CVE-2018-19974

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Published Dec 17, 2018 CVSS 3.0 · 5.5 Medium EPSS 1.3% KEV · Not listed

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).

Affected Products

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions

n/a

n/a

affected

Version	Status	Constraints
`n/a`	affected	—

Configuration 1 [-]

cpe:2.3:a:virustotal:yara:3.8.1:*:*:*:*:*:*:*

No data.

No data available yet.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

Source	ID	Title
EUVD	EUVD-2018-11641	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).
Ubuntu USN	USN-8080-1	YARA vulnerabilities

Metrics

No CVSS v4.0

No CVSS v3.1

Attack Vector Local

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact High

Integrity Impact None

Availability Impact None

User Interaction Required

Access Vector Network

Access Complexity Medium

Authentication None

Confidentiality Impact Partial

Integrity Impact None

Availability Impact None

This CVE is not in the KEV list.

Exploit prediction score: 1.3% (1.265% probability within 30 days)

Key SSVC decision points have not yet been added.

References

Link	Providers
https://bnbdr.github.io/posts/extracheese/
https://github.com/VirusTotal/yara/issues/999
https://github.com/bnbdr/swisscheese/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/DFFXDAMP6GJ337LIOTVF5I4T6QGMN3ZR/

History

No history.

Subscriptions

Virustotal Yara

Weaknesses

CWE-908

Sources

CVE record Updated: Aug 5, 2024, 11:51 AM

Status: PUBLISHED
Assigner: mitre
Published: Dec 17, 2018, 6:00 PM
Updated: Aug 5, 2024, 11:51 AM
Reserved: Dec 8, 2018, 12:00 AM

View source JSON

Vulnrichment No data

No data.

NVD Updated: Jun 17, 2026, 1:50 AM

Status: Modified
Published: Dec 17, 2018, 7:29 PM
Modified: Jun 17, 2026, 1:50 AM

View source JSON

Red Hat No data

No data.

OpenCVE enrichment No data

No data.

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