CVE-2018-19974

Name: CVE-2018-19974
Creator: NVD / NIST
Published: 2018-12-17T19:29:01.08+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

UnknownEPSS 1.28%

Last modified Jun 17, 2026

CVE-2018-19974 is a vulnerability of currently unknown severity. 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).. EPSS estimates a 1.28% chance of exploitation in the next 30 days.

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).

Metrics

EPSS Probability

1.28%

66.3th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-908

Affected Software

Vendor	Product	Versions
Virustotal	Yara	3.8.1

References

https://bnbdr.github.io/posts/extracheese/Exploit, Third Party Advisory
https://github.com/VirusTotal/yara/issues/999Exploit, Issue Tracking, Third Party Advisory
https://github.com/bnbdr/swisscheese/Exploit, Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/DFFXDAMP6GJ337LIOTVF5I4T6QGMN3ZR/
https://bnbdr.github.io/posts/extracheese/Exploit, Third Party Advisory
https://github.com/VirusTotal/yara/issues/999Exploit, Issue Tracking, Third Party Advisory
https://github.com/bnbdr/swisscheese/Exploit, Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/DFFXDAMP6GJ337LIOTVF5I4T6QGMN3ZR/

Timeline

Published: Dec 17, 2018
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2018-19974?

How severe is CVE-2018-19974?

Severity scoring for CVE-2018-19974 is pending analysis. The EPSS model estimates a 1.28% probability of exploitation in the next 30 days.

How do I fix CVE-2018-19974?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2018-19974?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST