3.0.0-26-server, linux-image-3.0.0-26-generic, linux-image-3.0.0-26-generic-pae, linux-image-3.0.0-26-powerpc-smp, linux-image-3.0.0-26-virtual, linux, linux-image-3.0.0-26-powerpc
• USN-1579-1: linux-image-3.2.0-31-omap, linux-image-3.2.0-31-highbank, linux-image-3.2.0-31-generic-pae, linux-image-3.2.0-31-powerpc-smp, linux-image-3.2.0-31-virtual, linux-image-3.2.0-31-powerpc64-smp, linux-image-3.2.0-31-generic, linux
• USN-1580-1: linux-ti-omap4, linux-image-3.2.0-1419-omap4
• USN-1572-1: linux-image-2.6.32-43-386, linux-image-2.6.32-43-ia64, linux-image-2.6.32-43-server, linux-image-2.6.32-43-generic-pae, linux-image-2.6.32-43-generic, linux-image-2.6.32-43-sparc64, linux-image-2.6.32-43-virtual, linux-image-2.6.32-43-powerpc64-smp, linux-image-2.6.32-43-powerpc, linux-image-2.6.32-43-sparc64-smp, linux-image-2.6.32-43-versatile, linux-image-2.6.32-43-preempt, linux-image-2.6.32-43-powerpc-smp, linux, linux-image-2.6.32-43-lpia
• USN-1577-1: linux-ti-omap4, linux-image-2.6.38-1209-omap4
• USN-1578-1: linux-ti-omap4, linux-image-3.0.0-1216-omap4
• USN-1573-1: linux-image-2.6.32-348-ec2, linux-ec2
• USN-1575-1: linux-image-3.0.0-26-server, linux-lts-backport-oneiric, linux-image-3.0.0-26-generic, linux-image-3.0.0-26-virtual, linux-image-3.0.0-26-generic-pae
• USN-1533-1: linux-image-3.0.0-24-powerpc-smp, linux-image-3.0.0-24-powerpc, linux-image-3.0.0-24-powerpc64-smp, linux-image-3.0.0-24-omap, linux-image-3.0.0-24-server, linux-image-3.0.0-24-generic-pae, linux-image-3.0.0-24-virtual, linux-image-3.0.0-24-generic, linux
• USN-1539-1: linux-lts-backport-oneiric, linux-image-3.0.0-24-server, linux-image-3.0.0-24-generic-pae, linux-image-3.0.0-24-virtual, linux-image-3.0.0-24-generic
• USN-1529-1: linux-image-3.2.0-29-omap, linux-image-3.2.0-29-powerpc-smp, linux-image-3.2.0-29-highbank, linux-image-3.2.0-29-generic, linux-image-3.2.0-29-virtual, linux-image-3.2.0-29-powerpc64-smp, linux-image-3.2.0-29-generic-pae, linux
• USN-1514-1: linux-ti-omap4, linux-image-3.2.0-1417-omap4
• USN-1532-1: linux-image-3.0.0-1214-omap4, linux-ti-omap4