CVE-2007-2241: Sequence of queries can cause a recursive nameserver to exit

AA-00919

Posting date: 
30 April 2007
Program Impacted: 
BIND
Versions affected: 
9.4.0 and Alpha releases of 9.5.0
Severity: 
High
Exploitable: 
Remotely

Description:

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.

Workarounds:

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

Active exploits:

None known at this time.

Solution: 

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.

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-00919 is the complete and official security advisory document.

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