OpenSSH X11 Cookie Local Authentication Bypass Vulnerability

BID:25628

Info

OpenSSH X11 Cookie Local Authentication Bypass Vulnerability

Bugtraq ID: 25628
Class: Access Validation Error
CVE: CVE-2007-4752
Remote: No
Local: Yes
Published: Sep 04 2007 12:00AM
Updated: Oct 14 2008 05:37PM
Credit: Jan Pechanec is credited with the discovery and correction of this issue.
Vulnerable: Ubuntu Ubuntu Linux 7.10 sparc
Ubuntu Ubuntu Linux 7.10 powerpc
Ubuntu Ubuntu Linux 7.10 i386
Ubuntu Ubuntu Linux 7.10 amd64
Ubuntu Ubuntu Linux 7.04 sparc
Ubuntu Ubuntu Linux 7.04 powerpc
Ubuntu Ubuntu Linux 7.04 i386
Ubuntu Ubuntu Linux 7.04 amd64
Ubuntu Ubuntu Linux 6.10 sparc
Ubuntu Ubuntu Linux 6.10 powerpc
Ubuntu Ubuntu Linux 6.10 i386
Ubuntu Ubuntu Linux 6.10 amd64
Ubuntu Ubuntu Linux 6.06 LTS sparc
Ubuntu Ubuntu Linux 6.06 LTS powerpc
Ubuntu Ubuntu Linux 6.06 LTS i386
Ubuntu Ubuntu Linux 6.06 LTS amd64
SuSE SUSE Linux Enterprise Server 8
+ Linux kernel 2.4.21
+ Linux kernel 2.4.19
SuSE SUSE Linux Enterprise Server 10 SP1
SuSE SUSE Linux Enterprise Server 10
SuSE SUSE Linux Enterprise SDK 10.SP1
SuSE SUSE Linux Enterprise SDK 10
SuSE SUSE Linux Enterprise SDK 10
SuSE Suse Linux Enterprise Desktop 10 SP1
SuSE Suse Linux Enterprise Desktop 10
SuSE Linux Enterprise Server 9
SuSE Linux Enterprise Server 10.SP1
SuSE Linux Enterprise Server 10
SuSE Linux Desktop 10
SuSE Linux 10.1 x86-64
SuSE Linux 10.1 x86
SuSE Linux 10.1 ppc
SuSE Linux 10.0 x86-64
SuSE Linux 10.0 x86
SuSE Linux 10.0 ppc
Slackware Linux 10.2
Slackware Linux 10.1
Slackware Linux 10.0
Slackware Linux 9.1
Slackware Linux 9.0
Slackware Linux 8.1
Slackware Linux 12.0
Slackware Linux 11.0
Slackware Linux -current
S.u.S.E. UnitedLinux 1.0
S.u.S.E. SuSE Linux School Server for i386
S.u.S.E. SUSE LINUX Retail Solution 8.0
S.u.S.E. SuSE Linux Openexchange Server 4.0
S.u.S.E. openSUSE 10.3
S.u.S.E. openSUSE 10.2
S.u.S.E. Open-Enterprise-Server 0
S.u.S.E. Novell Linux POS 9
S.u.S.E. Novell Linux Desktop 9
S.u.S.E. Linux Professional 10.0 OSS
S.u.S.E. Linux Professional 10.0
S.u.S.E. Linux Professional 10.2 X86 64
S.u.S.E. Linux Professional 10.2
S.u.S.E. Linux Professional 10.1
S.u.S.E. Linux Personal 10.0 OSS
S.u.S.E. Linux Personal 10.2 X86 64
S.u.S.E. Linux Personal 10.2
S.u.S.E. Linux Personal 10.1
rPath rPath Linux 1
Redhat Enterprise Linux WS 4
Redhat Enterprise Linux ES 4.5.z
Redhat Enterprise Linux ES 4
Redhat Enterprise Linux Desktop 5 client
Redhat Enterprise Linux AS 4.5.z
Redhat Enterprise Linux 5 server
Redhat Desktop 4.0
OpenSSH OpenSSH 4.6
Mandriva Linux Mandrake 2007.1 x86_64
Mandriva Linux Mandrake 2007.1
Mandriva Linux Mandrake 2007.0 x86_64
Mandriva Linux Mandrake 2007.0
MandrakeSoft Corporate Server 4.0 x86_64
MandrakeSoft Corporate Server 3.0 x86_64
MandrakeSoft Corporate Server 3.0
MandrakeSoft Corporate Server 4.0
IBM AIX 6.1
IBM AIX 5.3
IBM AIX 5.2
HP HP-UX Secure Shell A.04.70.005 0
HP HP-UX Secure Shell A.04.70.004 0
HP HP-UX Secure Shell A.04.70.003 0
HP HP-UX B.11.31
