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

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:
http://secunia.com/psi

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

TITLE:
Kerberos KDC Two Memory Corruption Vulnerabilities

SECUNIA ADVISORY ID:
SA50041

VERIFY ADVISORY:
Secunia.com
http://secunia.com/advisories/50041/
Customer Area (Credentials Required)
https://ca.secunia.com/?page=viewadvisory&vuln_id=50041

RELEASE DATE:
2012-08-01

DISCUSS ADVISORY:
http://secunia.com/advisories/50041/#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/50041/

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=50041

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:
Two vulnerabilities have been reported in Kerberos, which can be
exploited by malicious people to potentially compromise a vulnerable
system.

1) An error within the "kdc_handle_protected_negotiation()" function
(src/kdc/kdc_util.c) when creating a checksum does not properly
verify the key type and can be exploited to free an uninitialized
pointer via a specially crafted AS-REQ.

This vulnerability is reported in krb5-1.8 and later only.

2) An uninitialized pointer dereference error within the
"finish_process_as_req()" function (src/kdc/do_as_req.c) can be
exploited to corrupt the memory by sending a specially crafted
AS-REQ.

This vulnerability is reported in krb5-1.10 and later only.

Successful exploitation of these vulnerabilities may allow execution
of arbitrary code.

SOLUTION:
Apply the patch (fixes are scheduled for the upcoming release of
krb5-1.10.3 and krb5-1.9.5).

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

PROVIDED AND/OR DISCOVERED BY:
The vendor credits Emmanuel Bouillon, NCI Agency.

ORIGINAL ADVISORY:
http://web.mit.edu/kerberos/www/advisories/MITKRB5-SA-2012-001.txt

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

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

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

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

EXPLOIT:
Further details available in Customer Area:
http://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:
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.

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