CVE-2019-5020

Name: CVE-2019-5020
Creator: NVD / NIST
Published: 2019-07-31T17:15:11.387+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.5/10EPSS 1.08%

Last modified Jun 17, 2026

CVE-2019-5020 is a medium-severity vulnerability rated 5.5/10 on the CVSS scale. An exploitable denial of service vulnerability exists in the object lookup functionality of Yara 3.8.1. A specially crafted binary file can cause a negative value to be read to satisfy an assert, resulting in Denial of Service. EPSS estimates a 1.08% chance of exploitation in the next 30 days.

Description

An exploitable denial of service vulnerability exists in the object lookup functionality of Yara 3.8.1. A specially crafted binary file can cause a negative value to be read to satisfy an assert, resulting in Denial of Service. An attacker can create a malicious binary to trigger this vulnerability.

Metrics

CVSS 3.1

5.5/10

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

EPSS Probability

1.08%

60.8th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Virustotal	Yara	3.8.1

References

https://talosintelligence.com/vulnerability_reports/TALOS-2019-0781Exploit, Third Party Advisory
https://talosintelligence.com/vulnerability_reports/TALOS-2019-0781Exploit, Third Party Advisory

Timeline

Published: Jul 31, 2019
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2019-5020?

How severe is CVE-2019-5020?

CVE-2019-5020 has a CVSS score of 5.5/10 (MEDIUM severity). The EPSS model estimates a 1.08% probability of exploitation in the next 30 days.

How do I fix CVE-2019-5020?

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-2019-5020?

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

Scan your code now

Source: NVD / NIST