Advisory Published

USN-1246-1: Linux kernel vulnerabilities

First published: Tue Oct 25 2011(Updated: )

Dan Rosenberg discovered that the IPv4 diagnostic routines did not correctly validate certain requests. A local attacker could exploit this to consume CPU resources, leading to a denial of service. (CVE-2011-2213) Dan Rosenberg discovered that the Bluetooth stack incorrectly handled certain L2CAP requests. If a system was using Bluetooth, a remote attacker could send specially crafted traffic to crash the system or gain root privileges. (CVE-2011-2497) It was discovered that the EXT4 filesystem contained multiple off-by-one flaws. A local attacker could exploit this to crash the system, leading to a denial of service. (CVE-2011-2695) Mauro Carvalho Chehab discovered that the si4713 radio driver did not correctly check the length of memory copies. If this hardware was available, a local attacker could exploit this to crash the system or gain root privileges. (CVE-2011-2700) Herbert Xu discovered that certain fields were incorrectly handled when Generic Receive Offload (CVE-2011-2723) Time Warns discovered that long symlinks were incorrectly handled on Be filesystems. A local attacker could exploit this with a malformed Be filesystem and crash the system, leading to a denial of service. (CVE-2011-2928) Dan Kaminsky discovered that the kernel incorrectly handled random sequence number generation. An attacker could use this flaw to possibly predict sequence numbers and inject packets. (CVE-2011-3188) Darren Lavender discovered that the CIFS client incorrectly handled certain large values. A remote attacker with a malicious server could exploit this to crash the system or possibly execute arbitrary code as the root user. (CVE-2011-3191)

Affected SoftwareAffected VersionHow to fix
All of
ubuntu/linux-image-2.6.38-12-powerpc64-smp<2.6.38-12.51
2.6.38-12.51
=11.04
All of
ubuntu/linux-image-2.6.38-12-powerpc-smp<2.6.38-12.51
2.6.38-12.51
=11.04
All of
ubuntu/linux-image-2.6.38-12-powerpc<2.6.38-12.51
2.6.38-12.51
=11.04
All of
ubuntu/linux-image-2.6.38-12-generic-pae<2.6.38-12.51
2.6.38-12.51
=11.04
All of
ubuntu/linux-image-2.6.38-12-virtual<2.6.38-12.51
2.6.38-12.51
=11.04
All of
ubuntu/linux-image-2.6.38-12-server<2.6.38-12.51
2.6.38-12.51
=11.04
All of
ubuntu/linux-image-2.6.38-12-versatile<2.6.38-12.51
2.6.38-12.51
=11.04
All of
ubuntu/linux-image-2.6.38-12-omap<2.6.38-12.51
2.6.38-12.51
=11.04
All of
ubuntu/linux-image-2.6.38-12-generic<2.6.38-12.51
2.6.38-12.51
=11.04

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