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>> OpenSSH Untrusted Cookie Creation Handling Security Bypass Weakness

Title : OpenSSH Untrusted Cookie Creation Handling Security Bypass Weakness
VUPEN ID : VUPEN/ADV-2007-3156
CVE ID : CVE-2007-4752
Rated as : Low Risk 
Remotely Exploitable : Yes
Locally Exploitable : Yes
Release Date : 2007-09-17


Technical Description    Receive VUPEN Security alerts in a Text format  Receive VUPEN Security alerts in a PDF format  Receive VUPEN Security alerts in an XML format  Receive VUPEN Security notifications by SMS 

A weakness has been identified in OpenSSH, which could be exploited by attackers to bypass security restrictions. This issue is caused by an error in ssh that uses a trusted X11 cookie when an untrusted cookie cannot be created, which could be exploited by attackers to bypass security policies and gain privileges by causing an X client to be treated as trusted.

Affected Products

OpenSSH version 4.6 and prior
OpenSSH version 4.6p1 and prior

Solution

Upgrade to OpenSSH version 4.7 or 4.7p1 :
http://www.openssh.com/

References

http://www.vupen.com/english/advisories/2007/3156
http://www.openssh.com/txt/release-4.7

Credits

Vulnerability reported by the vendor.

ChangeLog

2007-09-17 : Initial release

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