UBUNTU-CVE-2017-18922

    Dashboard / Vulnerabilities / UBUNTU-CVE-2017-18922

    UBUNTU-CVE-2017-18922

    Published: 30 Jun 2020Last Modified: 20 May 2026
    Upstream:
    CVE-2017-18922
    Aliases:
    USN-4407-1

    Summary:

    Details: It was discovered that websockets.c in LibVNCServer prior to 0.9.12 did not properly decode certain WebSocket frames. A malicious attacker could exploit this by sending specially crafted WebSocket frames to a server, causing a heap-based buffer overflow.

    References: https://ubuntu.com/security/CVE-2017-18922, https://www.openwall.com/lists/oss-security/2020/06/30/2, https://ubuntu.com/security/notices/USN-4407-1, https://www.cve.org/CVERecord?id=CVE-2017-18922

    Affected packages

    Package

    Name: x11vnc

    Purl: pkg:deb/ubuntu/x11vnc?arch=source&distro=trusty

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -None

    Affected versions

    0.9.13-1.1

    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