CVE-2020-27843 Memory corruption in openjpeg
An attacker can cause a denial of service via out-of-bounds read in OpenJPEG by providing specially crafted input to conversion or encoding functions.
- 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-2020-27843?
CVE-2020-27843 is a medium-severity memory corruption vulnerability in Debian Debian Linux, published on 5 Jan 2021. 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 flaw was found in OpenJPEG in versions prior to 2.4.0. This flaw allows an attacker to provide specially crafted input to the conversion or encoding functionality, causing an out-of-bounds read. The highest threat from this vulnerability is system availability.
Weakness: CWE-125
Which versions are affected by CVE-2020-27843?
It affects 4 products.
Products include Debian Debian Linux, Fedoraproject Fedora, Oracle Outside in Technology, Uclouvain Openjpeg.
How do I fix CVE-2020-27843?
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-2020-27843 being exploited?
There is no known exploitation of CVE-2020-27843 in the wild and no public exploit code.
Other vulnerabilities in Debian Debian Linux
Sources
Also known as AZL-45333, DEBIAN-CVE-2020-27843, GHSA-w7f7-f46g-r954, JLSEC-2026-540, UBUNTU-CVE-2020-27843.