CVE-2021-32494 Denial of service in radare2

Critical 10.0 Published 7 Jul 2023 Updated 12 Nov 2024

Attackers can cause denial of service in Radare2 by providing malicious Mach-O inputs that trigger a division by zero error.

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-2021-32494?

CVE-2021-32494 is a critical denial of service vulnerability in Radare Radare2, published on 7 Jul 2023. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

Radare2 has a division by zero vulnerability in Mach-O parser's rebase_buffer function. This allow attackers to create malicious inputs that can cause denial of service.

Weakness: CWE-369

Which versions are affected by CVE-2021-32494?

It affects 1 product.

Products include Radare Radare2.

How do I fix CVE-2021-32494?

No fix has been published for CVE-2021-32494 yet. Limit exposure of the affected software until one is available.

Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.

Is CVE-2021-32494 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2021-32494 exists.

All Radare Radare2 vulnerabilities

Sources

Also known as GHSA-v4qw-9ffj-jq3x, UBUNTU-CVE-2021-32494.