Advisory Published

USN-1268-1: Linux kernel vulnerabilities

First published: Mon Nov 21 2011(Updated: )

It was discovered that CIFS incorrectly handled authentication. When a user had a CIFS share mounted that required authentication, a local user could mount the same share without knowing the correct password. (CVE-2011-1585) It was discovered that the GRE protocol incorrectly handled netns initialization. A remote attacker could send a packet while the ip_gre module was loading, and crash the system, leading to a denial of service. (CVE-2011-1767) It was discovered that the IP/IP protocol incorrectly handled netns initialization. A remote attacker could send a packet while the ipip module was loading, and crash the system, leading to a denial of service. (CVE-2011-1768) Vasily Averin discovered that the NFS Lock Manager (NLM) incorrectly handled unlock requests. A local attacker could exploit this to cause a denial of service. (CVE-2011-2491) Robert Swiecki discovered that mapping extensions were incorrectly handled. A local attacker could exploit this to crash the system, leading to a denial of service. (CVE-2011-2496) Ben Pfaff discovered that Classless Queuing Disciplines (qdiscs) were being incorrectly handled. A local attacker could exploit this to crash the system, leading to a denial of service. (CVE-2011-2525) Yasuaki Ishimatsu discovered a flaw in the kernel's clock implementation. A local unprivileged attacker could exploit this causing a denial of service. (CVE-2011-3209)

Affected SoftwareAffected VersionHow to fix
All of
ubuntu/linux-image-2.6.24-30-virtual<2.6.24-30.96
2.6.24-30.96
=8.04
All of
ubuntu/linux-image-2.6.24-30-server<2.6.24-30.96
2.6.24-30.96
=8.04
All of
ubuntu/linux-image-2.6.24-30-mckinley<2.6.24-30.96
2.6.24-30.96
=8.04
All of
ubuntu/linux-image-2.6.24-30-sparc64-smp<2.6.24-30.96
2.6.24-30.96
=8.04
All of
ubuntu/linux-image-2.6.24-30-xen<2.6.24-30.96
2.6.24-30.96
=8.04
All of
ubuntu/linux-image-2.6.24-30-powerpc-smp<2.6.24-30.96
2.6.24-30.96
=8.04
All of
ubuntu/linux-image-2.6.24-30-lpiacompat<2.6.24-30.96
2.6.24-30.96
=8.04
All of
ubuntu/linux-image-2.6.24-30-sparc64<2.6.24-30.96
2.6.24-30.96
=8.04
All of
ubuntu/linux-image-2.6.24-30-rt<2.6.24-30.96
2.6.24-30.96
=8.04
All of
ubuntu/linux-image-2.6.24-30-openvz<2.6.24-30.96
2.6.24-30.96
=8.04
All of
ubuntu/linux-image-2.6.24-30-lpia<2.6.24-30.96
2.6.24-30.96
=8.04
All of
ubuntu/linux-image-2.6.24-30-hppa64<2.6.24-30.96
2.6.24-30.96
=8.04
All of
ubuntu/linux-image-2.6.24-30-386<2.6.24-30.96
2.6.24-30.96
=8.04
All of
ubuntu/linux-image-2.6.24-30-powerpc<2.6.24-30.96
2.6.24-30.96
=8.04
All of
ubuntu/linux-image-2.6.24-30-powerpc64-smp<2.6.24-30.96
2.6.24-30.96
=8.04
All of
ubuntu/linux-image-2.6.24-30-itanium<2.6.24-30.96
2.6.24-30.96
=8.04
All of
ubuntu/linux-image-2.6.24-30-hppa32<2.6.24-30.96
2.6.24-30.96
=8.04
All of
ubuntu/linux-image-2.6.24-30-generic<2.6.24-30.96
2.6.24-30.96
=8.04

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