Main Vulnerability Database Vulnerabilities #VU24194

Path traversal in Parallels Remote Application Server - CVE-2017-9447

Published: January 10, 2020

Vulnerability identifier: #VU24194

CSH Severity: Medium

CVSS v4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N]

CVE-ID: CVE-2017-9447

CWE-ID: CWE-22

Exploitation vector: Remote access

Exploit availability: Public exploit is available

Vulnerability details

The vulnerability allows a remote attacker to perform directory traversal attacks.

The vulnerability exists due to input validation error when processing directory traversal sequences (e.g. ".\") appended after the "RASHTML5Gateway" URL. A remote attacker can send a specially crafted HTTP request and read arbitrary files on the system.

PoC:

https://[host]/RASHTML5Gateway//..\..\..\..\..\windowswin.ini

Affected software

Parallels Remote Application Server

How to mitigate CVE-2017-9447

Install update from vendor's website.

Parallels Remote Application Server - update to 15.5.3.16284

Links to Public Exploits and PoC-codes

Exploit #1457 - Parallels Remote Application Server 15.5 - Path Traversal (March 18, 2020)

External References

https://blog.runesec.com/2018/02/22/parallels-ras-path-traversal/

Related Security Bulletins

Path traversal in Parallels Remote Application Server