Secunia Security Advisory - Two vulnerabilities have been reported in Kerberos, which can be exploited by malicious people to potentially compromise a vulnerable system.
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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:
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* Criticality Level
* Impact
* Where
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* Operating System / Software
* CVE Reference(s)
http://secunia.com/advisories/50041/
ONLY AVAILABLE IN CUSTOMER AREA:
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https://ca.secunia.com/?page=viewadvisory&vuln_id=50041
ONLY AVAILABLE WITH SECUNIA CSI AND SECUNIA PSI:
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http://secunia.com/vulnerability_scanning/personal/
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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/
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About:
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