CVE-2011-3327: Buffer Overflow
A heap-based buffer overflow flaw was found in the way bgpd daemon of the Quagga routing suite processed BGP UPDATE messages containing unknown ASPATH in Extended Communities Path Attribute. A configured BGP peer could use this flaw to cause the master BGP daemon (bgpd) to crash, or, potentially execute arbitrary code with the privileges of the user running bgpd.
Other sources
Heap-based buffer overflow in the ecommunityecom2str function in bgpecommunity.c in bgpd in Quagga before 0.99.19 allows remote attackers to cause a denial of service (daemon crash) or possibly execute arbitrary code by sending a crafted BGP UPDATE message over IPv4.
— MITRE
Affected Software
Event History
Frequently Asked Questions
What is the severity of CVE-2011-3327?
CVE-2011-3327 has a low severity rating due to the nature of its exploit, which primarily causes denial of service.
How do I fix CVE-2011-3327?
To fix CVE-2011-3327, upgrade Quagga to version 0.99.19 or later.
What versions of Quagga are affected by CVE-2011-3327?
CVE-2011-3327 affects all Quagga versions prior to 0.99.19, including 0.95, 0.96.x, 0.97.x, 0.98.x, and 0.99.x up to 0.99.18.
Can CVE-2011-3327 lead to remote code execution?
No, CVE-2011-3327 is a heap-based buffer overflow vulnerability that primarily leads to a crash, rather than remote code execution.
Is there a workaround for CVE-2011-3327 if I cannot upgrade?
There are no effective workarounds for CVE-2011-3327, hence updating to a patched version is strongly recommended.