CVE-2018-19976

In YARA 3.8.1, bytecode in a specially crafted compiled rule is exposed to information about its...

5.5 MediumFix available

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.

Attack profile

How easy it is to exploit

Attack vector: Local
Complexity: Low
Privileges needed: None
User interaction: Required

What an attacker can affect

Confidentiality: High
Integrity: None
Availability: None

Exploit likelihood

1.32%Up 0.3 points since Apr 14, 2021

What each source reports

NVD Score used 5.5

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.

Record: CVE-2018-19976
CVSS 3.0: 5.5 MediumCVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
CVSS 2.0: 4.3 MediumAV:N/AC:M/Au:N/C:P/I:N/A:N
Weakness: CWE-200
Updated: 2026-11-02

CVE List No score

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.

Record: CVE-2018-19976
Updated: 2026-11-02

EUVDEUVD-2018-11643 No score

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.

Record: EUVD-2018-11643
Updated: 2026-11-03

GitHub AdvisoriesGHSA-wrpm-24mf-gq6c 5.5

In YARA 3.8.1, bytecode in a specially crafted compiled rule is exposed to information about its...

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.

Record: GHSA-wrpm-24mf-gq6c
CVSS 3.0: 5.5 MediumCVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
Weakness: CWE-200
Updated: 2026-11-02

OSV 5.5

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.

Record: CVE-2018-19976
CVSS 3.0: 5.5 MediumCVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
Updated: 2026-11-02

OSVDEBIAN-CVE-2018-19976 5.5

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.

Record: DEBIAN-CVE-2018-19976
CVSS 3.0: 5.5 MediumCVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
Updated: 2026-11-02

OSVUBUNTU-CVE-2018-19976 5.5

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.

Record: UBUNTU-CVE-2018-19976
CVSS 3.0: 5.5 MediumCVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
Updated: 2026-11-02

Affected products

virustotal yara

Affected packages

Affected packages
Package	Affected	Fixed
`yara` Debian:12	before 3.8.1-2	3.8.1-2
`yara` Debian:13	before 3.8.1-2	3.8.1-2
`yara` Debian:14	before 3.8.1-2	3.8.1-2
`yara` Ubuntu:Pro:16.04:LTS	before 3.4.0+dfsg-2ubuntu0.1~esm1, plus listed versions 3.4.0+dfsg-23.4.0+dfsg-2build1	3.4.0+dfsg-2ubuntu0.1~esm1
`yara` Ubuntu:Pro:18.04:LTS	before 3.7.1-1ubuntu2+esm1, plus listed versions 3.6.3+dfsg-1ubuntu13.7.1-1ubuntu13.7.1-1ubuntu2	3.7.1-1ubuntu2+esm1

History

History
Recorded	Changed	Sources
Nov 3, 2026	aliases	EUVD
Nov 2, 2026	first indexed	CVE List, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2018-19976 is a medium vulnerability (CVSS 5.5) in Virustotal Yara, published December 17, 2018. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.32%, the 70th percentile. Fixed in yara 3.8.1-2.

References

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