USN-1939-1: Linux kernel vulnerabilities

Ubuntu Security Notice USN-1939-1

6th September, 2013

linux vulnerabilities

A security issue affects these releases of Ubuntu and its derivatives:

  • Ubuntu 10.04 LTS

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 user could exploit this flaw to
run commands as root when using the perf tool.
(CVE-2013-1060)

Michael S. Tsirkin discovered a flaw in how the Linux kernel's KVM
subsystem allocates memory slots for the guest's address space. A local
user could exploit this flaw to gain system privileges or obtain sensitive
information from kernel memory. (CVE-2013-1943)

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)

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)

Update instructions

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

Ubuntu 10.04 LTS:
linux-image-2.6.32-51-preempt 2.6.32-51.113
linux-image-2.6.32-51-386 2.6.32-51.113
linux-image-2.6.32-51-powerpc64-smp 2.6.32-51.113
linux-image-2.6.32-51-sparc64-smp 2.6.32-51.113
linux-image-2.6.32-51-virtual 2.6.32-51.113
linux-image-2.6.32-51-powerpc 2.6.32-51.113
linux-image-2.6.32-51-ia64 2.6.32-51.113
linux-image-2.6.32-51-server 2.6.32-51.113
linux-image-2.6.32-51-versatile 2.6.32-51.113
linux-image-2.6.32-51-powerpc-smp 2.6.32-51.113
linux-image-2.6.32-51-sparc64 2.6.32-51.113
linux-image-2.6.32-51-generic 2.6.32-51.113
linux-image-2.6.32-51-lpia 2.6.32-51.113
linux-image-2.6.32-51-generic-pae 2.6.32-51.113

To update your system, please follow these instructions: https://wiki.ubuntu.com/Security/Upgrades.

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-2013-1060, CVE-2013-1943, CVE-2013-2206, CVE-2013-4162