CVE-2021-40145 Use after free in n/a
A double free vulnerability in the GD Graphics Library allows attackers to cause denial of service or potentially execute arbitrary code via crafted GD2 images.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2021-40145?
CVE-2021-40145 is a high-severity use after free vulnerability in n/a, published on 26 Aug 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
gdImageGd2Ptr in gd_gd2.c in the GD Graphics Library (aka LibGD) through 2.3.2 has a double free. NOTE: the vendor's position is "The GD2 image format is a proprietary image format of libgd. It has to be regarded as being obsolete, and should only be used for development and testing purposes.
Weakness: CWE-415
Which versions are affected by CVE-2021-40145?
It affects 1 product.
Products include Libgd Libgd.
How do I fix CVE-2021-40145?
Apply the vendor's patch.
Upgrade to the fixed version. These bugs are found with fuzzing and sanitisers and avoided by memory-safe languages. More about Use after free.
Is CVE-2021-40145 being exploited?
There is no known exploitation of CVE-2021-40145 in the wild and no public exploit code.
Other vulnerabilities in n/a
Sources
Also known as ALPINE-CVE-2021-40145, AZL-6432, CLSA-2022-1644931813, CLSA-2022-1646915745, CLSA-2026-1776445382, CLSA-2026-1777541021 and 6 more.