OpenSSH Kerberos Arbitrary Privilege Elevation Vulnerability

BID:3560

Info

OpenSSH Kerberos Arbitrary Privilege Elevation Vulnerability

Bugtraq ID: 3560
Class: Unknown
CVE:
Remote: Yes
Local: No
Published: Nov 19 2001 12:00AM
Updated: Nov 19 2001 12:00AM
Credit: This vulnerability was originally announced to the OpenSSH Announcement List <[email protected]> by the OpenSSH Development Team, and was posted to Bugtraq by Jonas Eriksson <[email protected]> on November 19, 2001.
Vulnerable: OpenBSD OpenSSH 3.0 p1
OpenBSD OpenSSH 3.0
- OpenBSD OpenBSD 2.9
- OpenBSD OpenBSD 2.8
- OpenBSD OpenBSD 2.7
- OpenBSD OpenBSD 2.6
Not Vulnerable: OpenBSD OpenSSH 3.0.1 p1
+ Trustix Secure Linux 1.5
+ Trustix Secure Linux 1.2
+ Trustix Secure Linux 1.1
OpenBSD OpenSSH 3.0.1
+ FreeBSD FreeBSD 4.4
+ FreeBSD FreeBSD 4.3
- OpenBSD OpenBSD 2.9
- OpenBSD OpenBSD 2.8
- OpenBSD OpenBSD 2.7
- OpenBSD OpenBSD 2.6

Discussion

OpenSSH Kerberos Arbitrary Privilege Elevation Vulnerability

OpenSSH is a freely available implementation of the SSH client-server protocol. It is distributed and maintained by the OpenSSH team.

A problem with the software has been discovered that could allow remote users to gain unauthorized access. The level of privilege that can be obtained through this vulnerability is currently unknown. The problem is related to the Kerberos V authentication handling by the implementation.

Under some circumstances, it may be possible for an arbitrary user to gain access to a system. The only affected OpenSSH implementations are those that have compiled into the program the Kerberos V compatibility code. This is not usually built with a default compilation of OpenSSH.

Solution / Fix

OpenSSH Kerberos Arbitrary Privilege Elevation Vulnerability

Solution:
The vendor has made upgrades available.

OpenSSH packages for Trustix Secure Linux do not have Kerberos support enabled. However, fixes have been provided for those users who wish to enable Kerberos support.


OpenBSD OpenSSH 3.0

OpenBSD OpenSSH 3.0 p1

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