OpenSSH ForceCommand directive command execution

openssh-forcecommand-command-execution (41549)

High Risk

Description:

OpenSSH could allow a local attacker to execute arbitrary commands on the system, caused by an error when using the shd_config ForceCommand directive. An attacker could exploit this vulnerability via ~/.ssh/rc to execute arbitrary commands on the system.

Platforms Affected:

• Apple, Mac OS X 10.4.11
• Apple, Mac OS X 10.5
• Apple, Mac OS X 10.5.1
• Apple, Mac OS X 10.5.2
• Apple, Mac OS X 10.5.3
• Apple, Mac OS X 10.5.4
• Apple, Mac OS X Server 10.4.11
• Apple, Mac OS X Server 10.5
• Apple, Mac OS X Server 10.5.1
• Apple, Mac OS X Server 10.5.2
• Apple, Mac OS X Server 10.5.3
• Apple, Mac OS X Server 10.5.4
• Attachmate, Reflection for Secure IT 7.0 SP1
• Canonical, Ubuntu 6.06 LTS
• Canonical, Ubuntu 7.04
• Canonical, Ubuntu 7.10
• Gentoo, Linux
• MandrakeSoft, Mandrake Linux 2007.1 X86_64
• MandrakeSoft, Mandrake Linux 2007.1
• MandrakeSoft, Mandrake Linux 2008.0
• MandrakeSoft, Mandrake Linux 2008.0 X86_64
• MandrakeSoft, Mandrake Linux 2008.1 X86_64
• MandrakeSoft, Mandrake Linux 2008.1
• 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 2.1
• OpenBSD, OpenSSH 2.1.1
• OpenBSD, OpenSSH 2.1.1p4
• OpenBSD, OpenSSH 2.2
• OpenBSD, OpenSSH 2.2.0p1
• OpenBSD, OpenSSH 2.3
• OpenBSD, OpenSSH 2.3.0p1
• OpenBSD, OpenSSH 2.5
• OpenBSD, OpenSSH 2.5.1
• OpenBSD, OpenSSH 2.5.1p1
• OpenBSD, OpenSSH 2.5.1p2
• OpenBSD, OpenSSH 2.5.2
• OpenBSD, OpenSSH 2.5.2p1
• OpenBSD, OpenSSH 2.5.2p2
• OpenBSD, OpenSSH 2.9
• OpenBSD, OpenSSH 2.9.9
• OpenBSD, OpenSSH 2.9.9p1
• 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 3.2.2
• OpenBSD, OpenSSH 3.2.2p1
• OpenBSD, OpenSSH 3.2.3
• 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 4.0
• 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 4.4p1
• OpenBSD, OpenSSH 4.5
• OpenBSD, OpenSSH 4.5p1
• OpenBSD, OpenSSH 4.6
• OpenBSD, OpenSSH 4.6p1
• OpenBSD, OpenSSH 4.7
• OpenBSD, OpenSSH 4.7p1
• OpenBSD, OpenSSH 4.9
• Turbolinux, Turbolinux 11 Server
• Turbolinux, Turbolinux 11 Server x64 Ed

Remedy:

Upgrade to the latest version of OpenSSH (4.9 or later), available from the OpenSSH Web site. See References.

For other distributions:
Apply the appropriate update for your system. See References.

Consequences:

Gain Privileges

References:

• Apple Web site, About the security content of Mac OS X v10.5.5 and Security Update 2008-006 at http://support.apple.com/kb/HT3137.
• Attachmate Technical Note 2374, Reflection for Secure IT UNIX Client and Server 7.0 Service Pack 1 (SP1): Fixes and Features at http://support.attachmate.com/techdocs/2374.html.
• OpenBSD 4.3 errata , 001: SECURITY FIX: March 30, 2008 at http://www.openbsd.org/errata43.html#001_openssh.
• OpenSSH Changelog, Release 4.7, Changes since OpenSSH 4.7 at http://www.openssh.com/txt/release-4.9.
• OpenSSH Web site, OpenSSH at http://www.openssh.com.
• BID-28531: OpenSSH ForceCommand Command Execution Weakness
• BID-30723: Attachmate Reflection for Secure IT Multiple Unspecified Security Vulnerabilities
• CVE-2008-1657: OpenSSH 4.4 up to versions before 4.9 allows remote authenticated users to bypass the sshd_config ForceCommand directive by modifying the .ssh/rc session file.
• GLSA-200804-03: OpenSSH: Privilege escalation
• MDVSA-2008:098: Updated openssh packages fix vulnerability
• SA29602: OpenSSH ForceCommand Bypass Weakness
• SA29609: OpenBSD OpenSSH ForceCommand Bypass Weakness
• SA31531: Reflection for Secure IT Multiple Vulnerabilities
• SA31882: Apple Mac OS X Security Update Fixes Multiple Vulnerabilities
• SECTRACK ID: 1019733: OpenSSH Unsafe Default Configuration May Let Local Users Execute Arbitrary Commands
• SUSE-SR:2008:009: SUSE Security Summary Report

Reported:

Mar 30, 2008

The information within this database may change without notice. 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. In no event shall the author/distributor (IBM Internet Security Systems X-Force) be held liable for any damages whatsoever arising out of or in connection with the use or spread of this information.

For corrections or additions please email xforce@iss.net

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