Secunia Security Advisory - A vulnerability has been reported in Kerberos, which can be exploited by malicious people to potentially compromise a vulnerable system.
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TITLE:
Kerberos KDC "prepare_error_as" Double-Free Vulnerability
SECUNIA ADVISORY ID:
SA43783
VERIFY ADVISORY:
Secunia.com
http://secunia.com/advisories/43783/
Customer Area (Credentials Required)
https://ca.secunia.com/?page=viewadvisory&vuln_id=43783
RELEASE DATE:
2011-03-17
DISCUSS ADVISORY:
http://secunia.com/advisories/43783/#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/43783/
ONLY AVAILABLE IN CUSTOMER AREA:
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* Report Reliability
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https://ca.secunia.com/?page=viewadvisory&vuln_id=43783
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 Kerberos, which can be exploited
by malicious people to potentially compromise a vulnerable system.
The vulnerability is caused due to an error in KDC within the
"prepare_error_as()" function in src/kdc/do_as_req.c when handling
AS-REQ request and can be exploited to trigger a double-free
condition by sending specially crafted AS-REQ requests.
Successful exploitation may allow execution of arbitrary code, but
requires that the Public Key Cryptography for Initial Authentication
(PKINIT) capability is enabled.
The vulnerability is reported in KDC in releases krb5-1.7 and later.
SOLUTION:
Apply patch.
Further details available in Customer Area:
http://secunia.com/products/corporate/EVM/
PROVIDED AND/OR DISCOVERED BY:
Cameron Meadors, Red Hat
ORIGINAL ADVISORY:
http://web.mit.edu/kerberos/www/advisories/MITKRB5-SA-2011-003.txt
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:
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