Executive Summary

Summary
Title OpenSSH: Privilege escalation
Informations
Name GLSA-200804-03 First vendor Publication 2008-04-05
Vendor Gentoo Last vendor Modification 2008-04-05
Severity (Vendor) Normal Revision N/A

Security-Database Scoring CVSS v3

Cvss vector : N/A
Overall CVSS Score NA
Base Score NA Environmental Score NA
impact SubScore NA Temporal Score NA
Exploitabality Sub Score NA
 
Calculate full CVSS 3.0 Vectors scores

Security-Database Scoring CVSS v2

Cvss vector : (AV:L/AC:M/Au:N/C:C/I:C/A:C)
Cvss Base Score 6.9 Attack Range Local
Cvss Impact Score 10 Attack Complexity Medium
Cvss Expoit Score 3.4 Authentication None Required
Calculate full CVSS 2.0 Vectors scores

Detail

Synopsis

Two flaws have been discovered in OpenSSH which could allow local attackers to escalate their privileges.

Background

OpenSSH is a complete SSH protocol implementation that includes an SFTP client and server support.

Description

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.

Resolution

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

References

[ 1 ] CVE-2008-1483 : http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-1483
[ 2 ] CVE-2008-1657 : http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-1657

Availability

This GLSA and any updates to it are available for viewing at the Gentoo Security Website:

http://security.gentoo.org/glsa/glsa-200804-03.xml

Original Source

Url : http://security.gentoo.org/glsa/glsa-200804-03.xml

CWE : Common Weakness Enumeration

% Id Name
100 % CWE-264 Permissions, Privileges, and Access Controls

OVAL Definitions

Definition Id: oval:org.mitre.oval:def:17406
 
Oval ID: oval:org.mitre.oval:def:17406
Title: USN-597-1 -- openssh vulnerability
Description: Timo Juhani Lindfors discovered that the OpenSSH client, when port forwarding was requested, would listen on any available address family.
Family: unix Class: patch
Reference(s): USN-597-1
CVE-2008-1483
 Version: 5
Platform(s): Ubuntu 6.06
Ubuntu 6.10
Ubuntu 7.04
Ubuntu 7.10
 Product(s): openssh
Definition Synopsis:
Definition Id: oval:org.mitre.oval:def:6085
 
Oval ID: oval:org.mitre.oval:def:6085
Title: Security Vulnerability in Solaris SSH May Allow Unauthorized Access to X11 Sessions
Description: OpenSSH 4.3p2, and probably other versions, allows local users to hijack forwarded X connections by causing ssh to set DISPLAY to :10, even when another process is listening on the associated port, as demonstrated by opening TCP port 6010 (IPv4) and sniffing a cookie sent by Emacs.
Family: unix Class: vulnerability
Reference(s): CVE-2008-1483
 Version: 1
Platform(s): Sun Solaris 9
Sun Solaris 10
 Product(s):
Definition Synopsis:

CPE : Common Platform Enumeration

TypeDescriptionCount
Application 7

OpenVAS Exploits

Date Description
2010-05-12 Name : Mac OS X 10.5.5 Update / Security Update 2008-006
File : nvt/macosx_upd_10_5_5_secupd_2008-006.nasl
2010-04-19 Name : OpenSSH X Connections Session Hijacking Vulnerability
File : nvt/gb_openssh_28444.nasl
2010-02-03 Name : Solaris Update for Kernel 122301-48
File : nvt/gb_solaris_122301_48.nasl
2010-02-03 Name : Solaris Update for Kernel 122300-48
File : nvt/gb_solaris_122300_48.nasl
2009-11-17 Name : Mac OS X Version
File : nvt/macosx_version.nasl
2009-10-13 Name : SLES10: Security update for OpenSSH
File : nvt/sles10_openssh0.nasl
2009-10-13 Name : Solaris Update for Kernel 122301-44
File : nvt/gb_solaris_122301_44.nasl
2009-10-13 Name : Solaris Update for /usr/bin/ssh 114356-19
File : nvt/gb_solaris_114356_19.nasl
2009-10-13 Name : Solaris Update for Kernel 122300-44
File : nvt/gb_solaris_122300_44.nasl
2009-10-13 Name : Solaris Update for /usr/bin/ssh 114357-18
File : nvt/gb_solaris_114357_18.nasl
2009-10-10 Name : SLES9: Security update for OpenSSH
File : nvt/sles9p5023096.nasl
2009-09-23 Name : Solaris Update for Kernel 122301-42
File : nvt/gb_solaris_122301_42.nasl
2009-06-03 Name : Solaris Update for Kernel 122300-40
File : nvt/gb_solaris_122300_40.nasl
2009-06-03 Name : Solaris Update for /usr/bin/ssh 114357-17
File : nvt/gb_solaris_114357_17.nasl
2009-06-03 Name : Solaris Update for /usr/bin/ssh 114356-18
File : nvt/gb_solaris_114356_18.nasl
2009-06-03 Name : Solaris Update for Kernel 122301-40
File : nvt/gb_solaris_122301_40.nasl
2009-06-03 Name : Solaris Update for kernel 137137-09
File : nvt/gb_solaris_137137_09.nasl
2009-06-03 Name : Solaris Update for kernel 137138-09
File : nvt/gb_solaris_137138_09.nasl
2009-05-05 Name : HP-UX Update for HP-UX Secure Shell HPSBUX02337
File : nvt/gb_hp_ux_HPSBUX02337.nasl
2009-04-09 Name : Mandriva Update for openssh MDVSA-2008:098 (openssh)
File : nvt/gb_mandriva_MDVSA_2008_098.nasl
2009-04-09 Name : Mandriva Update for openssh MDVSA-2008:078 (openssh)
File : nvt/gb_mandriva_MDVSA_2008_078.nasl
2009-03-23 Name : Ubuntu Update for openssh vulnerability USN-597-1
File : nvt/gb_ubuntu_USN_597_1.nasl
2009-03-23 Name : Ubuntu Update for openssh vulnerabilities USN-649-1
File : nvt/gb_ubuntu_USN_649_1.nasl
2008-09-24 Name : Gentoo Security Advisory GLSA 200804-03 (openssh)
File : nvt/glsa_200804_03.nasl
2008-09-04 Name : FreeBSD Security Advisory (FreeBSD-SA-08:05.openssh.asc)
File : nvt/freebsdsa_openssh4.nasl
2008-05-27 Name : Debian Security Advisory DSA 1576-1 (openssh)
File : nvt/deb_1576_1.nasl
0000-00-00 Name : Slackware Advisory SSA:2008-095-01 openssh
File : nvt/esoft_slk_ssa_2008_095_01.nasl

