CVE-2011-3327: Quagga

High severity, CVSS 7.5. EPSS: 7.6% chance of exploitation in the next 30 days.

Heap-based buffer overflow in the ecommunity_ecom2str function in bgp_ecommunity.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.

Affected products

• Quagga Quagga: up to and including 0.99.18; version 0.95 only; version 0.96 only; version 0.96.1 only; version 0.96.2 only; version 0.96.3 only; …

Published 2011-10-10. Last modified 2026-06-16.