CVE-2020-27823 Memory corruption in openjpeg
An attacker can exploit a buffer overflow in OpenJPEG's encoder via crafted offsets, potentially leading to code execution or denial of service.
- 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-2020-27823?
CVE-2020-27823 is a high-severity memory corruption vulnerability in Debian Debian Linux, published on 13 May 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’s encoder. This flaw allows an attacker to pass specially crafted x,y offset input to OpenJPEG to use during encoding. The highest threat from this vulnerability is to confidentiality, integrity, as well as system availability.
Which versions are affected by CVE-2020-27823?
It affects 3 products.
Products include Debian Debian Linux, Fedoraproject Fedora, Uclouvain Openjpeg.
How do I fix CVE-2020-27823?
Apply the vendor's patch.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2020-27823 being exploited?
There is no known exploitation of CVE-2020-27823 in the wild and no public exploit code.
Other vulnerabilities in Debian Debian Linux
Sources
Also known as ALPINE-CVE-2020-27823, AZL-44814, DEBIAN-CVE-2020-27823, GHSA-27x9-7vgq-h9f7, JLSEC-2026-536, UBUNTU-CVE-2020-27823.