CVE-2021-45340 Null dereference in n/a

Medium 6.5 Published 25 Jan 2022 Updated 4 Aug 2024

Attackers can cause a denial of service via a crafted PICT file due to a NULL pointer dereference in the libsixel library.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Over the internet
Victim action needed: A user has to click or open something
Fix: Available

What is CVE-2021-45340?

CVE-2021-45340 is a medium-severity vulnerability in n/a, published on 25 Jan 2022. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

Official description

In Libsixel prior to and including v1.10.3, a NULL pointer dereference in the stb_image.h component of libsixel allows attackers to cause a denial of service (DOS) via a crafted PICT file.

Weakness: CWE-476

Which versions are affected by CVE-2021-45340?

It affects 1 product.

Products include Libsixel Libsixel.

How do I fix CVE-2021-45340?

Upgrade to a fixed version.

Is CVE-2021-45340 being exploited?

There is no known exploitation of CVE-2021-45340 in the wild and no public exploit code.

Sources

Also known as DEBIAN-CVE-2021-45340, GHSA-7xr9-9g9p-xmfp, UBUNTU-CVE-2021-45340.