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CVE-2010-3613: cache incorrectly allows a ncache entry and a rrsig for the same type
Author: Cathy Almond Reference Number: AA-00938 Views: 4970 Created: 2013-05-24 12:53 Last Updated: 2013-05-24 12:53 0 Rating/ Voters

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
Severity: 
High
Exploitable: 
Remotely

Description:

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: http://nvd.nist.gov/cvss.cfm?version=2&vector=(AV:N/AC:L/Au:N/C:N/I:N/A:C)

Workarounds:  

None.

Active exploits:

None known at this time.

Solution: 

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

Related Documents:

See our BIND Security Matrix for a complete listing of Security Vulnerabilities and versions affected.

If you'd like more information on our Forum or product support please visit www.isc.org/support.

Do you still have questions?  Questions regarding this advisory should go to security-officer@isc.org

Note: ISC patches only currently supported versions. When possible we indicate EOL versions affected.

ISC Security Vulnerability Disclosure Policy:  Details of our current security advisory policy and practice can be found here: https://www.isc.org/security-vulnerability-disclosure-policy

This Knowledge Base article https://kb.isc.org/article/AA-00938 is the complete and official security advisory document.

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