BIND security update protects against serious server crash

http://www.theregister.co.uk/2011/11/16/bind_in_a_bind_again/

By Richard Chirgwin
The Register
16th November 2011

Updated - The Internet Systems Consortium is advising BIND users to 
update immediately to protect against a bug that may already be under 
attack to crash vulnerable servers.

The ISC says an unidentified network event caused BIND 9 resolvers to 
cache an invalid record, and when subsequent queries requested the 
invalid record, the servers crashed with the following assertion 
failure:

INSIST(! dns_rdataset_isassociated(sigrdataset)).

It’s also apparently being exploited to attack networks, with multiple 
members of the BIND users email list from Germany, France and the US 
reporting simultaneous crashes across multiple servers.

The ISC describes the bug as a potential zero-day exploit with no 
workaround, and urges immediate upgrade to BIND 9.8.1-P1, 9.7.4-P1, 
9.6-ESV-R5-P1, or 9.4-ESV-R5-P1.

[...]

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