USN-1939-1: Linux kernel vulnerabilities
Ubuntu Security Notice USN-1939-1
6th September, 2013
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 10.04 LTS
Several security issues were fixed in the kernel.
- linux - Linux kernel
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.
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.
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)
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.