Cross-site request forgery in Mailman - CVE-2021-42097

Vulnerability identifier: #VU58347

CSH Severity: Medium

CVSS v4: 5.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N]

CVE-ID: CVE-2021-42097

CWE-ID: CWE-352

Exploitation vector: Remote access

Exploit availability: No public exploit available

The vulnerability allows a remote attacker to perform cross-site request forgery attacks.

The vulnerability exists due to insufficient validation of the HTTP request origin. A remote attacker can trick the victim to visit a specially crafted web page and take over the admin account, as the csrf_token value is not specific to a single user account.

Mailman
Debian Linux
Red Hat Enterprise Linux for Power, little endian
Red Hat Enterprise Linux for Power, big endian
Red Hat Enterprise Linux for IBM z Systems
Red Hat Enterprise Linux Workstation
Red Hat Enterprise Linux Server
CentOS
Anolis OS
Red Hat Enterprise Linux for x86_64
Red Hat Enterprise Linux for ARM 64
Red Hat Enterprise Linux for Power, little endian - Extended Update Support
Red Hat Enterprise Linux for x86_64 - Extended Update Support
Red Hat Enterprise Linux for IBM z Systems - Extended Update Support
Red Hat Enterprise Linux for ARM 64 - Extended Update Support
Red Hat Enterprise Linux Server - TUS
Red Hat Enterprise Linux Server - AUS
Ubuntu
openEuler
Red Hat Enterprise Linux Server for x86_64 - Update Services for SAP Solutions
Red Hat Enterprise Linux Server for Power LE - Update Services for SAP Solutions
mailman (Red Hat package)
mailman (Ubuntu package)
mailman (Debian package)
mailman
mailman-debugsource
mailman-debuginfo

Install update from vendor's website.

Mailman - update to 2.1.35
mailman (Red Hat package) - update to 2.1.15-30.el7_9.2
mailman (Ubuntu package) - addressed in versions 1:2.1.26-1ubuntu0.4, 1:2.1.26-1ubuntu0.6, 1:2.1.29-1ubuntu3.1
mailman (Debian package) - update to 1:2.1.29-1+deb10u2
mailman - addressed in versions 2.1.29-4, 2.1.29-12
mailman - update to 2.1.29-8
mailman-debugsource - update to 2.1.29-8
mailman-debuginfo - update to 2.1.29-8

• https://mail.python.org/archives/list/mailman-announce@python.org/thread/IKCO6JU755AP5G5TKMBJL6IEZQTTNPDQ/
• https://bugs.launchpad.net/mailman/+bug/1947640
• http://www.openwall.com/lists/oss-security/2021/10/21/4

• Multiple vulnerabilities in GNU Mailman
• Red Hat Enterprise Linux 8 update for the mailman:2.1 module
• Red Hat Enterprise Linux 8.2 update for the mailman:2.1 module
• Red Hat Enterprise Linux 8.1 update for the mailman:2.1 module
• Red Hat Enterprise Linux 8.4 update for the mailman:2.1 module
• CentOS 7 update for mailman
• Red Hat Enterprise Linux 7 update for mailman
• Ubuntu update for mailman
• Ubuntu update for mailman
• Debian update for mailman
• openEuler update for mailman
• Anolis OS update for mailman:2.1 (Anolis OS 8.2) module
• Anolis OS update for mailman:2.1 (Anolis OS 8.5) module