CVE-2021-23191 Null dereference in htmldoc

High 7.8 Published 2 Mar 2022 Updated 3 Aug 2024

A NULL pointer dereference in htmldoc allows attackers to cause a denial of service via crafted JPEG images.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Local or same network only
Victim action needed: A user has to click or open something
Fix: Available

What is CVE-2021-23191?

CVE-2021-23191 is a high-severity vulnerability in htmldoc, published on 2 Mar 2022. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.

Official description

A security issue was found in htmldoc v1.9.12 and before. A NULL pointer dereference in the function image_load_jpeg() in image.cxx may result in denial of service.

Weakness: CWE-476

Which versions are affected by CVE-2021-23191?

It affects 1 product.

Products include Htmldoc Project Htmldoc.

How do I fix CVE-2021-23191?

Upgrade to a fixed version.

Is CVE-2021-23191 being exploited?

There is no known exploitation of CVE-2021-23191 in the wild and no public exploit code.

Sources

Also known as DEBIAN-CVE-2021-23191, GHSA-rh6g-g88g-qmfg, UBUNTU-CVE-2021-23191.