CVE-2018-19974 Information disclosure in n/a

Medium 5.5 Published 17 Dec 2018 Updated 5 Aug 2024

Attackers can read uninitialized memory to discover real stack addresses in YARA, potentially aiding further exploitation.

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: Available

What is CVE-2018-19974?

CVE-2018-19974 is a medium-severity vulnerability in n/a, published on 17 Dec 2018. 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

In YARA 3.8.1, bytecode in a specially crafted compiled rule can read uninitialized data from VM scratch memory in libyara/exec.c. This can allow attackers to discover addresses in the real stack (not the YARA virtual stack).

Weakness: CWE-908

Which versions are affected by CVE-2018-19974?

It affects 1 product.

Products include Virustotal Yara.

How do I fix CVE-2018-19974?

Upgrade to a fixed version.

Is CVE-2018-19974 being exploited?

There is no known exploitation of CVE-2018-19974 in the wild and no public exploit code.

Sources

Also known as DEBIAN-CVE-2018-19974, GHSA-qgr5-73wm-7w3g, UBUNTU-CVE-2018-19974.