CVE-2007-0493: Denial of service via unspecified vectors that cause "dereference a freed fetch context"

A logic error can cause the named process to exit unintentionally.

CVE: 

CVE-2007-0493  

Posting date: 

30 Jan 2007

Program Impacted: 

BIND

Versions affected:

9.3.0, 9.3.1, 9.3.2, 9.3.3, Alpha and Beta versions of 9.40, Alpha versions of 9.5.0

Severity: 

Low

Exploitable: 

Remotely

Description:

It is possible for the named to dereference (read) a freed fetch context. This can cause named to exit unintentionally.

Workarounds:

Disable or restrict recursion (to limit exposure).

Active exploits:

None known at this time.

Solution:   

Upgrade to BIND 9.2.8, 9.3.4, or 9.4.0, or 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-00917 is the complete and official security advisory document.

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