CVE-2021-33480 Use after free in gocr

Medium 5.5 Published 17 Nov 2021 Updated 3 Aug 2024

A use-after-free flaw in gocr allows attackers to execute arbitrary code or cause a denial of service via crafted input.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Local or same network only
Victim action needed: A user has to click or open something
Fix: None listed

What is CVE-2021-33480?

CVE-2021-33480 is a medium-severity use after free vulnerability in gocr, published on 17 Nov 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

An use-after-free vulnerability was discovered in gocr through 0.53-20200802 in context_correction() in pgm2asc.c.

Weakness: CWE-416

Which versions are affected by CVE-2021-33480?

It affects 1 product.

Products include Optical Character Recognition Project Optical Character Recognition.

How do I fix CVE-2021-33480?

No fix has been published for CVE-2021-33480 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-2021-33480 being exploited?

There is no known exploitation of CVE-2021-33480 in the wild and no public exploit code.

Sources

Also known as DEBIAN-CVE-2021-33480, GHSA-882j-jq8h-6p6f, UBUNTU-CVE-2021-33480.