CVE-2021-43412 Use after free in n/a
A use-after-free vulnerability in GNU Hurd allows local attackers to escalate privileges to root by sending fake notification messages.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2021-43412?
CVE-2021-43412 is a high-severity use after free vulnerability in n/a, published on 7 Nov 2021. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
An issue was discovered in GNU Hurd before 0.9 20210404-9. libports accepts fake notification messages from any client on any port, which can lead to port use-after-free. This can be exploited for local privilege escalation to get full root access.
Weakness: CWE-416
Which versions are affected by CVE-2021-43412?
It affects 1 product.
Products include Gnu Hurd.
How do I fix CVE-2021-43412?
No fix has been published for CVE-2021-43412 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 CVE-2021-43412 being exploited?
There is no known exploitation of CVE-2021-43412 in the wild and no public exploit code.
Other vulnerabilities in n/a
Sources
Also known as GHSA-x9rv-39rr-f53c.