Quagga: Multiple vulnerabilities

Background

Quagga is a free routing daemon replacing Zebra supporting RIP, OSPF and BGP.

Description

Multiple vulnerabilities have been discovered in Quagga. Please review the CVE identifiers referenced below for details.

Impact

A BGP peer could send a Route-Refresh message with specially-crafted ORF record, which can cause Quagga’s bgpd to crash or possibly execute arbitrary code with the privileges of the user running Quagga’s bgpd; a BGP update AS path request with unknown AS type, or malformed AS-Pathlimit or Extended-Community attributes could lead to Denial of Service (daemon crash), an error in bgpd when handling AS_PATH attributes within UPDATE messages can be exploited to cause a heap-based buffer overflow resulting in a crash of the daemon and disruption of IPv4 routing, two errors in ospf6d and ospfd can each be exploited to crash the daemon and disrupt IP routing.

Workaround

There is no known workaround at this time.

Resolution

All Quagga users should upgrade to the latest version:

 # emerge --sync
 # emerge --ask --oneshot --verbose ">=net-misc/quagga-0.99.20"