Path traversal in Adobe RoboHelp Server

1) Path traversal

EUVDB-ID: #VU53926

Risk: High

CVSSv3.1: 8.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-28588

CWE-ID: CWE-22 - Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

Exploit availability: No

Description

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

The vulnerability exists due to input validation error when processing directory traversal sequences. A remote attacker can send a specially crafted HTTP request and read arbitrary files on the system.

Successful exploitation of the vulnerability may lead to system compromise.

Mitigation

Install update from vendor's website.

Vulnerable software versions

RoboHelp: 2019.0.1 - 2019.0.14

External links

http://helpx.adobe.com/security/products/robohelp-server/apsb21-44.html
http://www.zerodayinitiative.com/advisories/ZDI-21-660/

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.