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Ubuntu Security Notice USN-5121-2

Ubuntu Security Notice USN-5121-2
Posted Nov 2, 2021
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 5121-2 - USN-5009-1 fixed vulnerabilities in Mailman. This update provides the corresponding updates for Ubuntu 20.04 LTS. It was discovered that Mailman allows arbitrary content injection. An attacker could use this to inject malicious content. It was discovered that Mailman improperly sanitize the MIME content. An attacker could obtain sensitive information by sending a special type of attachment.

tags | advisory, arbitrary, vulnerability
systems | linux, ubuntu
advisories | CVE-2020-12108, CVE-2020-12137, CVE-2021-42096, CVE-2021-42097
SHA-256 | 3e1981a243b75d6cb9eb3b871c11554d027734dba3c108e22426fdec3c295c82

Ubuntu Security Notice USN-5121-2

Change Mirror Download
==========================================================================
Ubuntu Security Notice USN-5121-2
November 01, 2021

mailman vulnerabilities
==========================================================================

A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 20.04 LTS

Summary:

Several security issues were fixed in Mailman.

Software Description:
- mailman: Web-based mailing list manager

Details:

USN-5009-1 fixed vulnerabilities in Mailman. This update provides the
corresponding updates for Ubuntu 20.04 LTS. In addition, the following CVEs
were fixed:

It was discovered that Mailman allows arbitrary content injection. An attacker
could use this to inject malicious content. (CVE-2020-12108, CVE-2020-15011)

It was discovered that Mailman improperly sanitize the MIME content. An
attacker could obtain sensitive information by sending a special type of
attachment. (CVE-2020-12137)

Original advisory details:

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)

Update instructions:

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 20.04 LTS:
mailman 1:2.1.29-1ubuntu3.1

In general, a standard system update will make all the necessary changes.

References:
https://ubuntu.com/security/notices/USN-5121-2
https://ubuntu.com/security/notices/USN-5121-1
CVE-2020-12108, CVE-2020-12137, CVE-2020-15011, CVE-2021-42096,
CVE-2021-42097

Package Information:
https://launchpad.net/ubuntu/+source/mailman/1:2.1.29-1ubuntu3.1
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