radvd vulnerabilities

10 November 2011

radvd vulnerabilities

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

• Ubuntu 11.10
• Ubuntu 11.04
• Ubuntu 10.10
• Ubuntu 10.04 LTS

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, resulting in a denial of service. (CVE-2011-3604)

Vasiliy Kulikov discovered that radvd incorrectly handled delays when used in unicast mode, which is not the default in Ubuntu. If used in unicast mode, a remote attacker could cause radvd outages, resulting in a denial of service. (CVE-2011-3605)

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

To update your system, please follow these instructions: https://wiki.ubuntu.com/Security/Upgrades.

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

References

• CVE-2011-3601
• CVE-2011-3602
• CVE-2011-3604
• CVE-2011-3605