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

Summaryinfo

A vulnerability labeled as critical has been found in Tecrail Responsive FileManager 9.13.4. Affected by this issue is the function delete_file of the file execute.php. Executing a manipulation of the argument paths[0] can lead to path traversal. This vulnerability is handled as CVE-2018-20790. The attack can be executed remotely. Additionally, an exploit exists.

Detailsinfo

A vulnerability classified as critical was found in Tecrail Responsive FileManager 9.13.4. This vulnerability affects the function delete_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. CVE summarizes:

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

The bug was discovered 12/12/2018. The weakness was released 02/25/2019 as EDB-ID 45987 as not defined exploit (Exploit-DB). The advisory is shared for download at exploit-db.com. This vulnerability was named CVE-2018-20790 since 02/25/2019. The exploitation appears to be easy. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. Technical details and also a public exploit are known. The MITRE ATT&CK project declares the attack technique as T1006.

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). Entries connected to this vulnerability are available at VDB-131175, VDB-131177, VDB-131178 and VDB-131179. VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

Vendor

• Tecrail

Name

• Responsive FileManager

Version

• 9.13.4

CPE 2.3info

• 🔍

CPE 2.2info

• 🔍

CVSSv4info

CVSSv3info

CVSSv2info

Exploitinginfo

Threat Intelligenceinfo

Countermeasuresinfo

Timelineinfo

Sourcesinfo

Entryinfo

VulDB is the best source for vulnerability data and more expert information about this specific topic.

Discussion