Quagga Routing Suite: Multiple vulnerabilities

1. Gentoo Linux Security Advisory

Advisory Reference	GLSA 200605-15 / quagga
Release Date	May 21, 2006
Latest Revision	May 21, 2006: 01
Impact	normal
Exploitable	remote

Package	Vulnerable versions	Unaffected versions	Architecture(s)
net-misc/quagga	< 0.98.6-r1	>= 0.98.6-r1	All supported architectures

Related bugreports: #132353

Synopsis

Quagga's RIP daemon allows the injection of routes and the disclosure of routing information. The BGP daemon is vulnerable to a Denial of Service.

2. Impact Information

Background

The Quagga Routing Suite implements three major routing protocols: RIP (v1/v2/v3), OSPF (v2/v3) and BGP4.

Description

Konstantin V. Gavrilenko discovered two flaws in the Routing Information Protocol (RIP) daemon that allow the processing of RIP v1 packets (carrying no authentication) even when the daemon is configured to use MD5 authentication or, in another case, even if RIP v1 is completely disabled. Additionally, Fredrik Widell reported that the Border Gateway Protocol (BGP) daemon contains a flaw that makes it lock up and use all available CPU when a specific command is issued from the telnet interface.

Impact

By sending RIP v1 response packets, an unauthenticated attacker can alter the routing table of a router running Quagga's RIP daemon and disclose routing information. Additionally, it is possible to lock up the BGP daemon from the telnet interface.

3. Resolution Information

Workaround

There is no known workaround at this time.

Resolution

All Quagga users should upgrade to the latest version:

Code Listing 3.1: Resolution

# emerge --sync
# emerge --ask --oneshot --verbose ">=net-misc/quagga-0.98.6-r1"

4. References

Page updated May 21, 2006

Summary: This is a Gentoo Linux Security Advisory

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