CVE-2020-14150 Denial of service in n/a

Medium 5.5 Published 15 Jun 2020 Updated 4 Aug 2024

Attackers can cause a denial of service via application crash in GNU Bison when processing untrusted input under specific compiler conditions.

Exploited in the wild: Not known
Login needed: Any signed-in user
Attackable: Local or same network only
Victim action needed: Not needed
Fix: Available

What is CVE-2020-14150?

CVE-2020-14150 is a medium-severity denial of service vulnerability in n/a, published on 15 Jun 2020. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

GNU Bison before 3.5.4 allows attackers to cause a denial of service (application crash). NOTE: there is a risk only if Bison is used with untrusted input, and an observed bug happens to cause unsafe behavior with a specific compiler/architecture. The bug reports were intended to show that a crash may occur in Bison itself, not that a crash may occur in code that is generated by Bison.

Which versions are affected by CVE-2020-14150?

It affects 1 product.

Products include Gnu Bison.

How do I fix CVE-2020-14150?

Upgrade to a fixed version.

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-2020-14150 being exploited?

There is no known exploitation of CVE-2020-14150 in the wild and no public exploit code.

Sources

Also known as DEBIAN-CVE-2020-14150, GHSA-wqmg-pp5q-5hqr, JLSEC-2026-117, MGASA-2021-0023, UBUNTU-CVE-2020-14150.