Advisory Published

USN-1201-1: Linux kernel vulnerabilities

First published: Tue Sep 13 2011(Updated: )

It was discovered that the /proc filesystem did not correctly handle permission changes when programs executed. A local attacker could hold open files to examine details about programs running with higher privileges, potentially increasing the chances of exploiting additional vulnerabilities. (CVE-2011-1020) Dan Rosenberg discovered that the X.25 Rose network stack did not correctly handle certain fields. If a system was running with Rose enabled, a remote attacker could send specially crafted traffic to gain root privileges. (CVE-2011-1493) Dan Rosenberg discovered that the DCCP stack did not correctly handle certain packet structures. A remote attacker could exploit this to crash the system, leading to a denial of service. (CVE-2011-1770) Vasiliy Kulikov discovered that taskstats listeners were not correctly handled. A local attacker could expoit this to exhaust memory and CPU resources, leading to a denial of service. (CVE-2011-2484) It was discovered that Bluetooth l2cap and rfcomm did not correctly initialize structures. A local attacker could exploit this to read portions of the kernel stack, leading to a loss of privacy. (CVE-2011-2492) A flaw was found in the Linux kernel's /proc//map* interface. A local, unprivileged user could exploit this flaw to cause a denial of service. (CVE-2011-3637) Ben Hutchings discovered several flaws in the Linux Rose (X.25 PLP) layer. A local user or a remote user on an X.25 network could exploit these flaws to execute arbitrary code as root. (CVE-2011-4914)

Affected SoftwareAffected VersionHow to fix
All of
ubuntu/linux-image-2.6.35-30-powerpc-smp<2.6.35-30.59
2.6.35-30.59
=10.10
All of
ubuntu/linux-image-2.6.35-30-versatile<2.6.35-30.59
2.6.35-30.59
=10.10
All of
ubuntu/linux-image-2.6.35-30-server<2.6.35-30.59
2.6.35-30.59
=10.10
All of
ubuntu/linux-image-2.6.35-30-powerpc64-smp<2.6.35-30.59
2.6.35-30.59
=10.10
All of
ubuntu/linux-image-2.6.35-30-virtual<2.6.35-30.59
2.6.35-30.59
=10.10
All of
ubuntu/linux-image-2.6.35-30-generic-pae<2.6.35-30.59
2.6.35-30.59
=10.10
All of
ubuntu/linux-image-2.6.35-30-omap<2.6.35-30.59
2.6.35-30.59
=10.10
All of
ubuntu/linux-image-2.6.35-30-generic<2.6.35-30.59
2.6.35-30.59
=10.10
All of
ubuntu/linux-image-2.6.35-30-powerpc<2.6.35-30.59
2.6.35-30.59
=10.10

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