USN-1205-1: Linux kernel (Maverick backport) vulnerabilities

13 September 2011

Multiple kernel flaws have been fixed.

Releases

Packages

Details

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)

Update instructions

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

Ubuntu 10.04

After a standard system update you need to reboot your computer to make
all the necessary changes.

Related notices

  • USN-1168-1: linux-image-2.6.32-33-generic-pae, linux-image-2.6.32-33-server, linux-image-2.6.32-33-virtual, linux-image-2.6.32-33-versatile, linux-image-2.6.32-33-ia64, linux-image-2.6.32-33-generic, linux, linux-image-2.6.32-33-sparc64-smp, linux-image-2.6.32-33-lpia, linux-image-2.6.32-33-sparc64, linux-image-2.6.32-33-powerpc64-smp, linux-image-2.6.32-33-preempt, linux-image-2.6.32-33-powerpc-smp, linux-image-2.6.32-33-386, linux-image-2.6.32-33-powerpc
  • USN-1201-1: linux-image-2.6.35-30-powerpc64-smp, linux-image-2.6.35-30-versatile, linux-image-2.6.35-30-virtual, linux, linux-image-2.6.35-30-omap, linux-image-2.6.35-30-server, linux-image-2.6.35-30-generic, linux-image-2.6.35-30-generic-pae, linux-image-2.6.35-30-powerpc-smp, linux-image-2.6.35-30-powerpc
  • USN-1193-1: linux-image-2.6.38-11-virtual, linux-image-2.6.38-11-server, linux-image-2.6.38-11-omap, linux, linux-image-2.6.38-11-versatile, linux-image-2.6.38-11-powerpc64-smp, linux-image-2.6.38-11-powerpc-smp, linux-image-2.6.38-11-generic-pae, linux-image-2.6.38-11-powerpc, linux-image-2.6.38-11-generic
  • USN-1167-1: linux-image-2.6.38-10-versatile, linux-image-2.6.38-10-virtual, linux, linux-image-2.6.38-10-generic-pae, linux-image-2.6.38-10-generic, linux-image-2.6.38-10-powerpc64-smp, linux-image-2.6.38-10-server, linux-image-2.6.38-10-powerpc-smp, linux-image-2.6.38-10-powerpc, linux-image-2.6.38-10-omap
  • USN-1208-1: linux-mvl-dove, linux-image-2.6.32-418-dove
  • USN-1216-1: linux-ec2, linux-image-2.6.32-318-ec2
  • USN-1159-1: linux-mvl-dove, linux-image-2.6.32-417-dove
  • USN-1218-1: linux-image-2.6.32-34-powerpc64-smp, linux-image-2.6.32-34-powerpc-smp, linux, linux-image-2.6.32-34-virtual, linux-image-2.6.32-34-powerpc, linux-image-2.6.32-34-server, linux-image-2.6.32-34-lpia, linux-image-2.6.32-34-sparc64, linux-image-2.6.32-34-preempt, linux-image-2.6.32-34-generic, linux-image-2.6.32-34-sparc64-smp, linux-image-2.6.32-34-versatile, linux-image-2.6.32-34-386, linux-image-2.6.32-34-ia64, linux-image-2.6.32-34-generic-pae
  • USN-1256-1: linux-image-2.6.38-12-virtual, linux-image-2.6.38-12-server, linux-image-2.6.38-12-generic-pae, linux-lts-backport-natty, linux-image-2.6.38-12-generic
  • USN-1189-1: linux, linux-image-2.6.24-29-powerpc-smp, linux-image-2.6.24-29-powerpc64-smp, linux-image-2.6.24-29-sparc64-smp, linux-image-2.6.24-29-lpiacompat, linux-image-2.6.24-29-386, linux-image-2.6.24-29-lpia, linux-image-2.6.24-29-generic, linux-image-2.6.24-29-hppa64, linux-image-2.6.24-29-virtual, linux-image-2.6.24-29-openvz, linux-image-2.6.24-29-itanium, linux-image-2.6.24-29-powerpc, linux-image-2.6.24-29-rt, linux-image-2.6.24-29-server, linux-image-2.6.24-29-sparc64, linux-image-2.6.24-29-xen, linux-image-2.6.24-29-hppa32, linux-image-2.6.24-29-mckinley
  • USN-1161-1: linux-ec2, linux-image-2.6.32-317-ec2
  • USN-1203-1: linux-image-2.6.32-218-dove, linux-mvl-dove
  • USN-1204-1: linux-image-2.6.31-610-imx51, linux-fsl-imx51
  • USN-1162-1: linux-image-2.6.32-217-dove, linux-mvl-dove
  • USN-1202-1: linux-ti-omap4, linux-image-2.6.35-903-omap4
  • USN-1212-1: linux-ti-omap4, linux-image-2.6.38-1209-omap4
  • USN-1211-1: linux-image-2.6.38-11-virtual, linux-image-2.6.38-11-server, linux-image-2.6.38-11-omap, linux, linux-image-2.6.38-11-versatile, linux-image-2.6.38-11-powerpc64-smp, linux-image-2.6.38-11-powerpc-smp, linux-image-2.6.38-11-generic-pae, linux-image-2.6.38-11-powerpc, linux-image-2.6.38-11-generic
  • USN-1186-1: linux, linux-image-2.6.24-29-powerpc-smp, linux-image-2.6.24-29-powerpc64-smp, linux-image-2.6.24-29-sparc64-smp, linux-image-2.6.24-29-lpiacompat, linux-image-2.6.24-29-386, linux-image-2.6.24-29-lpia, linux-image-2.6.24-29-generic, linux-image-2.6.24-29-hppa64, linux-image-2.6.24-29-virtual, linux-image-2.6.24-29-openvz, linux-image-2.6.24-29-itanium, linux-image-2.6.24-29-powerpc, linux-image-2.6.24-29-rt, linux-image-2.6.24-29-server, linux-image-2.6.24-29-sparc64, linux-image-2.6.24-29-xen, linux-image-2.6.24-29-hppa32, linux-image-2.6.24-29-mckinley