Secunia Security Advisory - Morgan ARMAND has discovered a vulnerability in DotClear, which can be exploited by malicious users to compromise a vulnerable system.
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TITLE:
DotClear "ecrire/images.php" File Upload Vulnerability
SECUNIA ADVISORY ID:
SA29819
VERIFY ADVISORY:
http://secunia.com/advisories/29819/
CRITICAL:
Less critical
IMPACT:
System access
WHERE:
>From remote
SOFTWARE:
DotClear 1.x
http://secunia.com/product/6261/
DESCRIPTION:
Morgan ARMAND has discovered a vulnerability in DotClear, which can
be exploited by malicious users to compromise a vulnerable system.
The ecrire/images.php script fails to validate the extension of an
uploaded file. This can be exploited to upload files with the ".php"
extension and execute arbitrary PHP code on the server, by creating a
file that is both a syntactically correct PHP script and an image that
the PHP function getimagesize() considers correct.
Successful exploitation requires valid advanced editor or
administrator credentials, and having set write permissions on the
"images/" directory.
The vulnerability is confirmed in version 1.2.7.1. Other versions may
also be affected.
SOLUTION:
Only grant advanced editor or administrator access to trusted users.
Remove write permissions from the "images/" directory.
PROVIDED AND/OR DISCOVERED BY:
Morgan ARMAND
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