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Ubuntu Security Notice USN-6580-1
January 15, 2024

w3m vulnerability

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

• Ubuntu 23.10
• Ubuntu 23.04
• Ubuntu 22.04 LTS
• Ubuntu 20.04 LTS
• Ubuntu 18.04 LTS (Available with Ubuntu Pro)
• Ubuntu 14.04 LTS (Available with Ubuntu Pro)

Summary:

w3m could be made to crash or run programs as your login if it opened a malicious website.

Software Description:

• w3m: WWW browsable pager with excellent tables/frames support

Details:

It was discovered that w3m incorrectly handled certain HTML files.
An attacker could possibly use this issue to cause a crash or
execute arbitrary code.

Update instructions:

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

Ubuntu 23.10:
w3m 0.5.3+git20230121-2ubuntu0.23.10.1

Ubuntu 23.04:
w3m 0.5.3+git20230121-2ubuntu0.23.04.1

Ubuntu 22.04 LTS:
w3m 0.5.3+git20210102-6ubuntu0.2

Ubuntu 20.04 LTS:
w3m 0.5.3-37ubuntu0.2

Ubuntu 18.04 LTS (Available with Ubuntu Pro):
w3m 0.5.3-36ubuntu0.1+esm1

Ubuntu 14.04 LTS (Available with Ubuntu Pro):
w3m 0.5.3-15ubuntu0.2+esm2

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

References:
https://ubuntu.com/security/notices/USN-6580-1
CVE-2023-4255

Package Information:
https://launchpad.net/ubuntu/+source/w3m/0.5.3+git20230121-2ubuntu0.23.10.1
https://launchpad.net/ubuntu/+source/w3m/0.5.3+git20230121-2ubuntu0.23.04.1
https://launchpad.net/ubuntu/+source/w3m/0.5.3+git20210102-6ubuntu0.2
https://launchpad.net/ubuntu/+source/w3m/0.5.3-37ubuntu0.2