CVE-2020-23911 Null dereference in n/a

Medium 5.5 Published 18 Jul 2023 Updated 28 Oct 2024

A NULL pointer dereference in asn1c allows attackers to 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-2020-23911?

CVE-2020-23911 is a medium-severity vulnerability in n/a, published on 18 Jul 2023. 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 issue was discovered in asn1c through v0.9.28. A NULL pointer dereference exists in the function _default_error_logger() located in asn1fix.c. It allows an attacker to cause Denial of Service.

Weakness: CWE-476

Which versions are affected by CVE-2020-23911?

It affects 1 product.

Products include Asn1c Project Asn1c.

How do I fix CVE-2020-23911?

No fix has been published for CVE-2020-23911 yet. Limit exposure of the affected software until one is available.

Is CVE-2020-23911 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2020-23911 exists.

Sources

Also known as DEBIAN-CVE-2020-23911, GHSA-g4q7-qpw3-v546, UBUNTU-CVE-2020-23911.