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USN-1189-1: Linux kernel vulnerabilities

19 August 2011

Multiple kernel flaws were fixed.

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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)

Vasiliy Kulikov discovered that the Bluetooth stack did not correctly clear
memory. A local attacker could exploit this to read kernel stack memory,
leading to a loss of privacy. (CVE-2011-1078)

Vasiliy Kulikov discovered that the Bluetooth stack did not correctly check
that device name strings were NULL terminated. A local attacker could
exploit this to crash the system, leading to a denial of service, or leak
contents of kernel stack memory, leading to a loss of privacy.
(CVE-2011-1079)

Vasiliy Kulikov discovered that bridge network filtering did not check that
name fields were NULL terminated. A local attacker could exploit this to
leak contents of kernel stack memory, leading to a loss of privacy.
(CVE-2011-1080)

Johan Hovold discovered that the DCCP network stack did not correctly
handle certain packet combinations. A remote attacker could send specially
crafted network traffic that would crash the system, leading to a denial of
service. (CVE-2011-1093)

Peter Huewe discovered that the TPM device did not correctly initialize
memory. A local attacker could exploit this to read kernel heap memory
contents, leading to a loss of privacy. (CVE-2011-1160)

Dan Rosenberg discovered that the IRDA subsystem did not correctly check
certain field sizes. If a system was using IRDA, a remote attacker could
send specially crafted traffic to crash the system or gain root privileges.
(CVE-2011-1180)

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)

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)

Dan Rosenberg discovered flaws in the linux Rose (X.25 PLP) layer used by
amateur radio. A local user or a remote user on an X.25 network could
exploit these flaws to execute arbitrary code as root. (CVE-2011-4913)

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)

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Ubuntu Pro provides ten-year security coverage to 25,000+ packages in Main and Universe repositories, and it is free for up to five machines.

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Update instructions

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

Ubuntu 8.04

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

References

Related notices

  • USN-1205-1: linux-image-2.6.35-30-generic, linux-image-2.6.35-30-server, linux-image-2.6.35-30-virtual, linux-image-2.6.35-30-generic-pae, linux-lts-backport-maverick
  • USN-1211-1: linux-image-2.6.38-11-powerpc64-smp, linux-image-2.6.38-11-generic, linux-image-2.6.38-11-powerpc, linux, linux-image-2.6.38-11-generic-pae, linux-image-2.6.38-11-versatile, linux-image-2.6.38-11-server, linux-image-2.6.38-11-powerpc-smp, linux-image-2.6.38-11-virtual, linux-image-2.6.38-11-omap
  • USN-1202-1: linux-ti-omap4, linux-image-2.6.35-903-omap4
  • USN-1203-1: linux-image-2.6.32-218-dove, linux-mvl-dove
  • USN-1218-1: linux-image-2.6.32-34-server, linux, linux-image-2.6.32-34-versatile, linux-image-2.6.32-34-virtual, linux-image-2.6.32-34-powerpc-smp, linux-image-2.6.32-34-powerpc, linux-image-2.6.32-34-powerpc64-smp, linux-image-2.6.32-34-generic-pae, linux-image-2.6.32-34-386, linux-image-2.6.32-34-sparc64, linux-image-2.6.32-34-generic, linux-image-2.6.32-34-preempt, linux-image-2.6.32-34-ia64, linux-image-2.6.32-34-sparc64-smp, linux-image-2.6.32-34-lpia
  • USN-1204-1: linux-fsl-imx51, linux-image-2.6.31-610-imx51
  • USN-1208-1: linux-mvl-dove, linux-image-2.6.32-418-dove
  • USN-1256-1: linux-image-2.6.38-12-generic-pae, linux-image-2.6.38-12-generic, linux-image-2.6.38-12-virtual, linux-image-2.6.38-12-server, linux-lts-backport-natty
  • USN-1201-1: linux-image-2.6.35-30-generic, linux-image-2.6.35-30-powerpc, linux-image-2.6.35-30-server, linux, linux-image-2.6.35-30-versatile, linux-image-2.6.35-30-virtual, linux-image-2.6.35-30-generic-pae, linux-image-2.6.35-30-omap, linux-image-2.6.35-30-powerpc-smp, linux-image-2.6.35-30-powerpc64-smp
  • USN-1212-1: linux-ti-omap4, linux-image-2.6.38-1209-omap4
  • USN-1216-1: linux-ec2, linux-image-2.6.32-318-ec2
  • USN-1160-1: linux-image-2.6.35-30-generic, linux-image-2.6.35-30-powerpc, linux-image-2.6.35-30-server, linux, linux-image-2.6.35-30-versatile, linux-image-2.6.35-30-virtual, linux-image-2.6.35-30-generic-pae, linux-image-2.6.35-30-omap, linux-image-2.6.35-30-powerpc-smp, linux-image-2.6.35-30-powerpc64-smp
  • USN-1141-1: linux-image-2.6.32-32-generic-pae, linux-image-2.6.32-32-sparc64-smp, linux-image-2.6.32-32-powerpc-smp, linux-image-2.6.32-32-powerpc64-smp, linux, linux-image-2.6.32-32-preempt, linux-ec2, linux-image-2.6.32-32-ia64, linux-image-2.6.32-32-lpia, linux-image-2.6.32-32-powerpc, linux-image-2.6.32-32-versatile, linux-image-2.6.32-32-virtual, linux-image-2.6.32-32-sparc64, linux-image-2.6.32-32-386, linux-image-2.6.32-32-generic, linux-image-2.6.32-316-ec2, linux-image-2.6.32-32-server
  • USN-1162-1: linux-mvl-dove, linux-image-2.6.32-217-dove
  • USN-1167-1: linux, linux-image-2.6.38-10-powerpc-smp, linux-image-2.6.38-10-versatile, linux-image-2.6.38-10-powerpc, linux-image-2.6.38-10-generic, linux-image-2.6.38-10-powerpc64-smp, linux-image-2.6.38-10-virtual, linux-image-2.6.38-10-server, linux-image-2.6.38-10-generic-pae, linux-image-2.6.38-10-omap
  • USN-1187-1: linux-image-2.6.35-30-generic, linux-image-2.6.35-30-server, linux-image-2.6.35-30-virtual, linux-image-2.6.35-30-generic-pae, linux-lts-backport-maverick
  • USN-1159-1: linux-mvl-dove, linux-image-2.6.32-417-dove
  • USN-1093-1: linux-image-2.6.32-416-dove, linux-image-2.6.32-216-dove, linux-mvl-dove

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Further reading