CVE-2021-21417 Use after free in fluidsynth
Attackers can trigger a use-after-free vulnerability in FluidSynth by providing a malicious SoundFont file, potentially leading to code execution or crashes.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2021-21417?
CVE-2021-21417 is a high-severity use after free vulnerability in Debian Debian Linux, published on 29 Apr 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
fluidsynth is a software synthesizer based on the SoundFont 2 specifications. A use after free violation was discovered in fluidsynth, that can be triggered when loading an invalid SoundFont file.
Weakness: CWE-416
Which versions are affected by CVE-2021-21417?
It affects 2 products.
Products include Debian Debian Linux, Fluidsynth Fluidsynth.
How do I fix CVE-2021-21417?
Apply the vendor's patch.
Upgrade to the fixed version. These bugs are found with fuzzing and sanitisers and avoided by memory-safe languages. More about Use after free.
Is CVE-2021-21417 being exploited?
There is no known exploitation of CVE-2021-21417 in the wild and no public exploit code.
Other vulnerabilities in Debian Debian Linux
Sources
Also known as CVE-2021-28421, DEBIAN-CVE-2021-21417, DLA-2697-1, GHSA-6fcq-pxhc-jxc9, MGASA-2021-0324, UBUNTU-CVE-2021-21417.