----------------------------------------------------------------------

We are millions!  Join us to protect all Pc's Worldwide.
Download the new Secunia PSI 3.0 available in 5 languages and share it with your friends:
https://secunia.com/psi

----------------------------------------------------------------------

TITLE:
ISC BIND Bad Cache Assertion Failure and TCP Query Denial of Service
Vulnerabilities

SECUNIA ADVISORY ID:
SA50020

VERIFY ADVISORY:
Secunia.com
https://secunia.com/advisories/50020/
Customer Area (Credentials Required)
https://ca.secunia.com/?page=viewadvisory&vuln_id=50020

RELEASE DATE:
2012-07-25

DISCUSS ADVISORY:
https://secunia.com/advisories/50020/#comments

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

https://secunia.com/advisories/50020/

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=50020

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

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

DESCRIPTION:
Two vulnerabilities have been reported in ISC BIND, which can be
exploited by malicious people to cause a DoS (Denial of Service).

1) An error when handling certain queries can be exploited to use a
"bad cache" data structure and trigger an assertion.

Successful exploitation of this vulnerability requires that DNSSEC
validation is enabled.

This vulnerability is reported in versions 9.6-ESV-R1 through
9.6-ESV-R7-P1, 9.7.1 through 9.7.6-P1, 9.8.0 through 9.8.3-P1, and
9.9.0 through 9.9.1-P1.

2) A memory leak error when processing TCP queries can be exploited
to increase the number of misplaced ns_client objects and trigger an
out-of-memory condition.

This vulnerability is reported in versions 9.9.0 through 9.9.1-P1.

SOLUTION:
Update to version 9.9.1-P2, 9.8.3-P2, 9.7.6-P2, or 9.6-ESV-R7-P2.

PROVIDED AND/OR DISCOVERED BY:
The vendor credits:
1) Einar Lonn, IIS.se
2) Kevin Sheehan, Infoblox, Inc. and Anand Buddhdev, RIPE NCC.

ORIGINAL ADVISORY:
https://www.isc.org/software/aftr/advisories/cve-2012-3817
https://www.isc.org/software/bind/advisories/cve-2012-3868

OTHER REFERENCES:
Further details available in Customer Area:
https://secunia.com/vulnerability_intelligence/

DEEP LINKS:
Further details available in Customer Area:
https://secunia.com/vulnerability_intelligence/

EXTENDED DESCRIPTION:
Further details available in Customer Area:
https://secunia.com/vulnerability_intelligence/

EXTENDED SOLUTION:
Further details available in Customer Area:
https://secunia.com/vulnerability_intelligence/

EXPLOIT:
Further details available in Customer Area:
https://secunia.com/vulnerability_intelligence/

----------------------------------------------------------------------

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:
https://secunia.com/advisories/secunia_security_advisories/

Definitions: (Criticality, Where etc.)
https://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.

----------------------------------------------------------------------