69607 : MIT Kerberos 5 Key Distribution Center (KDC) TGS Request TGT Credentials Inner Request KrbFastReq Forgery Issue
Printer | http://osvdb.org/69607 | Email This | Edit Vulnerability

Views This Week	Views All Time	Added to OSVDB	Last Modified	Modified (since 2008)	Percent Complete
17	1508	over 2 years ago	10 months ago	4 times	100%

Timeline

Disclosure Date
2010-11-30

Description

MIT Kerberos 5 (krb5) contains a flaw related to the Key Distrubiton Center (KDC). The KDC does not properly restrict the use of TGT credentials for armoring TGS requests. The issue is triggered when a remote, authenticated attacker rewrites an inner request (or 'KrbFastReq Forgery Issue']. This may allow the attacker to impersonate a client.

Classification

Location: Remote / Network Access
Attack Type: Cryptographic
Impact: Loss of Integrity
Solution: Patch / RCS
Exploit: Exploit Unknown
Disclosure: Vendor Verified
OSVDB: Authentication Required

Solution

Currently, there are no known workarounds or upgrades to correct this issue. However, MIT has released a patch to address this vulnerability. Check the vendor advisory or solution in the references section.

Products

MIT

Kerberos 5

1.7

References

CVE ID: 2010-4021 (see also: NVD)
Secunia Advisory ID: 42396 42399 42420 42436 42558 42746 43814 44391 47658
Related OSVDB ID: 69608 69609 69610
Vendor Specific News/Changelog Entry: http://lists.opensuse.org/opensuse-security-announce/2010-12/msg00006.html
http://web.mit.edu/kerberos/advisories/MITKRB5-SA-2010-007.txt
http://www.gentoo.org/security/en/glsa/glsa-201201-13.xml
Mail List Post: http://seclists.org/bugtraq/2010/Nov/229
Vendor Specific Advisory URL: http://support.apple.com/kb/HT1222
http://support.apple.com/kb/HT4581
http://www.debian.org/security/2010/dsa-2129
http://www.ubuntu.com/usn/usn-1030-1
https://rhn.redhat.com/errata/RHSA-2010-0925.html
https://rhn.redhat.com/errata/RHSA-2010-0926.html
News Article: http://www.scmagazineus.com/apple-issues-slew-of-patches/article/198899/
Other Advisory URL: http://www.vmware.com/security/advisories/VMSA-2011-0007.html

Credit

Not Available

CVSSv2 Score

CVSSv2 Base Score = 2.1
Source: nvd.nist.gov | Generated: 2010-12-02 | Disagree?

Comments

Add Comment Hide Add Comment

No Comments.

The database information may change without any notice. Use of the information constitutes acceptance for use in an AS IS condition, and there are NO warranties, implied or otherwise, with regard to this information or its use. Any use of this information is at the user's risk. In no event shall the copyright holder or distributor (OSVDB or OSF) be held liable for any damages whatsoever arising out of or in connection with the use or spread of this information.