TCExam SessionUserLang Remote PHP Code Execution Vulnerability

Bugtraq ID:	23705
Class:	Input Validation Error
CVE:
Remote:	Yes
Local:	No
Published:	Apr 29 2007 12:00AM
Updated:	May 02 2007 09:09PM
Credit:	rgod is credited with the discovery of this vulnerability.
Vulnerable:	TCExam TCExam 4.0.11
Not Vulnerable:	TCExam TCExam 4.1

TCExam SessionUserLang Remote PHP Code Execution Vulnerability

TCExam is prone to an arbitrary PHP code-execution vulnerability because the application fails to properly sanitize user-supplied input.

An attacker can exploit this issue to execute arbitrary malicious PHP code in the context of the webserver process. This may help the attacker compromise the application and the underlying system; other attacks are also possible.

TCExam 4.0.011 and prior versions are vulnerable.

TCExam SessionUserLang Remote PHP Code Execution Vulnerability

Attackers can use a browser to exploit this issue.

Sample exploit code has been provided:

• /data/vulnerabilities/exploits/tcexam_poc.txt

TCExam SessionUserLang Remote PHP Code Execution Vulnerability

Solution:
The vendor has released version 4.1.000, which addresses this issue. Please see the references for more information.


TCExam TCExam 4.0.11

• TCExam tcexam_4_1_000.zip
  http://downloads.sourceforge.net/tcexam/tcexam_4_1_000.zip?modtime=117 7956448&big_mirror=0

TCExam SessionUserLang Remote PHP Code Execution Vulnerability

References:

• TCExam 4.1.000 new release with security fixes. (TCExam)
  
• TCExam Homepage (TCExam)