ISS X-Force Database: openssh-x11cookie-privilege-escalation(36637): OpenSSH X11 cookie privilege escalation

OpenSSH X11 cookie privilege escalation

openssh-x11cookie-privilege-escalation (36637)

Medium Risk

Description:

OpenSSH could allow a remote attacker on the adjacent network to gain elevated privileges. Trusted X11 cookies are created when untrusted cookies cannot be created, which could allow an attacker to bypass security restrictions and gain elevated privileges using an untrusted X client.

*CVSS:

Base Score:	5.8
Access Vector:	Adjacent Network
Access Complexity:	Low
Authentication:	None
Confidentiality Impact:	Partial
Integrity Impact:	Partial
Availability Impact:	Partial

Temporal Score:	4.3
Exploitability:	Unproven
Remediation Level:	Official-Fix
Report Confidence:	Confirmed

Consequences:

Gain Privileges

Remedy:

Upgrade to the latest version of OpenSSH (4.7 or later), available from the OpenSSH Web site. See References.

For rPath Linux:
Refer to rPath Linux Issue RPL-1706 for patch, upgrade, or suggested workaround information. See References.

For Mac OS X:
Apply Security Update 2008-002, available from the Apple Web site. See References.

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

References:

Apple Web site: About Security Update 2008-002.
BugTraq Mailing List, Mon Nov 12 2007 - 13:57:33 CST: HPSBUX02287 SSRT071485 rev.1 - HP-UX Running HP Secure Shell, Remotely Gain Extended Privileges.
ESB-2008.0123: AIX OpenSSH creates trusted X11 cookie instead of untrusted.
IBM APAR OA25412: OA25412: DOC UPDATE FOR "IBM PORTED TOOLS FOR Z/OS" OPENSSH 5655M2301.
OpenSSH Web site: OpenSSH.
OpenSSH Web site: OpenSSH 4.7/4.7p1.
OpenSSH Web site: OpenSSH 4.7 Release notes: Prevent ssh(1) from using a trusted X11 cookie if creation of an untrusted cookie fails.
rPath Linux Issue RPL-1706: openssh uses a trusted X11cookie if creation of an untrusted cookie fails CVE-2007-4752.
ASA-2007-497: HP-UX Running HP Secure Shell, Remotely Gain Extended Privileges (HPSBUX02287)
ASA-2008-399: openssh security update (RHSA-2008-0855)
BID-25628: OpenSSH X11 Cookie Local Authentication Bypass Vulnerability
CVE-2007-4752: 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.
DSA-1576: openssh -- predictable random number generator
GLSA-200711-02: OpenSSH: Security bypass
MDKSA-2007:236: Updated openssh packages fix X11 cookie vulnerability
RHSA-2008-0855: Critical: openssh security update
SA29420: Mac OS X Security Update Fixes Multiple Vulnerabilities
SA32241: Avaya Products Red Hat Tampered OpenSSH Packages
SUSE-SR:2007:022: SUSE Security Summary Report

Platforms Affected:

Apple Mac OS X 10.4.11
Apple Mac OS X 10.5.2
Apple Mac OS X Server 10.4.11
Apple Mac OS X Server 10.5.2
Canonical Ubuntu 6.06 LTS
Canonical Ubuntu 6.10
Canonical Ubuntu 7.04
Canonical Ubuntu 7.10
Debian Debian Linux 4.0
Gentoo Linux
HP HP-UX B.11.11
HP HP-UX B.11.23
HP HP-UX B.11.31
IBM AIX 5.2
IBM AIX 5.3
IBM AIX 6.1
IBM zOS
MandrakeSoft Mandrake Linux 2007 X86_64
MandrakeSoft Mandrake Linux 2007
MandrakeSoft Mandrake Linux 2007.1
MandrakeSoft Mandrake Linux 2007.1 X86_64
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 4.1p1
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
RedHat Enterprise Linux 4 WS
RedHat Enterprise Linux 4 AS
RedHat Enterprise Linux 4 ES
RedHat Enterprise Linux 4 Desktop
RedHat Enterprise Linux 4.5.z ES
RedHat Enterprise Linux 4.5.z AS
RedHat Enterprise Linux 5
RedHat Enterprise Linux 5 Client
Turbolinux Turbolinux 10 Server
Turbolinux Turbolinux 10 Server x64 Ed
Turbolinux Turbolinux FUJI
Turbolinux Turbolinux Appliance Server 2.0

Reported:

Sep 11, 2007

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