#VU28635 Spoofing attack in Mailman - CVE-2020-12108

Vulnerability identifier: #VU28635

Vulnerability risk: Medium

CVSSv4.0: 5.5 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:P/U:Green]

CVE-ID: CVE-2020-12108

CWE-ID: CWE-451

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Mailman
Web applications / Webmail solutions

Vendor: GNU

Description

The vulnerability allows a remote attacker to perform spoofing attack.

The vulnerability exists due to incorrect processing of user-supplied data when processing email addresses. A remote attacker can create a specially crafted email and spoof content of email message.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Mailman: 2.1.1 - 2.1.30

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External links
https://lists.opensuse.org/opensuse-security-announce/2020-05/msg00036.html
https://lists.opensuse.org/opensuse-security-announce/2020-06/msg00003.html
https://bugs.launchpad.net/mailman/+bug/1873722
https://code.launchpad.net/mailman
https://lists.debian.org/debian-lts-announce/2020/05/msg00007.html
https://mail.python.org/pipermail/mailman-announce/
https://usn.ubuntu.com/4354-1/

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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. However, proof of concept for this vulnerability is available.