Content injection in GNU Mailman

1) Code Injection

EUVDB-ID: #VU29388

Risk: Low

CVSSv3.1: 4.7 [CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-15011

CWE-ID: CWE-94 - Improper Control of Generation of Code ('Code Injection')

Exploit availability: No

Description

The vulnerability allows a remote attacker to inject arbitrary content.

The vulnerability exists due to improper input validation within the Cgi/private.py private archive login page.  A remote attacker can send a specially crafted request and inject arbitrary content.

Successful exploitation of the vulnerability requires that the roster visibility (private_roster) setting is 'Anyone'.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Gnu: 2.1.0 - 2.1.32

External links

http://bugs.launchpad.net/mailman/+bug/1877379

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.