What is the severity of CVE-2021-42097?

The severity of CVE-2021-42097 is high.

How can an attacker exploit CVE-2021-42097?

An attacker can exploit CVE-2021-42097 by using cross-site request forgery (CSRF) to gain access to another account.

Which versions of Mailman are affected by CVE-2021-42097?

Mailman versions 1:2.1.26-1ubuntu0.4 and 1:2.1.20-1ubuntu0.6+esm1 are affected by CVE-2021-42097.

How do I fix CVE-2021-42097?

To fix CVE-2021-42097, update Mailman to version 1:2.1.26-1ubuntu0.4 or version 1:2.1.20-1ubuntu0.6+esm1 depending on your Ubuntu version.

Where can I find more information about CVE-2021-42097?

More information about CVE-2021-42097 can be found at the following links: [CVE-2021-42097](https://ubuntu.com/security/CVE-2021-42097) and [USN-5121-2](https://ubuntu.com/security/notices/USN-5121-2).

Vulnerability/
USN-5121-1

CWE

352

22/10/2021

USN-5121-1: Mailman vulnerabilities

First published: Fri Oct 22 2021(Updated: )

Andre Protas, Richard Cloke, and Andy Nuttall discovered that Mailman did not properly associate cross-site request forgery (CSRF) tokens to specific accounts. A remote attacker could use this to perform a CSRF attack to gain access to another account. (CVE-2021-42097) Andre Protas, Richard Cloke, and Andy Nuttall discovered that Mailman's cross-site request forgery (CSRF) tokens for the options page are derived from the admin password. A remote attacker could possibly use this to assist in performing a brute force attack against the admin password. (CVE-2021-42096)

Affected Software	Affected Version	How to fix
All of
ubuntu/mailman	<1:2.1.26-1ubuntu0.4	1:2.1.26-1ubuntu0.4
	=18.04
All of
ubuntu/mailman	<1:2.1.20-1ubuntu0.6+esm1	1:2.1.20-1ubuntu0.6+esm1
	=16.04

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Reference Links

Child vulnerabilities

(Contains the following vulnerabilities)

Frequently Asked Questions

What is the severity of CVE-2021-42097?
The severity of CVE-2021-42097 is high.
How can an attacker exploit CVE-2021-42097?
An attacker can exploit CVE-2021-42097 by using cross-site request forgery (CSRF) to gain access to another account.
Which versions of Mailman are affected by CVE-2021-42097?
Mailman versions 1:2.1.26-1ubuntu0.4 and 1:2.1.20-1ubuntu0.6+esm1 are affected by CVE-2021-42097.
How do I fix CVE-2021-42097?
To fix CVE-2021-42097, update Mailman to version 1:2.1.26-1ubuntu0.4 or version 1:2.1.20-1ubuntu0.6+esm1 depending on your Ubuntu version.
Where can I find more information about CVE-2021-42097?
More information about CVE-2021-42097 can be found at the following links: [CVE-2021-42097](https://ubuntu.com/security/CVE-2021-42097) and [USN-5121-2](https://ubuntu.com/security/notices/USN-5121-2).

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source/Ubuntu
anchor-related/USN-5121-2
agent/software-canonical-lookup
package-manager/ubuntu
vendor/ubuntu
canonical/ubuntu ubuntu
version/ubuntu ubuntu/18.04
version/ubuntu ubuntu/16.04

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