Ubuntu 11.10 LTS: USN-1257-1 Critical: radvd Denial Of Service

ubuntu

November 10, 2011

radvd could be made to crash or overwrite certain files if it received specially crafted network traffic.

Summary

radvd could be made to crash or overwrite certain files if it received

specially crafted network traffic.

Software Description:

- radvd: Router Advertisement Daemon

Details:

Vasiliy Kulikov discovered that radvd incorrectly parsed the

ND_OPT_DNSSL_INFORMATION option. A remote attacker could exploit this with

a specially-crafted request and cause the radvd daemon to crash, or

possibly execute arbitrary code. The default compiler options for affected

releases should reduce the vulnerability to a denial of service. This issue

only affected Ubuntu 11.04 and 11.10. (CVE-2011-3601)

Vasiliy Kulikov discovered that radvd incorrectly filtered interface names

when creating certain files. A local attacker could exploit this to

overwrite certain files on the system, bypassing intended permissions.

(CVE-2011-3602)

Vasiliy Kulikov discovered that radvd incorrectly handled certain lengths.

A remote attacker could exploit this to cause the radvd daemon to crash,

resulti...

Read the Full Advisory

Topics Covered

security advisory denial of service critical file overwrite Ubuntu network exploit radvd

Update Instructions

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

Ubuntu 11.10:
  radvd                           1:1.8-1ubuntu0.1

Ubuntu 11.04:
  radvd                           1:1.7-1ubuntu0.1

Ubuntu 10.10:
  radvd                           1:1.6-1ubuntu0.1

Ubuntu 10.04 LTS:
  radvd                           1:1.3-1.1ubuntu0.1

In general, a standard system update will make all the necessary changes.