CoSign POST Request Carriage Return Insertion Vulnerabilities - Secunia Advisories - Vulnerability Intelligence

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CoSign POST Request Carriage Return Insertion Vulnerabilities
Secunia Advisory:	SA24845	Advisory Toolbox: Issue ticket Save in to-do list Mark as handled Exploit information Download as PDF Review actions Add comment
Release Date:	2007-04-12
Last Update:	2007-04-27
Popularity:	3,707 views

Critical:	Moderately critical
Impact:	Hijacking Security Bypass
Where:	From remote
Solution Status:	Vendor Patch

Software:	CoSign 1.x CoSign 2.x

Subscribe:	Instant alerts on relevant vulnerabilities

CVE reference:	CVE-2007-2232 CVE-2007-2233

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. http://www.umich.edu/~umweb/downloads/cosign-1.9.4-vuln-patch.txt http://www.umich.edu/~umweb/downloads/cosign-1.9.4b.tar.gz http://www.umich.edu/~umweb/downloads/cosign-2.0.2a.tar.gz Provided and/or discovered by: Jon Oberheide, University of Michigan Changelog: 2007-04-27: Added CVE reference. 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

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