Open Source Vulnerability Database (OSVDB)

Id Description
43911 OpenSSH ~/.ssh/rc ForceCommand Bypass Arbitrary Command Execution
43745 OpenSSH X11 Forwarding Local Session Hijacking

Nessus® Vulnerability Scanner

Date Description
2017-12-14 Name : The remote openSUSE host is missing a security update.
File : openSUSE-2017-1351.nasl - Type : ACT_GATHER_INFO
2017-12-08 Name : The remote SUSE host is missing one or more security updates.
File : suse_SU-2017-3230-1.nasl - Type : ACT_GATHER_INFO
2014-04-16 Name : The remote AIX host is running a vulnerable version of OpenSSH.
File : aix_ssh_advisory.nasl - Type : ACT_GATHER_INFO
2013-06-29 Name : The remote CentOS host is missing one or more security updates.
File : centos_RHSA-2005-527.nasl - Type : ACT_GATHER_INFO
2011-10-04 Name : The remote SSH service is affected by a security bypass vulnerability.
File : openssh_49.nasl - Type : ACT_GATHER_INFO
2011-08-29 Name : The SSH service running on the remote host has an information disclosure vuln...
File : sunssh_plaintext_recovery.nasl - Type : ACT_GATHER_INFO
2009-09-24 Name : The remote SuSE 9 host is missing a security-related patch.
File : suse9_12122.nasl - Type : ACT_GATHER_INFO
2009-04-23 Name : The remote Mandriva Linux host is missing one or more security updates.
File : mandriva_MDVSA-2008-078.nasl - Type : ACT_GATHER_INFO
2009-04-23 Name : The remote Mandriva Linux host is missing one or more security updates.
File : mandriva_MDVSA-2008-098.nasl - Type : ACT_GATHER_INFO
2009-04-23 Name : The remote Ubuntu host is missing one or more security-related patches.
File : ubuntu_USN-649-1.nasl - Type : ACT_GATHER_INFO
2008-09-16 Name : The remote host is missing a Mac OS X update that fixes various security issues.
File : macosx_10_5_5.nasl - Type : ACT_GATHER_INFO
2008-09-16 Name : The remote host is missing a Mac OS X update that fixes various security issues.
File : macosx_SecUpd2008-006.nasl - Type : ACT_GATHER_INFO
2008-08-20 Name : The remote SSH service is affected by multiple vulnerabilities.
File : attachmate_reflection_70_sp1.nasl - Type : ACT_GATHER_INFO
2008-05-19 Name : The remote Debian host is missing a security-related update.
File : debian_DSA-1576.nasl - Type : ACT_GATHER_INFO
2008-04-11 Name : The remote SuSE 10 host is missing a security-related patch.
File : suse_openssh-5122.nasl - Type : ACT_GATHER_INFO
2008-04-11 Name : The remote openSUSE host is missing a security update.
File : suse_openssh-5148.nasl - Type : ACT_GATHER_INFO
2008-04-11 Name : The remote openSUSE host is missing a security update.
File : suse_openssh-5149.nasl - Type : ACT_GATHER_INFO
2008-04-11 Name : The remote Gentoo host is missing one or more security-related patches.
File : gentoo_GLSA-200804-03.nasl - Type : ACT_GATHER_INFO
2008-04-11 Name : The remote Slackware host is missing a security update.
File : Slackware_SSA_2008-095-01.nasl - Type : ACT_GATHER_INFO
2008-04-04 Name : The remote Ubuntu host is missing one or more security-related patches.
File : ubuntu_USN-597-1.nasl - Type : ACT_GATHER_INFO
2008-04-03 Name : The remote SSH service is prone to an X11 session hijacking vulnerability.
File : openssh_50.nasl - Type : ACT_GATHER_INFO
2005-10-11 Name : The remote Red Hat host is missing one or more security updates.
File : redhat-RHSA-2005-527.nasl - Type : ACT_GATHER_INFO

Alert History

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Date Informations
2014-02-17 11:35:42
  • Multiple Updates