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Ubuntu Security Notice USN-1189-1

Ubuntu Security Notice USN-1189-1
Posted Aug 20, 2011
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 1189-1 - 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. 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. Various other issues were also addressed.

tags | advisory, kernel, local, vulnerability
systems | linux, ubuntu
advisories | 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
MD5 | 63adb7c7efa179525da379ee2e712499

Ubuntu Security Notice USN-1189-1

Change Mirror Download
==========================================================================
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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