Quagga contains a flaw that may allow an unauthenticated attacker to inject RIP routes into the 'RIPd' service. The issue is triggered when the service is configured with MD5 authentication but no specific RIP version in the configuration file. It is then possible to send unauthenticated RIPv1 'RESPONSE' packets that will be accepted by the service, causing a manipulation of the RIP routing table and resulting in a loss of integrity.
Classification
Location:
Remote / Network Access
Attack Type:
Input Manipulation
Impact:
Loss of Integrity
Exploit:
Exploit Public
Disclosure:
OSVDB Verified
Solution
Upgrade to version 0.98 release candidate 20060504 or 0.99 release candidate 20060504, respectively, or higher, as it has been reported to fix this vulnerability. It is also possible to correct the flaw by filtering RIPv1 traffic on a need-to-access basis.