CVE-2021-38443 Eclipse CycloneDDS Improper Handling of Syntactically Invalid Structure

Medium 6.6 Published 5 May 2022 Updated 16 Apr 2025

Attackers can write arbitrary values in the XML parser due to improper handling of invalid structures, potentially leading to code execution.

Exploited in the wild: Not known
Login needed: Any signed-in user
Attackable: Local or same network only
Victim action needed: Not needed
Fix: Available

What is CVE-2021-38443?

CVE-2021-38443 is a medium-severity vulnerability in Eclipse CycloneDDS, published on 5 May 2022. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

Eclipse CycloneDDS versions prior to 0.8.0 improperly handle invalid structures, which may allow an attacker to write arbitrary values in the XML parser.

Weakness: CWE-228

Which versions are affected by CVE-2021-38443?

It affects 1 product.

Products include Eclipse Cyclonedds.

How do I fix CVE-2021-38443?

Upgrade to a fixed version.

Is CVE-2021-38443 being exploited?

There is no known exploitation of CVE-2021-38443 in the wild and no public exploit code.

CVE-2021-38441 Eclipse CycloneDDS Write-what-where Condition Medium 6.6

Sources

Also known as DEBIAN-CVE-2021-38443, GHSA-fq6w-j34v-phjr, UBUNTU-CVE-2021-38443.