OSV-2021-418 Heap-double-free in mfree
A heap double-free vulnerability in systemd's systemctl allows local attackers to potentially execute arbitrary code or cause a denial of service.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is OSV-2021-418?
OSV-2021-418 is an use after free vulnerability in systemd, published on 19 Feb 2021. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
OSS-Fuzz report: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=31055
Crash type: Heap-double-free
Crash state:
mfree
parse_path_argument
systemctl_parse_argv
Which versions are affected by OSV-2021-418?
1 open source package ship an affected version, including systemd.
| Package | Affected | Fixed in |
|---|---|---|
systemd OSS-Fuzz | All versions | None |
How do I fix OSV-2021-418?
No fix has been published for OSV-2021-418 yet. Limit exposure of the affected software until one is available.
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 OSV-2021-418 being exploited?
There is no known exploitation of OSV-2021-418 in the wild and no public exploit code.