3CX Phone System 15.5.3554.1 Management Console DownloadRecord?file= path traversal

Summaryinfo

A vulnerability was found in 3CX Phone System 15.5.3554.1 and classified as problematic. This affects an unknown part of the file /api/RecordingList/DownloadRecord?file= of the component Management Console. The manipulation results in path traversal. This vulnerability is known as CVE-2017-15359. It is possible to launch the attack remotely. Furthermore, an exploit is available. Applying restrictive firewalling is recommended.

Detailsinfo

A vulnerability classified as problematic has been found in 3CX Phone System 15.5.3554.1. Affected is an unknown code of the file /api/RecordingList/DownloadRecord?file= of the component Management Console. The manipulation with an unknown input leads to a path traversal vulnerability. CWE is classifying the issue as 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. This is going to have an impact on confidentiality. CVE summarizes:

In the 3CX Phone System 15.5.3554.1, the Management Console typically listens to port 5001 and is prone to a directory traversal attack: "/api/RecordingList/DownloadRecord?file=" and "/api/SupportInfo?file=" are the vulnerable parameters. An attacker must be authenticated to exploit this issue to access sensitive information to aid in subsequent attacks.

The bug was discovered 10/16/2017. The weakness was published 10/18/2017 as not defined mailinglist post (Full-Disclosure). The advisory is shared for download at seclists.org. This vulnerability is traded as CVE-2017-15359 since 10/15/2017. It is possible to launch the attack remotely. A authentication is needed for exploitation. Technical details and a public exploit are known. The MITRE ATT&CK project declares the attack technique as T1006.

The exploit is shared for download 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 2 days. During that time the estimated underground price was around $0-$5k.

It is possible to mitigate the weakness by firewalling 5001.

The vulnerability is also documented in the vulnerability database at Exploit-DB (42991). VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

Vendor

• 3CX

Name

• Phone System

Version

• 15.5.3554.1

CPE 2.3info

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CPE 2.2info

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

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