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.

*CVSS:

Base Score:	2.8
Access Vector:	Remote
Access Complexity:	High
Authentication:	Not Required
Confidentiality Impact:	None
Integrity Impact:	Partial
Availability Impact:	None

Temporal Score:	2.1
Exploitability:	Unproven
Remediation Level:	Official-Fix
Report Confidence:	Confirmed

Consequences:

Bypass Security

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.

References:

IBM Systems Support Web site: Support for HMC.
OpenSSH Web site: OpenSSH 4.5/4.5p1.
OpenSSH Web site: OpenSSH.
SourceForge.net: copssh - Secure and Remote Software Distribution.
SourceForge.net: Files: Secure and Remote Software Distribution - File Release Notes and Changelog - Release Name: 1.4.1.
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

Platforms Affected:

ITeF!x 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
MandrakeSoft Mandrake Linux Corporate Server 4.0 X86_64
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 Desktop
RedHat Enterprise Linux 4 AS
RedHat Enterprise Linux 4 ES
RedHat Enterprise Linux 4 WS
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

Reported:

Nov 07, 2006

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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 IBM be held liable for any damages whatsoever arising out of or in connection with the use or spread of this information.

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