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CVE-2007-2241: Sequence of queries can cause a recursive nameserver to exit
Author: Cathy Almond Reference Number: AA-00919 Views: 1501 Created: 2013-05-23 15:43 Last Updated: 2013-05-23 15:43 0 Rating/ Voters
Posting date: 
30 April 2007
Program Impacted: 
Versions affected: 
9.4.0 and Alpha releases of 9.5.0


A sequence of queries can cause a recursive nameserver to exit. While it is unlikely these will occur in normal operation, an attack can use them to cause the affected versions to exit. This attack is a denial of service, and does not allow an attacker to gain control of affected systems.


Disable recursion ('recursion no;' set in named.conf) if it is not required by your configuration.

Active exploits:

None known at this time.


Upgrade to BIND 9.4.1 or BIND 9.5.0.

Related Documents:

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

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Do you still have questions?  Questions regarding this advisory should go to

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

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This Knowledge Base article is the complete and official security advisory document.

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