Vulnerability identifier: #VU58348

Vulnerability risk: Medium

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

CVE-ID: CVE-2021-42096

CWE-ID: CWE-338

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Mailman
Web applications / Webmail solutions

Vendor: GNU

Description

The vulnerability allows a remote attacker to brute-force the administrative password.

The vulnerability exists due to a certain csrf_token value is derived from the admin password. A remote attacker can conduct a brute-force attack against that password and gain unauthorized access to the application.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Mailman: 2.0 - 2.1b1

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External links
http://mail.python.org/archives/list/mailman-announce@python.org/thread/IKCO6JU755AP5G5TKMBJL6IEZQTTNPDQ/
http://bugs.launchpad.net/mailman/+bug/1947639
http://www.openwall.com/lists/oss-security/2021/10/21/4

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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.