69609 : MIT Kerberos 5 (krb5) Checksum Acceptability Weakness RC4 Key GSS Token Forgery Issue
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Views This Week	Views All Time	Added to OSVDB	Last Modified	Modified (since 2008)	Percent Complete
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Timeline

Disclosure Date
2010-11-30

Description

[MIT Kerberos 5 (krb5)contains a flaw related to the acceptability of checksums. This may allow a remote attacker to forge GSS tokens via an unkeyed checksum, gain privileges via an unkeyed PAC checksum (the attacker must be authenticated in this case), or have other unspecified impact via a KrbFastArmoredReq checksum based on an RC4 key.

Classification

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

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.x
		1.8.0
		1.8.1
		1.8.2
		1.8.3

References

CVE ID: 2010-1324 (see also: NVD)
Secunia Advisory ID: 42396 42399 42420 42436 42558 42746 43015 43814 44391 47658
Related OSVDB ID: 69607 69608 69610
Vendor Specific Advisory URL: http://h20000.www2.hp.com/bizsupport/TechSupport/Document.jsp?objectID=c02657328
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
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
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 = 4.3
Source: nvd.nist.gov | Generated: 2010-12-02 | Disagree?

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