Unspecified vulnerability in Cisco IOS 12.0 through 12.4 allows context-dependent attackers to cause a denial of service (device restart and BGP routing table rebuild) via certain regular expressions in a “show ip bgp regexp” command. NOTE: unauthenticated remote attacks are possible in environments with anonymous telnet and Looking Glass access.
forum.cisco.com/eforum/servlet/NetProf?page=netprof&forum=Network%20Infrastructure&topic=WAN%2C%20Routing%20and%20Switching&CommCmd=MB%3Fcmd%3Ddisplay_location%26location%3D.1ddf7bc9
secunia.com/advisories/26798
www.cisco.com/en/US/products/products_security_response09186a00808bb91c.html
www.heise-security.co.uk/news/94526/
www.securityfocus.com/bid/25352
www.securitytracker.com/id?1018685
www.vupen.com/english/advisories/2007/3136
puck.nether.net/pipermail/cisco-nsp/2007-August/043002.html
puck.nether.net/pipermail/cisco-nsp/2007-August/043010.html