UBUNTU-CVE-2018-20022

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    UBUNTU-CVE-2018-20022

    Published: 19 Dec 2018Last Modified: 20 May 2026
    Upstream:
    CVE-2018-20022
    Aliases:
    USN-3877-1
    USN-4547-1
    USN-4547-2

    Summary:

    Details: LibVNC before 2f5b2ad1c6c99b1ac6482c95844a84d66bb52838 contains multiple weaknesses CWE-665: Improper Initialization vulnerability in VNC client code that allows attacker to read stack memory and can be abuse for information disclosure. Combined with another vulnerability, it can be used to leak stack memory layout and in bypassing ASLR

    References: https://ubuntu.com/security/CVE-2018-20022, https://ics-cert.kaspersky.com/advisories/klcert-advisories/2018/12/19/klcert-18-032-libvnc-multiple-memory-leaks/, 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-2018-20022

    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