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National Cyber-Alert System

Vulnerability Summary for CVE-2007-4752

Original release date:09/12/2007
Last revised:03/04/2009
Source: US-CERT/NIST

Overview

ssh in OpenSSH before 4.7 does not properly handle when an untrusted cookie cannot be created and uses a trusted X11 cookie instead, which allows attackers to violate intended policy and gain privileges by causing an X client to be treated as trusted.

Impact

CVSS Severity (version 2.0):
CVSS v2 Base Score:7.5 (HIGH) (AV:N/AC:L/Au:N/C:P/I:P/A:P) (legend)
Impact Subscore: 6.4
Exploitability Subscore: 10.0
CVSS Version 2 Metrics:
Access Vector: Network exploitable
Access Complexity: Low
Authentication: Not required to exploit
Impact Type:Provides user account access, Allows partial confidentiality, integrity, and availability violation; Allows unauthorized disclosure of information; Allows disruption of service

Vendor Statments (disclaimer)

Official Statement from Red Hat (08/28/2008)
This issue did not affect the OpenSSH packages as distributed with Red Hat Enterprise Linux 2.1 or 3, as they do not support Trusted X11 forwarding. For Red Hat Enterprise Linux 4 and 5, this issue was addressed via: https://rhn.redhat.com/errata/RHSA-2008-0855.html

References to Advisories, Solutions, and Tools

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External Source: CONFIRM
Name: https://issues.rpath.com/browse/RPL-1706
Type: Patch Information
Hyperlink:https://issues.rpath.com/browse/RPL-1706
External Source: REDHAT
Name: RHSA-2008:0855
Hyperlink:http://www.redhat.com/support/errata/RHSA-2008-0855.html
External Source: CONFIRM
Name: http://www.openssh.com/txt/release-4.7
Hyperlink:http://www.openssh.com/txt/release-4.7
External Source: VUPEN
Name: ADV-2008-2821
Hyperlink:http://www.frsirt.com/english/advisories/2008/2821
External Source: CONFIRM
Name: http://support.avaya.com/elmodocs2/security/ASA-2008-399.htm
Hyperlink:http://support.avaya.com/elmodocs2/security/ASA-2008-399.htm
External Source: SECUNIA
Name: 32241
Hyperlink:http://secunia.com/advisories/32241
External Source: SECUNIA
Name: 31575
Hyperlink:http://secunia.com/advisories/31575
External Source: OVAL
Name: oval:org.mitre.oval:def:5599
Hyperlink:http://oval.mitre.org/repository/data/getDef?id=oval:org.mitre.oval:def:5599
External Source: FEDORA
Name: FEDORA-2007-715
Hyperlink:https://www.redhat.com/archives/fedora-package-announce/2007-October/msg00214.html
External Source: MISC
Name: https://bugzilla.redhat.com/show_bug.cgi?id=280471
Hyperlink:https://bugzilla.redhat.com/show_bug.cgi?id=280471
External Source: XF
Name: openssh-x11cookie-privilege-escalation(36637)
Hyperlink:http://xforce.iss.net/xforce/xfdb/36637
External Source: UBUNTU
Name: USN-566-1
Hyperlink:http://www.ubuntu.com/usn/usn-566-1
External Source: BID
Name: 25628
Hyperlink:http://www.securityfocus.com/bid/25628
External Source: BUGTRAQ
Name: 20071115 Re: HPSBUX02287 SSRT071485 rev.1 - HP-UX Running HP Secure Shell, Remotely Gain Extended Privileges
Hyperlink:http://www.securityfocus.com/archive/1/archive/1/483748/100/200/threaded
External Source: BUGTRAQ
Name: 20070917 FLEA-2007-0055-1 openssh openssh-client openssh-server gnome-ssh-askpass
Hyperlink:http://www.securityfocus.com/archive/1/archive/1/479760/100/0/threaded
External Source: MANDRIVA
Name: MDKSA-2007:236
Hyperlink:http://www.mandriva.com/security/advisories?name=MDKSA-2007:236
External Source: VUPEN
Name: ADV-2008-0924
Hyperlink:http://www.frsirt.com/english/advisories/2008/0924/references
External Source: VUPEN
Name: ADV-2007-3156
Hyperlink:http://www.frsirt.com/english/advisories/2007/3156
External Source: DEBIAN
Name: DSA-1576
Hyperlink:http://www.debian.org/security/2008/dsa-1576
External Source: SREASON
Name: 3126
Hyperlink:http://securityreason.com/securityalert/3126
External Source: GENTOO
Name: GLSA-200711-02
Hyperlink:http://security.gentoo.org/glsa/glsa-200711-02.xml
External Source: SECUNIA
Name: 30249
Hyperlink:http://secunia.com/advisories/30249
External Source: SECUNIA
Name: 29420
Hyperlink:http://secunia.com/advisories/29420
External Source: SECUNIA
Name: 27399
Hyperlink:http://secunia.com/advisories/27399
External Source: SUSE
Name: SUSE-SR:2007:022
Hyperlink:http://lists.opensuse.org/opensuse-security-announce/2007-10/msg00008.html
External Source: APPLE
Name: APPLE-SA-2008-03-18
Hyperlink:http://lists.apple.com/archives/security-announce/2008/Mar/msg00001.html
External Source: HP
Name: HPSBUX02287
Hyperlink:http://h20000.www2.hp.com/bizsupport/TechSupport/Document.jsp?objectID=c01271085
External Source: CONFIRM
Name: http://docs.info.apple.com/article.html?artnum=307562
Hyperlink:http://docs.info.apple.com/article.html?artnum=307562
External Source: CONFIRM
Name: http://bugs.gentoo.org/show_bug.cgi?id=191321
Hyperlink:http://bugs.gentoo.org/show_bug.cgi?id=191321

Vulnerable software and versions

Nav control imageConfiguration 1
spacerNav control imageOR
spacerspacerNav control image* cpe:/a:openssh:openssh:4.6 and previous versions
* Denotes Vulnerable Software
* Changes related to vulnerability configurations

Technical Details

Vulnerability Type (View All)
CVE Standard Vulnerability Entry:http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-4752