GLSA-200804-03 : OpenSSH: Privilege escalation

Medium Nessus Plugin ID 31834


The remote Gentoo host is missing one or more security-related patches.


The remote host is affected by the vulnerability described in GLSA-200804-03 (OpenSSH: Privilege escalation)

Two issues have been discovered in OpenSSH:
Timo Juhani Lindfors discovered that OpenSSH sets the DISPLAY variable in SSH sessions using X11 forwarding even when it cannot bind the X11 server to a local port in all address families (CVE-2008-1483).
OpenSSH will execute the contents of the '.ssh/rc' file even when the 'ForceCommand' directive is enabled in the global sshd_config (CVE-2008-1657).
Impact :

A local attacker could exploit the first vulnerability to hijack forwarded X11 sessions of other users and possibly execute code with their privileges, disclose sensitive data or cause a Denial of Service, by binding a local X11 server to a port using only one address family.
The second vulnerability might allow local attackers to bypass intended security restrictions and execute commands other than those specified by 'ForceCommand' if they are able to write to their home directory.
Workaround :

There is no known workaround at this time.


All OpenSSH users should upgrade to the latest version:
# emerge --sync # emerge --ask --oneshot --verbose '>=net-misc/openssh-4.7_p1-r6'

See Also

Plugin Details

Severity: Medium

ID: 31834

File Name: gentoo_GLSA-200804-03.nasl

Version: $Revision: 1.13 $

Type: local

Published: 2008/04/11

Modified: 2017/12/14

Dependencies: 12634

Risk Information

Risk Factor: Medium


Base Score: 6.9

Temporal Score: 6

Vector: CVSS2#AV:L/AC:M/Au:N/C:C/I:C/A:C

Temporal Vector: CVSS2#E:ND/RL:OF/RC:C

Vulnerability Information

CPE: p-cpe:/a:gentoo:linux:openssh, cpe:/o:gentoo:linux

Required KB Items: Host/local_checks_enabled, Host/Gentoo/release, Host/Gentoo/qpkg-list

Exploit Available: false

Exploit Ease: No known exploits are available

Patch Publication Date: 2008/04/05

Reference Information

CVE: CVE-2008-1483, CVE-2008-1657

OSVDB: 43745, 43911

GLSA: 200804-03

CWE: 264