UBUNTU-CVE-2018-20020

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    UBUNTU-CVE-2018-20020

    Published: 19 Dec 2018Last Modified: 20 May 2026
    Upstream:
    CVE-2018-20020
    Aliases:
    USN-3877-1
    USN-4547-1
    USN-4547-2

    Summary:

    Details: LibVNC before commit 7b1ef0ffc4815cab9a96c7278394152bdc89dc4d contains heap out-of-bound write vulnerability inside structure in VNC client code that can result remote code execution

    References: https://ubuntu.com/security/CVE-2018-20020, https://ics-cert.kaspersky.com/advisories/klcert-advisories/2018/12/19/klcert-18-030-libvnc-heap-out-of-bound-write/, https://ubuntu.com/security/notices/USN-3877-1, https://ubuntu.com/security/notices/USN-4547-1, https://ubuntu.com/security/notices/USN-4547-2, https://ubuntu.com/security/notices/USN-4587-1, https://www.cve.org/CVERecord?id=CVE-2018-20020

    Affected packages

    Package

    Name: libvncserver

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

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -0.9.9+dfsg-1ubuntu1.4

    Affected versions

    0.9.9+dfsg-1
    0.9.9+dfsg-1ubuntu1
    0.9.9+dfsg-1ubuntu1.1
    0.9.9+dfsg-1ubuntu1.2
    0.9.9+dfsg-1ubuntu1.3

    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