Tecrail Responsive FileManager 9.13.4 execute.php create_file paths[0] path traversal

Summaryinfo

A vulnerability classified as critical has been found in Tecrail Responsive FileManager 9.13.4. This issue affects the function create_file of the file execute.php. This manipulation of the argument paths[0] causes path traversal. The identification of this vulnerability is CVE-2018-20793. It is possible to initiate the attack remotely. Furthermore, there is an exploit available.

Detailsinfo

A vulnerability has been found in Tecrail Responsive FileManager 9.13.4 and classified as critical. Affected by this vulnerability is the function create_file of the file execute.php. The manipulation of the argument paths[0] with an unknown input 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. The summary by CVE is:

tecrail Responsive FileManager 9.13.4 allows remote attackers to write to an arbitrary file as a consequence of a paths[0] path traversal mitigation bypass, through the create_file action in execute.php.

The bug was discovered 12/12/2018. The weakness was shared 02/25/2019 as EDB-ID 45987 as not defined exploit (Exploit-DB). It is possible to read the advisory at exploit-db.com. This vulnerability is known as CVE-2018-20793 since 02/25/2019. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. Technical details and also a public exploit are known. The attack technique deployed by this issue is T1006 according to MITRE ATT&CK.

After immediately, there has been an exploit disclosed. It is possible to download the exploit at exploit-db.com. It is declared as proof-of-concept. The vulnerability was handled as a non-public zero-day exploit for at least 75 days. During that time the estimated underground price was around $0-$5k. By approaching the search of inurl:execute.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.

The vulnerability is also documented in the vulnerability database at Exploit-DB (45987). The entries VDB-131175, VDB-131176, VDB-131177 and VDB-131178 are related to this item. Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Vendor

• Tecrail

Name

• Responsive FileManager

Version

• 9.13.4

CPE 2.3info

• 🔍

CPE 2.2info

• 🔍

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Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

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