HP HP-UX B.11.23
HP HP-UX B.11.11
GNOME gnome-ssh-askpass 0
Gentoo Linux 2007.0
Gentoo Linux
Foresight Linux Foresight Linux 1.1
Cosmicperl Directory Pro 10.0.3
Avaya Voice Portal 4.1
Avaya Voice Portal 4.0
Avaya Voice Portal 3.0
Avaya SIP Enablement Services 3.1.2
Avaya SIP Enablement Services 4.0
Avaya Proactive Contact 4.0
Avaya Proactive Contact 3.0
Avaya Proactive Contact 0
Avaya Predictive Dialer (PDS) APC 3.0
Avaya Predictive Dialer 0
Avaya Messaging Storage Server MSS 3.0
Avaya Messaging Storage Server MM3.0
Avaya Messaging Storage Server 4.0
Avaya Messaging Storage Server 3.1
Avaya Messaging Storage Server 2.0
Avaya Messaging Storage Server 1.0
Avaya Messaging Storage Server
Avaya Message Networking MN 3.1
Avaya Message Networking 3.1
Avaya Message Networking
Avaya Meeting Exchange - Enterprise Edition
Avaya Meeting Exchange 5.0 .0.52
Avaya Meeting Exchange 5.0
Avaya Intuity AUDIX LX 2.0
Avaya Intuity AUDIX
Avaya EMMC 1.021
Avaya EMMC 1.017
Avaya EMMC 0
Avaya Communication Manager 4.0.3 SP1
Avaya Communication Manager 3.1.4 SP2
+ Avaya Communication Manager Server DEFINITY Server SI/CS
+ Avaya Communication Manager Server S8100
+ Avaya Communication Manager Server S8300
+ Avaya Communication Manager Server S8500
+ Avaya Communication Manager Server S8700
Avaya Communication Manager 2.0.1
Avaya Communication Manager 2.0
Avaya Communication Manager 1.3.1
+ Avaya Communication Manager Server DEFINITY Server R10
+ Avaya Communication Manager Server DEFINITY Server R10
+ Avaya Communication Manager Server DEFINITY Server R11
+ Avaya Communication Manager Server DEFINITY Server R9
+ Avaya Communication Manager Server DEFINITY Server R9
+ Avaya Communication Manager Server S8300
+ Avaya Communication Manager Server S8300
+ Avaya Communication Manager Server S8500
+ Avaya Communication Manager Server S8500
+ Avaya Communication Manager Server S8700
+ Avaya Communication Manager Server S8700
Avaya Communication Manager 1.1
Avaya Communication Manager 5.1
+ Avaya Communication Manager Server DEFINITY Server SI/CS
+ Avaya Communication Manager Server S8100
+ Avaya Communication Manager Server S8300
+ Avaya Communication Manager Server S8500
+ Avaya Communication Manager Server S8700
Avaya Communication Manager 5.0 SP3
Avaya Communication Manager 5.0
Avaya Communication Manager 4.0
Avaya Communication Manager 3.1
Avaya Communication Manager 3.0
Avaya Communication Manager 2.2
Avaya Communication Manager 2.1
Avaya Aura SIP Enablement Services 5.0
Avaya Aura Application Enablement Services 4.2.1
Avaya AES 3.1.6
Apple Mac OS X Server 10.5.2
Apple Mac OS X Server 10.5.1
Apple Mac OS X Server 10.4.11
Apple Mac OS X Server 10.4.10
Apple Mac OS X Server 10.4.9
Apple Mac OS X Server 10.4.8
Apple Mac OS X Server 10.4.7
Apple Mac OS X Server 10.4.6
Apple Mac OS X Server 10.4.5
Apple Mac OS X Server 10.4.4
Apple Mac OS X Server 10.4.3
Apple Mac OS X Server 10.4.2
Apple Mac OS X Server 10.4.1
Apple Mac OS X Server 10.4
Apple Mac OS X Server 10.3.9
