Use of Cryptographically Weak Pseudo-Random Number Generator (PRNG) in Mailman - CVE-2021-42096

Vulnerability identifier: #VU58348

CSH Severity: Medium

CVSS v4: 5.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N]

CVE-ID: CVE-2021-42096

CWE-ID: CWE-338

Exploitation vector: Remote access

Exploit availability: No public exploit available

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.

Mailman
Debian Linux
Red Hat Enterprise Linux for IBM z Systems
Anolis OS
SUSE OpenStack Cloud Crowbar
SUSE OpenStack Cloud
HPE Helion Openstack
Red Hat Enterprise Linux for x86_64
Red Hat Enterprise Linux for Power, little endian
Red Hat Enterprise Linux for ARM 64
Red Hat Enterprise Linux for x86_64 - Extended Update Support
Red Hat Enterprise Linux for Power, little endian - 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
SUSE Linux Enterprise Server
SUSE Linux Enterprise Server for SAP
Ubuntu
openEuler
Red Hat Enterprise Linux Server for Power LE - Update Services for SAP Solutions
Red Hat Enterprise Linux Server for x86_64 - Update Services for SAP Solutions
mailman
mailman-debuginfo
mailman-debugsource
mailman (Ubuntu package)
mailman (Debian package)

Install updates from vendor's website.

Mailman - update to 2.1.35
mailman - update to 2.1.17-3.26.1
mailman-debuginfo - update to 2.1.17-3.26.1
mailman-debugsource - update to 2.1.17-3.26.1
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/1947639
• 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
• Ubuntu update for mailman
• Ubuntu update for mailman
• Debian update for mailman
• SUSE 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