Remote code execution in Mumble

1) Input validation error

EUVDB-ID: #VU50817

Risk: Medium

CVSSv3.1: 6.5 [CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-27229

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

The vulnerability allows a remote attacker to compromise the affected system.

The vulnerability exists due to insufficient validation of user-supplied input when processing URL schemes. A remote attacker can create a specially crafted web page, trick the victim to open the web page, click on the "Open Webpage text" and execute arbitrary code on the system.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

mumble: 1.3.0 - 1.3.3

External links

http://github.com/mumble-voip/mumble/commit/e59ee87abe249f345908c7d568f6879d16bfd648
http://github.com/mumble-voip/mumble/compare/1.3.3...1.3.4
http://github.com/mumble-voip/mumble/pull/4733
http://lists.debian.org/debian-lts-announce/2021/02/msg00022.html

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.