CVE-2010-3613: cache incorrectly allows a ncache entry and a rrsig for the same type
Failure to clear existing RRSIG records when a NO DATA is negatively cached could cause subsequent lookups to crash named.
Posting Date: 01 Dec 2010
Program Impacted: BIND
Versions Affected: 9.0.x to 9.7.2-P2, 9.4-ESV to 9.4-ESV-R3, 9.6-ESV to 9.6-ESV-R2
Adding certain types of signed negative responses to cache doesn't clear any matching RRSIG records already in cache. A subsequent lookup of the cached data can cause named to crash (INSIST).
Impact and Risk Assessment
The INSIST crashes the server.
This vulnerability affects recursive nameservers irrespective of whether DNSSEC validation is enabled or disabled.
CVSS Score: 7.8
CVSS Equation: (AV:N/AC:L/Au:N/C:N/I:N/A:C)
For more information on the Common Vulnerability Scoring System and to obtain your specific environmental score please visit: https://nvd.nist.gov/cvss.cfm?version=2&vector=(AV:N/AC:L/Au:N/C:N/I:N/A:C)
Active exploits: None known at this time.
The versions listed below are supported by ISC. All other versions are End of Life, and will not be patched. If you are running a version not listed below, you should upgrade as soon as possible.
- 9.4.x: upgrade to 9.4-ESV-R4, or newer
- 9.6.x: upgrade to 9.6.2-P3 or newer
- 9.6-ESV: upgrade to 9.6-ESV-R3 or newer
- 9.7.x: upgrade to 9.7.2-P3
Acknowledgements: Shinichi Furuso
Document Revision History
24 Nov 2010: Corrected/Updated: Versions affected, CVSS Score, Impact and Risk Assessment and Solution 14 Dec 2010: Updated Versions Affected, Solution and Acknowledgement
See our BIND Security Vulnerability Matrix for a complete listing of Security Vulnerabilities and versions affected.
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