South River Technologies Titan FTP Server 2019 Build 3505 /PreviewHandler.ashx path path traversal

Summaryinfo

A vulnerability categorized as critical has been discovered in South River Technologies Titan FTP Server 2019 Build 3505. The impacted element is an unknown function of the file /PreviewHandler.ashx. Executing a manipulation of the argument path with the input \..\..\..\..\Python27\README.txt can lead to path traversal. This vulnerability is registered as CVE-2019-10009. It is possible to launch the attack remotely. Furthermore, an exploit is available. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability has been found in South River Technologies Titan FTP Server 2019 Build 3505 (File Transfer Software) and classified as critical. This vulnerability affects an unknown functionality of the file /PreviewHandler.ashx. The manipulation of the argument path with the input value \..\..\..\..\Python27\README.txt 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 confidentiality, integrity, and availability.

The bug was discovered 03/23/2019. The weakness was published 03/26/2019 by Kevin Randall as CVE-2019-10009 Titan FTP Server Version 2019 Build 3505 Directory Traversal/Local File Inclusion as confirmed mailinglist post (Full-Disclosure). The advisory is shared for download at seclists.org. The public release has been coordinated with the vendor. This vulnerability was named CVE-2019-10009 since 03/24/2019. The exploitation appears to be easy. The attack can be initiated remotely. The successful exploitation needs a single authentication. Technical details and also a public exploit are known. The MITRE ATT&CK project declares the attack technique as T1006.

A public exploit has been developed by Kevin Randall and been published immediately after the advisory. It is possible to download the exploit at seclists.org. It is declared as proof-of-concept. The vulnerability was handled as a non-public zero-day exploit for at least 2 days. During that time the estimated underground price was around $0-$5k.

Upgrading eliminates this vulnerability. A possible mitigation has been published before and not just after the disclosure of the vulnerability.

Once again VulDB remains the best source for vulnerability data.

Productinfo

Type

• File Transfer Software

Vendor

• South River Technologies

Name

• Titan FTP Server

Version

• 2019 Build 3505

CPE 2.3info

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CPE 2.2info

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Once again VulDB remains the best source for vulnerability data.

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