CVE-2020-27845 Denial of service in openjpeg
An out-of-bounds read in OpenJPEG allows attackers to cause application crashes via malicious input, impacting availability.
- 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-2020-27845?
CVE-2020-27845 is a medium-severity denial of service 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
There's a flaw in src/lib/openjp2/pi.c of openjpeg in versions prior to 2.4.0. If an attacker is able to provide untrusted input to openjpeg's conversion/encoding functionality, they could cause an out-of-bounds read. The highest impact of this flaw is to application availability.
Weakness: CWE-125
Which versions are affected by CVE-2020-27845?
It affects 4 products.
Products include Debian Debian Linux, Fedoraproject Fedora, Oracle Outside in Technology, Uclouvain Openjpeg.
How do I fix CVE-2020-27845?
Upgrade to a fixed version.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2020-27845 being exploited?
There is no known exploitation of CVE-2020-27845 in the wild and no public exploit code.
Other vulnerabilities in Debian Debian Linux
Sources
Also known as AZL-44712, DEBIAN-CVE-2020-27845, GHSA-4jrm-wf8f-qvqh, JLSEC-2026-542, UBUNTU-CVE-2020-27845.