#VU28981 Path traversal in Roundcube - CVE-2020-12640

Vulnerability identifier: #VU28981

Vulnerability risk: Medium

CVSSv4.0: 4.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2020-12640

CWE-ID: CWE-22

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Roundcube
Web applications / Webmail solutions

Vendor: Roundcube

Description

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

The vulnerability exists due to input validation error when processing directory traversal sequences passed via the plugin name to rcube_plugin_api.php. A remote user can send a specially crafted HTTP request and read arbitrary files on the system.

Mitigation
Install update from vendor's website.

Vulnerable software versions

Roundcube: 1.2.0 - 1.2.9, 1.3.0 - 1.3.10, 1.4.0 - 1.4.3

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External links
https://github.com/roundcube/roundcubemail/commit/814eadb699e8576ce3a78f21e95bf69a7c7b3794
https://github.com/roundcube/roundcubemail/compare/1.4.3...1.4.4
https://github.com/roundcube/roundcubemail/releases/tag/1.4.4
https://roundcube.net/news/2020/04/29/security-updates-1.4.4-1.3.11-and-1.2.10

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.

Is there known malware, which exploits this vulnerability?

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