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Quagga "reachable/unreachable" NLRI Attributes Denial of Service

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Release Date:  2007-04-10    Last Update:  2007-04-18    Views:  10,207

Secunia Advisory SA24808

Where:

From remote

Impact:

DoS

Solution Status:

Unpatched

Software:

CVE Reference(s):

Description


Paul Jakma has reported a vulnerability in Quagga, which can be exploited by malicious users to cause a DoS (Denial of Service).

The vulnerability is caused due to bgpd not checking the length information of the "MP_UNREACH_NLRI" and "MP_REACH_NLRI" attributes. This can be exploited to cause an assertion error or out of bounds read by sending a specially crafted UPDATE message.

Successful exploitation requires that the attacker is configured as peer of the victim system.

The vulnerability is reported in all existing Quagga versions.


Solution:
Connect to trusted peers only.

Provided and/or discovered by:
Paul Jakma

Original Advisory:
http://www.quagga.net/news2.php?y=2007&m=4&d=8#id1176073740
http://bugzilla.quagga.net/show_bug.cgi?id=354

Deep Links:
Links available to Secunia VIM customers

Do you have additional information related to this advisory?

Please provide information about patches, mitigating factors, new versions, exploits, faulty patches, links, and other relevant data by posting comments to this Advisory. You can also send this information to vuln@secunia.com

Subject: Quagga "reachable/unreachable" NLRI Attributes Denial of Service

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