UBUNTU-CVE-2018-19974

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    UBUNTU-CVE-2018-19974

    Published: 17 Dec 2018Last Modified: 22 Apr 2026
    Upstream:
    CVE-2018-19974
    Aliases:
    USN-8080-1

    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://ubuntu.com/security/CVE-2018-19974, https://github.com/VirusTotal/yara/issues/999, https://bnbdr.github.io/posts/extracheese/, https://github.com/bnbdr/swisscheese/, https://www.cve.org/CVERecord?id=CVE-2018-19974, https://ubuntu.com/security/notices/USN-8080-1

    Affected packages

    Package

    Name: yara

    Purl: pkg:deb/ubuntu/[email protected]+dfsg-2ubuntu0.1~esm1?arch=source&distro=esm-apps/xenial

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -3.4.0+dfsg-2ubuntu0.1~esm1

    Affected versions

    3.4.0+dfsg-2
    3.4.0+dfsg-2build1

    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