CVE-2022-1212 Use-After-Free in str_escape in mruby/mruby in mruby/mruby

Critical 9.3 Published 5 Apr 2022 Updated 2 Aug 2024

A use-after-free vulnerability in the str_escape function of the mruby library allows attackers to potentially execute arbitrary code.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Over the internet
Victim action needed: Not needed
Fix: Available

What is CVE-2022-1212?

CVE-2022-1212 is a critical use after free vulnerability in mruby/mruby, published on 5 Apr 2022. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

Use-After-Free in str_escape in mruby/mruby in GitHub repository mruby/mruby prior to 3.2. Possible arbitrary code execution if being exploited.

Weakness: CWE-416

Which versions are affected by CVE-2022-1212?

It affects 1 product.

Products include Mruby Mruby.

How do I fix CVE-2022-1212?

Upgrade to a fixed version.

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-2022-1212 being exploited?

There is no known exploitation of CVE-2022-1212 in the wild and no public exploit code.

Sources

Also known as DEBIAN-CVE-2022-1212, GHSA-xh66-6mj6-94rg, UBUNTU-CVE-2022-1212.