CVE-2018-19974

    Dashboard / Vulnerabilities / CVE-2018-19974

    CVE-2018-19974

    Published: 17 Dec 2018Last Modified: 8 Jul 2026

    Summary:

    Details: 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).

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

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: GIT

    Events:

    Introduced- 309894830a5f9ff8cc22155d7719ea608de7bc9d
    Fixed -None

    Affected versions

    3.8.1

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High