CVE-2019-15879 Use after free in FreeBSD

High 7.4 Published 13 May 2020 Updated 5 Aug 2024

A race condition in the FreeBSD cryptodev module allows unprivileged users to overwrite arbitrary kernel memory, leading to privilege escalation.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Over the internet
Victim action needed: Not needed
Fix: None listed

What is CVE-2019-15879?

CVE-2019-15879 is a high-severity use after free vulnerability in Freebsd Freebsd, published on 13 May 2020. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

In FreeBSD 12.1-STABLE before r356908, 12.1-RELEASE before p5, 11.3-STABLE before r356908, and 11.3-RELEASE before p9, a race condition in the cryptodev module permitted a data structure in the kernel to be used after it was freed, allowing an unprivileged process can overwrite arbitrary kernel memory.

Weakness: CWE-772, CWE-362

Which versions are affected by CVE-2019-15879?

It affects 1 product.

Products include Freebsd Freebsd.

How do I fix CVE-2019-15879?

No fix has been published for CVE-2019-15879 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-2019-15879 being exploited?

There is no known exploitation of CVE-2019-15879 in the wild and no public exploit code.

All Freebsd Freebsd vulnerabilities

Sources

Also known as GHSA-jhpx-hv8x-hgq4.