CVE-2020-15572 Memory corruption in n/a

High 7.5 Published 15 Jul 2020 Updated 4 Aug 2024

Remote attackers can crash Tor instances using NSS via out-of-bounds memory access, requiring specific build configurations.

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

What is CVE-2020-15572?

CVE-2020-15572 is a high-severity memory corruption vulnerability in n/a, published on 15 Jul 2020. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

Tor before 0.4.3.6 has an out-of-bounds memory access that allows a remote denial-of-service (crash) attack against Tor instances built to use Mozilla Network Security Services (NSS), aka TROVE-2020-001.

Weakness: CWE-125

Which versions are affected by CVE-2020-15572?

It affects 1 product.

Products include Torproject Tor.

How do I fix CVE-2020-15572?

Upgrade to a fixed version.

Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.

Is CVE-2020-15572 being exploited?

There is no known exploitation of CVE-2020-15572 in the wild and no public exploit code.

Sources

Also known as DEBIAN-CVE-2020-15572, GHSA-cfp9-244f-h66c.