ISS X-Force Database: openssh-separation-verificaton-weakness(30120): OpenSSH privilege separation monitor authentication verification weakness

OpenSSH privilege separation monitor authentication verification weakness

openssh-separation-verificaton-weakness (30120)

Low Risk

Description:

The OpenSSH sshd privilege separation monitor could allow a remote attacker to bypass security restrictions, caused by an unspecified error that results in a weak authentication verification process.

Note: This security weakness requires the use of other vulnerabilities to be exploited to bypass security.

Platforms Affected:

copssh, copssh before 1.4.1
MandrakeSoft, Mandrake Linux 2006 X86_64
MandrakeSoft, Mandrake Linux 2006
MandrakeSoft, Mandrake Linux 2007 X86_64
MandrakeSoft, Mandrake Linux 2007
MandrakeSoft, Mandrake Linux Corporate Server 3.0 X86_64
MandrakeSoft, Mandrake Linux Corporate Server 3.0
MandrakeSoft, Mandrake Linux Corporate Server 4.0 X86_64
MandrakeSoft, Mandrake Linux Corporate Server 4.0
MandrakeSoft, Mandrake Multi Network Firewall 2.0
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
OpenPKG, OpenPKG CURRENT
OpenPKG, OpenPKG Enterprise E1.0-SOLID
RedHat, Enterprise Linux 3 Desktop
RedHat, Enterprise Linux 3 AS
RedHat, Enterprise Linux 3 ES
RedHat, Enterprise Linux 3 WS
RedHat, Enterprise Linux 4 AS
RedHat, Enterprise Linux 4 WS
RedHat, Enterprise Linux 4 Desktop
RedHat, Enterprise Linux 4 ES
Turbolinux, Turbolinux 10 Desktop
Turbolinux, Turbolinux 10 F...
Turbolinux, Turbolinux 10 Server
Turbolinux, Turbolinux 10 Server x64 Ed
Turbolinux, Turbolinux 8 Server
Turbolinux, Turbolinux FUJI
Turbolinux, Turbolinux Home
Turbolinux, Turbolinux Multimedia
Turbolinux, Turbolinux Personal
Turbolinux, Turbolinux Appliance Server 1.0 Hosting Ed
Turbolinux, Turbolinux Appliance Server 1.0 Workgroup Ed
Turbolinux, Turbolinux Appliance Server 2.0

Remedy:

For OpenSSH:
Upgrade to the latest version of OpenSSH (version 4.5 or later), available from the OpenSSH Web site. See References.

For copssh:
Upgrade to the latest version of copssh (version 1.4.1 or later), available from the SourceForge.net Web site. See References.

For Red Hat Linux:
Refer to RHSA-2006:0738-4 for patch, upgrade, or suggested workaround information. See References.

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

Consequences:

Bypass Security

References:

IBM Systems Support Web site, Support for HMC at https://www14.software.ibm.com/webapp/set2/sas/f/hmc/power5/install/v61.Readme.html#MH01110.
OpenSSH Web site, OpenSSH 4.5/4.5p1 at http://www.openssh.org/txt/release-4.5.
OpenSSH Web site, OpenSSH at http://openssh.com/.
SourceForge.net, copssh - Secure and Remote Software Distribution at http://sourceforge.net/project/showfiles.php?group_id=69227.
SourceForge.net: Files, Secure and Remote Software Distribution - File Release Notes and Changelog - Release Name: 1.4.1 at http://sourceforge.net/project/shownotes.php?release_id=461854&group_id=69227.
ASA-2007-048: openssh security update (RHSA-2006-0738)
BID-20956: OpenSSH Privilege Separation Key Signature Weakness
CVE-2006-5794: Unspecified vulnerability in the sshd Privilege Separation Monitor in OpenSSH before 4.5 causes weaker verification that authentication has been successful, which might allow attackers to bypass authentication. NOTE: as of 20061108, it is believed that this issue is only exploitable by leveraging vulnerabilities in the unprivileged process, which are not known to exist.
MDKSA-2006:204: Updated openssh packages fix vulnerability
OpenPKG-SA-2006.032: OpenSSH
RHSA-2006-0738: Low: openssh security update
SA22771: OpenSSH Privilege Separation Monitor Weakness
SA22772: cwRsync OpenSSL Vulnerabilities and OpenSSH Weakness
SA22773: copssh Privilege Separation Monitor Weakness
SA23680: VMWare ESX Server Multiple Vulnerabilities
SA24055: Avaya Products OpenSSH Privilege Separation Monitor Weakness
SECTRACK ID: 1017183: OpenSSH Privilege Separation Monitor Validation Error May Cause the Monitor to Fail to Properly Control the Unprivileged Process
SUSE-SR:2006:026: SUSE Security Summary Report

Reported:

Nov 07, 2006

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