[USN-1186-1] Linux kernel vulnerabilities

Kees Cook kees at ubuntu.com
Tue Aug 9 02:30:01 UTC 2011


==========================================================================
Ubuntu Security Notice USN-1186-1
August 09, 2011

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

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

- Ubuntu 8.04 LTS

Summary:

Multiple kernel flaws have been fixed.

Software Description:
- linux: Linux kernel

Details:

Dan Rosenberg discovered that IPC structures were not correctly initialized
on 64bit systems. A local attacker could exploit this to read kernel stack
memory, leading to a loss of privacy. (CVE-2010-4073)

Steve Chen discovered that setsockopt did not correctly check MSS values. A
local attacker could make a specially crafted socket call to crash the
system, leading to a denial of service. (CVE-2010-4165)

Vladymyr Denysov discovered that Xen virtual CD-ROM devices were not
handled correctly. A local attacker in a guest could make crafted blkback
requests that would crash the host, leading to a denial of service.
(CVE-2010-4238)

Vegard Nossum discovered that memory garbage collection was not handled
correctly for active sockets. A local attacker could exploit this to
allocate all available kernel memory, leading to a denial of service.
(CVE-2010-4249)

Dan Carpenter discovered that the Infiniband driver did not correctly
handle certain requests. A local user could exploit this to crash the
system or potentially gain root privileges. (CVE-2010-4649, CVE-2011-1044)

Dan Rosenberg discovered that XFS did not correctly initialize memory. A
local attacker could make crafted ioctl calls to leak portions of kernel
stack memory, leading to a loss of privacy. (CVE-2011-0711)

Timo Warns discovered that MAC partition parsing routines did not correctly
calculate block counts. A local attacker with physical access could plug in
a specially crafted block device to crash the system or potentially gain
root privileges. (CVE-2011-1010)

Neil Horman discovered that NFSv4 did not correctly handle certain orders
of operation with ACL data. A remote attacker with access to an NFSv4 mount
could exploit this to crash the system, leading to a denial of service.
(CVE-2011-1090)

Vasiliy Kulikov discovered that the netfilter code did not check certain
strings copied from userspace. A local attacker with netfilter access could
exploit this to read kernel memory or crash the system, leading to a denial
of service. (CVE-2011-1170, CVE-2011-1171, CVE-2011-1172, CVE-2011-2534)

Vasiliy Kulikov discovered that the Acorn Universal Networking driver did
not correctly initialize memory. A remote attacker could send specially
crafted traffic to read kernel stack memory, leading to a loss of privacy.
(CVE-2011-1173)

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)

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       2.6.24-29.92
  linux-image-2.6.24-29-generic   2.6.24-29.92
  linux-image-2.6.24-29-hppa32    2.6.24-29.92
  linux-image-2.6.24-29-hppa64    2.6.24-29.92
  linux-image-2.6.24-29-itanium   2.6.24-29.92
  linux-image-2.6.24-29-lpia      2.6.24-29.92
  linux-image-2.6.24-29-lpiacompat  2.6.24-29.92
  linux-image-2.6.24-29-mckinley  2.6.24-29.92
  linux-image-2.6.24-29-openvz    2.6.24-29.92
  linux-image-2.6.24-29-powerpc   2.6.24-29.92
  linux-image-2.6.24-29-powerpc-smp  2.6.24-29.92
  linux-image-2.6.24-29-powerpc64-smp  2.6.24-29.92
  linux-image-2.6.24-29-rt        2.6.24-29.92
  linux-image-2.6.24-29-server    2.6.24-29.92
  linux-image-2.6.24-29-sparc64   2.6.24-29.92
  linux-image-2.6.24-29-sparc64-smp  2.6.24-29.92
  linux-image-2.6.24-29-virtual   2.6.24-29.92
  linux-image-2.6.24-29-xen       2.6.24-29.92

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

References:
  http://www.ubuntu.com/usn/usn-1186-1
  CVE-2010-4073, CVE-2010-4165, CVE-2010-4238, CVE-2010-4249,
  CVE-2010-4649, CVE-2011-0711, CVE-2011-1010, CVE-2011-1044,
  CVE-2011-1090, CVE-2011-1170, CVE-2011-1171, CVE-2011-1172,
  CVE-2011-1173, CVE-2011-2484, CVE-2011-2534

Package Information:
  https://launchpad.net/ubuntu/+source/linux/2.6.24-29.92

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