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OpenSSH Privilege Separation Monitor Key Signature Authentication Bypass


Title : OpenSSH Privilege Separation Monitor Key Signature Authentication Bypass
Advisory ID : FrSIRT/ADV-2006-4399
CVE ID : CVE-2006-5794
Rated as : Low Risk 
Remotely Exploitable : Yes
Locally Exploitable : Yes
Release Date : 2006-11-08

Advisory Details

 
  Description
  Affected Products
  Solution
  References
Technical Description    Receive FrSIRT alerts in a Text format  Receive FrSIRT alerts in a PDF format  Receive FrSIRT alerts in an XML format  Receive FrSIRT notifications by SMS 

A vulnerability has been identified in OpenSSH, which could be exploited by attackers to bypass security restrictions. This flaw is due to an error in the privilege separation monitor function "monitor_child_preauth()" [monitor.c] that fails to properly validate certain signatures, which could be exploited in combination with other vulnerabilities to weaken the authentication process.

Credits

Vulnerability reported by the vendor

ChangeLog

2006-11-08 : Initial release

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