CVE-2020-21548 Memory corruption in n/a
A heap-based buffer overflow in Libsixel allows attackers to execute arbitrary code or cause denial of service 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
- Available
What is CVE-2020-21548?
CVE-2020-21548 is a high-severity memory corruption vulnerability in n/a, published on 17 Sep 2021. 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
Libsixel 1.8.3 contains a heap-based buffer overflow in the sixel_encode_highcolor function in tosixel.c.
Weakness: CWE-787
Which versions are affected by CVE-2020-21548?
It affects 1 product.
Products include Saitoha Libsixel.
How do I fix CVE-2020-21548?
Upgrade to a fixed version.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2020-21548 being exploited?
There is no known exploitation of CVE-2020-21548 in the wild and no public exploit code.
Other vulnerabilities in n/a
Sources
Also known as DEBIAN-CVE-2020-21548, GHSA-rqxx-8p8c-6h26, UBUNTU-CVE-2020-21548.