4893 : FreeBSD k5su Group Check Failure
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Views This Week	Views All Time	Added to OSVDB	Last Modified	Modified (since 2008)	Percent Complete
3	239	over 7 years ago	over 3 years ago	0 times	90%

Timeline

Disclosure Date	Exploit Publish Date
2002-05-20	2002-05-20

Description

The k5su utility contains a flaw that may allow a local user to gain access to unauthorized privileges. The issue is triggered when a local user who does not have 'wheel' group membership executes k5su and enters the root password. This flaw results in complete control of the host by the attacker.

Classification

Location: Local Access Required
Attack Type: Authentication Management
Impact: Loss of Confidentiality, Loss of Integrity, Loss of Availability
Exploit: Exploit Public
Disclosure: OSVDB Verified

Technical

The user must have the root password to complete this exploit. Also note that k5su is part of the Kerberos 5 package, which is not included in a default FreeBSD installation.

Solution

Currently, there are no known upgrades or patches to correct this issue. It is possible to disable k5su by removing the suid bit. The suid for k5su is removed by default in subsequent releases as well as in the STABLE branch after 2002-05-15.

Products

FreeBSD Project	Kerberos 5	4.4-RELEASE
		4.5-RELEASE
		STABLE (RELENG_4*)

References

CVE ID: 2002-0755 (see also: NVD)
Bugtraq ID: 4777
Related OSVDB ID: 4892
ISS X-Force ID: 9125
Vendor Specific Advisory URL: ftp://ftp.freebsd.org/pub/FreeBSD/CERT/advisories/FreeBSD-SA-02:24.k5su.asc
Vendor URL: http://freebsd.org

Credit

- papipsychohotmail.com -

CVSSv2 Score

CVSSv2 Base Score = 7.2
Source: nvd.nist.gov | Generated: 2003-12-31 | Disagree?

Blogs

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