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Insecure Library Loading
Moderately critical

CoSign POST Request Carriage Return Insertion Vulnerabilities

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Release Date:  2007-04-12    Last Update:  2007-04-27    Views:  7,652

Secunia Advisory SA24845

Where:

From remote

Impact:

Hijacking, Security Bypass

Solution Status:

Vendor Patch

CVE Reference(s):

Description


Jon Oberheide has reported two vulnerabilities in CoSign, which can be exploited by malicious users to hijack other user sessions and by malicious people to bypass certain security restrictions.

Certain input passed via POST requests are not properly sanitised before being used by the daemon. These can be exploited to insert certain commands via carriage return sequences in the cookie or data of a POST request.

Successful exploitation e.g. allows a non-authenticated user to bypass the authentication mechanism and an authenticated user to assume the identity of other users.

The vulnerabilities are reported in versions 2.0.1 and 2.0.2. Other versions may also be affected.


Solution:
Apply patch or update to version 2.0.2a or 1.9.4b.

Further details available to Secunia VIM customers

Provided and/or discovered by:
Jon Oberheide, University of Michigan

Original Advisory:
http://www.umich.edu/~umweb/software/cosign/cosign-vuln-2007-001.txt
http://www.umich.edu/~umweb/software/cosign/cosign-vuln-2007-002.txt

Deep Links:
Links available to Secunia VIM customers

Do you have additional information related to this advisory?

Please provide information about patches, mitigating factors, new versions, exploits, faulty patches, links, and other relevant data by posting comments to this Advisory. You can also send this information to vuln@secunia.com

Subject: CoSign POST Request Carriage Return Insertion Vulnerabilities

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