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TITLE:
BIND IXFR or DDNS Update Deadlock Denial of Service Vulnerability

SECUNIA ADVISORY ID:
SA43443

VERIFY ADVISORY:
Secunia.com
http://secunia.com/advisories/43443/
Customer Area (Credentials Required)
https://ca.secunia.com/?page=viewadvisory&vuln_id=43443

RELEASE DATE:
2011-03-07

DISCUSS ADVISORY:
http://secunia.com/advisories/43443/#comments

AVAILABLE ON SITE AND IN CUSTOMER AREA:
 * Last Update
 * Popularity
 * Comments
 * Criticality Level
 * Impact
 * Where
 * Solution Status
 * Operating System / Software
 * CVE Reference(s)

http://secunia.com/advisories/43443/

ONLY AVAILABLE IN CUSTOMER AREA:
 * Authentication Level
 * Report Reliability
 * Secunia PoC
 * Secunia Analysis
 * Systems Affected
 * Approve Distribution
 * Remediation Status
 * Secunia CVSS Score
 * CVSS

https://ca.secunia.com/?page=viewadvisory&vuln_id=43443

ONLY AVAILABLE WITH SECUNIA CSI AND SECUNIA PSI:
 * AUTOMATED SCANNING

http://secunia.com/vulnerability_scanning/personal/
http://secunia.com/vulnerability_scanning/corporate/wsus_sccm_3rd_third_party_patching/

DESCRIPTION:
A vulnerability has been reported in BIND, which can be exploited by
malicious people to cause a DoS (Denial of Service).

The vulnerability is caused due to a deadlock error when an
authoritative server processes IXFR or DDNS updates combined with a
query, which can be exploited to stop the server from processing
further requests.

Note: A high workload increases the chance of a deadlock.

The vulnerability is reported in versions 9.7.1 through 9.7.2-P3.

SOLUTION:
Update to version 9.7.3.

PROVIDED AND/OR DISCOVERED BY:
The vendor credits Neustar.

ORIGINAL ADVISORY:
https://www.isc.org/software/bind/advisories/cve-2011-0414

OTHER REFERENCES:
Further details available in Customer Area:
http://secunia.com/products/corporate/EVM/

DEEP LINKS:
Further details available in Customer Area:
http://secunia.com/products/corporate/EVM/

EXTENDED DESCRIPTION:
Further details available in Customer Area:
http://secunia.com/products/corporate/EVM/

EXTENDED SOLUTION:
Further details available in Customer Area:
http://secunia.com/products/corporate/EVM/

EXPLOIT:
Further details available in Customer Area:
http://secunia.com/products/corporate/EVM/

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About:
This Advisory was delivered by Secunia as a free service to help
private users keeping their systems up to date against the latest
vulnerabilities.

Subscribe:
http://secunia.com/advisories/secunia_security_advisories/

Definitions: (Criticality, Where etc.)
http://secunia.com/advisories/about_secunia_advisories/


Please Note:
Secunia recommends that you verify all advisories you receive by
clicking the link.
Secunia NEVER sends attached files with advisories.
Secunia does not advise people to install third party patches, only
use those supplied by the vendor.

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