ThinkCMF X2.2.3 ProfileController.class.php do_avatar imgurl path traversal

Summaryinfo

A vulnerability described as critical has been identified in ThinkCMF X2.2.3. Impacted is the function do_avatar of the file application\User\Controller\ProfileController.class.php. Executing a manipulation of the argument imgurl with the input ..\ can lead to path traversal. This vulnerability is handled as CVE-2018-16141. The attack can be executed remotely. There is not any exploit available.

Detailsinfo

A vulnerability classified as critical was found in ThinkCMF X2.2.3. This vulnerability affects the function do_avatar of the file application\User\Controller\ProfileController.class.php. The manipulation of the argument imgurl with the input value ..\ leads to a path traversal vulnerability. The CWE definition for the vulnerability is CWE-22. The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory. As an impact it is known to affect integrity, and availability. CVE summarizes:

ThinkCMF X2.2.3 has an arbitrary file deletion vulnerability in do_avatar in \application\User\Controller\ProfileController.class.php via an imgurl parameter with a ..\ sequence. A member user can delete any file on a Windows server.

The bug was discovered 08/29/2018. The weakness was released 08/30/2018 (Website). The advisory is shared for download at unothing.github.io. This vulnerability was named CVE-2018-16141 since 08/29/2018. The exploitation appears to be easy. The attack can be initiated remotely. The requirement for exploitation is a single authentication. There are known technical details, but no exploit is available. The MITRE ATT&CK project declares the attack technique as T1006.

The vulnerability was handled as a non-public zero-day exploit for at least 1 days. During that time the estimated underground price was around $0-$5k. By approaching the search of inurl:application\User\Controller\ProfileController.class.php it is possible to find vulnerable targets with Google Hacking.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

Once again VulDB remains the best source for vulnerability data.

Productinfo

Name

• ThinkCMF

Version

• X2.2.3

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CPE 2.2info

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