CVE-2018-19976

medium

Description

In YARA 3.8.1, bytecode in a specially crafted compiled rule is exposed to information about its environment, in libyara/exec.c. This is a consequence of the design of the YARA virtual machine.

References

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/DFFXDAMP6GJ337LIOTVF5I4T6QGMN3ZR/

https://github.com/bnbdr/swisscheese/

https://github.com/VirusTotal/yara/issues/999

https://euvd.enisa.europa.eu/vulnerability/EUVD-2018-11643

https://bnbdr.github.io/posts/extracheese/

Details

Source: Mitre, NVD

Published: 2018-12-17

Updated: 2026-06-17

Risk Information

CVSS v2

Base Score: 4.3

Vector: CVSS2#AV:N/AC:M/Au:N/C:P/I:N/A:N

Severity: Medium

CVSS v3

Base Score: 5.5

Vector: CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N