Apple Mac OS X Server 10.3.8
Apple Mac OS X Server 10.3.7
Apple Mac OS X Server 10.3.6
Apple Mac OS X Server 10.3.5
Apple Mac OS X Server 10.3.4
Apple Mac OS X Server 10.3.3
Apple Mac OS X Server 10.3.2
Apple Mac OS X Server 10.3.1
Apple Mac OS X Server 10.3
Apple Mac OS X Server 10.2.8
Apple Mac OS X Server 10.2.7
Apple Mac OS X Server 10.2.6
Apple Mac OS X Server 10.2.5
Apple Mac OS X Server 10.2.4
Apple Mac OS X Server 10.2.3
Apple Mac OS X Server 10.2.2
Apple Mac OS X Server 10.2.1
Apple Mac OS X Server 10.2
Apple Mac OS X Server 10.1.5
Apple Mac OS X Server 10.1.4
Apple Mac OS X Server 10.1.3
Apple Mac OS X Server 10.1.2
Apple Mac OS X Server 10.1.1
Apple Mac OS X Server 10.1
Apple Mac OS X Server 10.0
Apple Mac OS X Server 10.5
Apple Mac OS X 10.5.2
Apple Mac OS X 10.5.1
Apple Mac OS X 10.4.11
Apple Mac OS X 10.4.10
Apple Mac OS X 10.4.9
Apple Mac OS X 10.4.8
Apple Mac OS X 10.4.7
Apple Mac OS X 10.4.6
Apple Mac OS X 10.4.5
Apple Mac OS X 10.4.4
Apple Mac OS X 10.4.3
Apple Mac OS X 10.4.2
Apple Mac OS X 10.4.1
Apple Mac OS X 10.4
Apple Mac OS X 10.3.9
Apple Mac OS X 10.3.8
Apple Mac OS X 10.3.7
Apple Mac OS X 10.3.6
Apple Mac OS X 10.3.5
Apple Mac OS X 10.3.4
Apple Mac OS X 10.3.3
Apple Mac OS X 10.3.2
Apple Mac OS X 10.3.1
Apple Mac OS X 10.3
Apple Mac OS X 10.2.8
Apple Mac OS X 10.2.7
Apple Mac OS X 10.2.6
Apple Mac OS X 10.2.5
Apple Mac OS X 10.2.4
Apple Mac OS X 10.2.3
Apple Mac OS X 10.2.2
Apple Mac OS X 10.2.1
Apple Mac OS X 10.2
Apple Mac OS X 10.1.5
Apple Mac OS X 10.1.4
Apple Mac OS X 10.1.3
Apple Mac OS X 10.1.2
Apple Mac OS X 10.1.1
Apple Mac OS X 10.1
Apple Mac OS X 10.1
Apple Mac OS X 10.0.4
Apple Mac OS X 10.0.3
Apple Mac OS X 10.0.2
Apple Mac OS X 10.0.1
Apple Mac OS X 10.0
Apple Mac OS X 10.5
Not Vulnerable: OpenSSH OpenSSH 4.7

Discussion

OpenSSH X11 Cookie Local Authentication Bypass Vulnerability

OpenSSH is prone to a local authentication-bypass vulnerability because the software fails to properly manage trusted and untrusted X11 cookies.

Successfully exploiting this issue allows local attackers to potentially launch a forwarded X11 session through SSH in an unauthorized manner. Further details are currently unavailable. We will update this BID as more information emerges.

This issue affects OpenSSH 4.6; previous versions may be affected as well.

Exploit / POC

OpenSSH X11 Cookie Local Authentication Bypass Vulnerability

Reportedly, by filling the '/tmp' partition, a local attacker may trigger this issue by causing the cookie-creation step in OpenSSH to fail and fall back to using trusted cookies. Symantec has not tested or confirmed this.

Solution / Fix

OpenSSH X11 Cookie Local Authentication Bypass Vulnerability

Solution:
The vendor has released fixes to address this issue. Please see the referenced advisory for information on obtaining and applying fixes.


Apple Mac OS X 10.4.11

Apple Mac OS X Server 10.4.11

Apple Mac OS X 10.5.2

References

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