CVE-2021-46700 Use after free in n/a
A double free vulnerability in the libsixel library allows attackers to cause denial of service or potentially execute arbitrary code via crafted Sixel images.
- 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
- None listed
What is CVE-2021-46700?
CVE-2021-46700 is a medium-severity use after free vulnerability in n/a, published on 19 Feb 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 1.8.6, sixel_encoder_output_without_macro (called from sixel_encoder_encode_frame in encoder.c) has a double free.
Weakness: CWE-415
Which versions are affected by CVE-2021-46700?
It affects 1 product.
Products include Saitoha Libsixel.
How do I fix CVE-2021-46700?
No fix has been published for CVE-2021-46700 yet. Limit exposure of the affected software until one is available.
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-2021-46700 being exploited?
There is no known exploitation of CVE-2021-46700 in the wild and no public exploit code.
Other vulnerabilities in n/a
Sources
Also known as DEBIAN-CVE-2021-46700, GHSA-5mpg-37cw-j7g5, UBUNTU-CVE-2021-46700.