UBUNTU-CVE-2019-3863

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    UBUNTU-CVE-2019-3863

    Published: 25 Mar 2019Last Modified: 22 Apr 2026
    Upstream:
    CVE-2019-3863
    Aliases:
    USN-5308-1

    Summary:

    Details: A flaw was found in libssh2 before 1.8.1 creating a vulnerability on the SSH client side. A server could send a multiple keyboard interactive response messages whose total length are greater than unsigned char max characters. This value is used by the SSH client as an index to copy memory causing in an out of bounds memory write error.

    References: https://ubuntu.com/security/CVE-2019-3863, https://www.libssh2.org/CVE-2019-3863.html, https://github.com/libssh2/libssh2/pull/315, https://ubuntu.com/security/notices/USN-5308-1, https://www.cve.org/CVERecord?id=CVE-2019-3863

    Affected packages

    Package

    Name: libssh2

    Purl: pkg:deb/ubuntu/[email protected]+esm2?arch=source&distro=trusty/esm

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -1.4.3-2ubuntu0.2+esm2

    Affected versions

    1.4.3-1
    1.4.3-2
    1.4.3-2ubuntu0.1
    1.4.3-2ubuntu0.2
    1.4.3-2ubuntu0.2+esm1

    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