ISS X-Force Database: openssh-x11forwarding-info-disclosure(43940): OpenSSH X11 forwarding information disclosure

OpenSSH X11 forwarding information disclosure

openssh-x11forwarding-info-disclosure (43940)

Low Risk

Description:

OpenSSH could allow a local attacker to obtain sensitive information, caused by an error when binding to previously bound ports that have the SO_REUSEADDR option enabled and the sshd_config X11UseLocalhost option set to no. An attacker could exploit this vulnerability via man-in-the-middle techniques to obtain sensitive information on systems where effective user-id or overlapping bind address checks are not present.

*CVSS:

Base Score:	1.2
Access Vector:	Local
Access Complexity:	High
Authentication:	None
Confidentiality Impact:	Partial
Integrity Impact:	None
Availability Impact:	None

Temporal Score:	.9
Exploitability:	Unproven
Remediation Level:	Official-Fix
Report Confidence:	Confirmed

Consequences:

Obtain Information

Remedy:

Upgrade to the latest version of OpenSSH (5.1 or later), available from the OpenSSH Web site. See References.

References:

OpenSSH Changelog, Release 5.1: Changes since OpenSSH 5.0.
OpenSSH Web site: OpenSSH Security.
OpenSSH Web site: OpenSSH.
BID-30339: OpenSSH 'X11UseLocalhost' X11 Forwarding Session Hijacking Vulnerability
CVE-2008-3259: OpenSSH before 5.1 sets the SO_REUSEADDR socket option when the X11UseLocalhost configuration setting is disabled, which allows local users on some platforms to hijack the X11 forwarding port via a bind to a single IP address, as demonstrated on the HP-UX platform.
SA31179: OpenSSH "X11UseLocalhost" X11 Forwarding Security Issue
SECTRACK ID: 1020537: OpenSSH on HP-UX Lets Local Users Hijack X11 Sessions
VUPEN/ADV-2008-2148: OpenSSH X11UseLocalhost X11 Forwarding Session Hijacking Issue

Platforms Affected:

OpenBSD OpenSSH 1
OpenBSD OpenSSH 1.2
OpenBSD OpenSSH 1.2.1
OpenBSD OpenSSH 1.2.2
OpenBSD OpenSSH 1.2.27
OpenBSD OpenSSH 1.2.3
OpenBSD OpenSSH 1.3
OpenBSD OpenSSH 1.5
OpenBSD OpenSSH 1.5.7
OpenBSD OpenSSH 1.5.8
OpenBSD OpenSSH 2
OpenBSD OpenSSH 2.1
OpenBSD OpenSSH 2.1.1
OpenBSD OpenSSH 2.2
OpenBSD OpenSSH 2.2.0
OpenBSD OpenSSH 2.3
OpenBSD OpenSSH 2.3.0
OpenBSD OpenSSH 2.3.1
OpenBSD OpenSSH 2.5
OpenBSD OpenSSH 2.5.1
OpenBSD OpenSSH 2.5.2
OpenBSD OpenSSH 2.9
OpenBSD OpenSSH 2.9.9
OpenBSD OpenSSH 2.9.9p2
OpenBSD OpenSSH 2.9p1
OpenBSD OpenSSH 2.9p2
OpenBSD OpenSSH 3.0
OpenBSD OpenSSH 3.0.1
OpenBSD OpenSSH 3.0.1p1
OpenBSD OpenSSH 3.0.2
OpenBSD OpenSSH 3.0.2p1
OpenBSD OpenSSH 3.0p1
OpenBSD OpenSSH 3.1
OpenBSD OpenSSH 3.1p1
OpenBSD OpenSSH 3.2
OpenBSD OpenSSH 3.2.1
OpenBSD OpenSSH 3.2.2
OpenBSD OpenSSH 3.2.2p1
OpenBSD OpenSSH 3.2.3p1
OpenBSD OpenSSH 3.3
OpenBSD OpenSSH 3.3p1
OpenBSD OpenSSH 3.4
OpenBSD OpenSSH 3.4p1
OpenBSD OpenSSH 3.5
OpenBSD OpenSSH 3.5p1
OpenBSD OpenSSH 3.6
OpenBSD OpenSSH 3.6.1
OpenBSD OpenSSH 3.6.1p1
OpenBSD OpenSSH 3.6.1p2
OpenBSD OpenSSH 3.7
OpenBSD OpenSSH 3.7.1
OpenBSD OpenSSH 3.7.1p1
OpenBSD OpenSSH 3.7.1p2
OpenBSD OpenSSH 3.8
OpenBSD OpenSSH 3.8.1
OpenBSD OpenSSH 3.8.1p1
OpenBSD OpenSSH 3.9
OpenBSD OpenSSH 3.9.1
OpenBSD OpenSSH 3.9.1p1
OpenBSD OpenSSH 4
OpenBSD OpenSSH 4.0
OpenBSD OpenSSH 4.0p1
OpenBSD OpenSSH 4.1
OpenBSD OpenSSH 4.1p1
OpenBSD OpenSSH 4.2
OpenBSD OpenSSH 4.2p1
OpenBSD OpenSSH 4.3
OpenBSD OpenSSH 4.3p1
OpenBSD OpenSSH 4.3p2
OpenBSD OpenSSH 4.4
OpenBSD OpenSSH 4.5
OpenBSD OpenSSH 4.6
OpenBSD OpenSSH 4.7
OpenBSD OpenSSH 4.8
OpenBSD OpenSSH 4.9
OpenSSH OpenSSH 5.0

Reported:

Jul 21, 2008

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