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CVE-2002-1221: BIND 8 fails to properly dereference cache SIG RR elements with invalid expiry times
Author: Cathy Almond Reference Number: AA-00954 Views: 2619 Created: 2013-05-29 14:07 Last Updated: 2014-10-28 14:16 0 Rating/ Voters

De-referencing null pointer for certain signature expire values.

CVE: 
CVE-2002-1221
CERT
VU#581682
Posting date: 
12 Nov 2002
Program Impacted: 
BIND
Versions affected: 
8.3.0 - 8.3.3
Severity: 
Serious
Exploitable: 
Remotely
Description: 

Remote attackers can cause a denial of service (crash) via SIG RR elements with invalid expiry times, which are removed from the internal BIND database and later cause a null dereference.

Workarounds: 

Disable recursion, if possible.

Active exploits: 
None known at this time.
Solution: 

Upgrade to BIND 8.3.4 or later

Acknowledgements:

ISC would like to thank Internet Security Systems for bringing this to our attention.



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