[Trisquel-security] [USN-1189-1] Linux kernel vulnerabilities

[Kees Cook]

==========================================================================
Ubuntu Security Notice USN-1189-1
August 19, 2011

linux vulnerabilities
==========================================================================

A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 8.04 LTS

Summary:

Multiple kernel flaws were fixed.

Software Description:
- linux: Linux kernel

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)

Update instructions:

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

Ubuntu 8.04 LTS:
  linux-image-2.6.24-29-386       2.6.24-29.93
  linux-image-2.6.24-29-generic   2.6.24-29.93
  linux-image-2.6.24-29-hppa32    2.6.24-29.93
  linux-image-2.6.24-29-hppa64    2.6.24-29.93
  linux-image-2.6.24-29-itanium   2.6.24-29.93
  linux-image-2.6.24-29-lpia      2.6.24-29.93
  linux-image-2.6.24-29-lpiacompat  2.6.24-29.93
  linux-image-2.6.24-29-mckinley  2.6.24-29.93
  linux-image-2.6.24-29-openvz    2.6.24-29.93
  linux-image-2.6.24-29-powerpc   2.6.24-29.93
  linux-image-2.6.24-29-powerpc-smp  2.6.24-29.93
  linux-image-2.6.24-29-powerpc64-smp  2.6.24-29.93
  linux-image-2.6.24-29-rt        2.6.24-29.93
  linux-image-2.6.24-29-server    2.6.24-29.93
  linux-image-2.6.24-29-sparc64   2.6.24-29.93
  linux-image-2.6.24-29-sparc64-smp  2.6.24-29.93
  linux-image-2.6.24-29-virtual   2.6.24-29.93
  linux-image-2.6.24-29-xen       2.6.24-29.93

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

References:
  http://www.ubuntu.com/usn/usn-1189-1
  CVE-2011-1020, CVE-2011-1078, CVE-2011-1079, CVE-2011-1080,
  CVE-2011-1093, CVE-2011-1160, CVE-2011-1180, CVE-2011-1493,
  CVE-2011-2492

Package Information:
  https://launchpad.net/ubuntu/+source/linux/2.6.24-29.93

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