OpenSSH 'X11UseLocalhost' X11 Forwarding Session Hijacking Vulnerability

BID:30339

Info

OpenSSH 'X11UseLocalhost' X11 Forwarding Session Hijacking Vulnerability

Bugtraq ID: 30339
Class: Design Error
CVE: CVE-2008-3259
Remote: No
Local: Yes
Published: Jul 21 2008 12:00AM
Updated: May 07 2015 05:25PM
Credit: sway2004009
Vulnerable: OpenSSH OpenSSH 5.0
IBM AIX 6.1
IBM AIX 5.3
IBM AIX 5.2
Not Vulnerable: OpenSSH OpenSSH 5.1

Discussion

OpenSSH 'X11UseLocalhost' X11 Forwarding Session Hijacking Vulnerability

OpenSSH is prone to a vulnerability that allows attackers to hijack forwarded X connections.

NOTE: For an exploit to succeed, the underlying operating system must allow rebinding of a port without checking the effective userid or the overlapping of addresses. Also, the 'X11UseLocalhost' option must be disabled. This option is enabled by default.

The issue affects OpenSSH 5.0; other versions may also be vulnerable.

Exploit / POC

OpenSSH 'X11UseLocalhost' X11 Forwarding Session Hijacking Vulnerability

A specific exploit is not required. The attacker uses standard tools to exploit this issue.

Solution / Fix

OpenSSH 'X11UseLocalhost' X11 Forwarding Session Hijacking Vulnerability

Solution:
The vendor has released updates. Please see the references for more information.


IBM AIX 6.1

IBM AIX 5.3

References

OpenSSH 'X11UseLocalhost' X11 Forwarding Session Hijacking Vulnerability

References:
© CVE.report 2026 |

Use of this information constitutes acceptance for use in an AS IS condition. 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. It is the responsibility of user to evaluate the accuracy, completeness or usefulness of any information, opinion, advice or other content. EACH USER WILL BE SOLELY RESPONSIBLE FOR ANY consequences of his or her direct or indirect use of this web site. ALL WARRANTIES OF ANY KIND ARE EXPRESSLY DISCLAIMED. This site will NOT BE LIABLE FOR ANY DIRECT, INDIRECT or any other kind of loss.

CVE, CWE, and OVAL are registred trademarks of The MITRE Corporation and the authoritative source of CVE content is MITRE's CVE web site. This site includes MITRE data granted under the following license.

Free CVE JSON API cve.report/api

CVE.report and Source URL Uptime Status status.cve.report