=========================================================================Ubuntu Security Notice USN-1261-1
November 14, 2011

quagga 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:

Quagga could be made to crash or run programs if it received specially
crafted network traffic.

Software Description:
- quagga: BGP/OSPF/RIP routing daemon

Details:

Riku Hietamäki, Tuomo Untinen and Jukka Taimisto discovered that Quagga
incorrectly handled Link State Update messages with invalid lengths. A
remote attacker could use this flaw to cause Quagga to crash, resulting in
a denial of service. (CVE-2011-3323)

Riku Hietamäki, Tuomo Untinen and Jukka Taimisto discovered that Quagga
incorrectly handled certain IPv6 Database Description messages. A remote
attacker could use this flaw to cause Quagga to crash, resulting in a
denial of service. (CVE-2011-3324)

Riku Hietamäki, Tuomo Untinen and Jukka Taimisto discovered that Quagga
incorrectly handled certain IPv4 packets. A remote attacker could use this
flaw to cause Quagga to crash, resulting in a denial of service.
(CVE-2011-3325)

Riku Hietamäki, Tuomo Untinen and Jukka Taimisto discovered that Quagga
incorrectly handled invalid Link State Advertisement (LSA) types. A remote
attacker could use this flaw to cause Quagga to crash, resulting in a
denial of service. (CVE-2011-3326)

Riku Hietamäki, Tuomo Untinen and Jukka Taimisto discovered that Quagga
incorrectly handled certain BGP UPDATE messages. A remote attacker could
use this flaw to cause Quagga to crash, or possibly execute arbitrary
code. (CVE-2011-3327)

Update instructions:

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

Ubuntu 11.10:
  quagga                          0.99.18-2ubuntu0.1

Ubuntu 11.04:
  quagga                          0.99.17-4ubuntu1.1

Ubuntu 10.10:
  quagga                          0.99.17-1ubuntu0.2

Ubuntu 10.04 LTS:
  quagga                          0.99.15-1ubuntu0.3

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

References:
  
  CVE-2011-3323, CVE-2011-3324, CVE-2011-3325, CVE-2011-3326,
  CVE-2011-3327

Package Information:
  https://launchpad.net/ubuntu/+source/quagga/0.99.18-2ubuntu0.1
  https://launchpad.net/ubuntu/+source/quagga/0.99.17-4ubuntu1.1
  https://launchpad.net/ubuntu/+source/quagga/0.99.17-1ubuntu0.2
  https://launchpad.net/ubuntu/+source/quagga/0.99.15-1ubuntu0.3