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BIND 8.4.4 and 8.4.5 vulnerable to buffer overflow in q_usedns

Vulnerability Note VU#327633

Original Release Date: 2005-01-25 | Last Revised: 2005-03-18

Overview

A vulnerability in the BIND name server could allow a remote attacker to cause a denial of service against an affected system.

Description

The Berkeley Internet Name Domain (BIND) is a popular Domain Name System (DNS) implementation from Internet Systems Consortium (ISC). A buffer overflow error exists in the handling of the q_usedns array used by the server to track nameservers and addresses that have been queried. This vulnerability only affects BIND versions 8.4.4 and 8.4.5.

Impact

A remote attacker may be able to cause the name server daemon to crash, thereby causing a denial of service for DNS operations.

Solution

Apply a patch from the vendor

Patches have been released in response to this issue. Please see the Systems Affected section of this document.

Upgrade

Users who compile their own versions of BIND from the original ISC source code are encouraged to upgrade to BIND version 8.4.6 which includes a patch for this issue.

Workarounds


ISC recommends that users who are unable to apply the patch disable recursion and glue fetching.

Vendor Information

327633
 

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References

Acknowledgements

Thanks to Joao Damas of the Internet Systems Consortium for reporting this vulnerability.

This document was written by Chad Dougherty based on information provided by ISC.

Other Information

CVE IDs: CVE-2005-0033
Severity Metric: 1.91
Date Public: 2005-01-25
Date First Published: 2005-01-25
Date Last Updated: 2005-03-18 16:36 UTC
Document Revision: 24

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