UBUNTU-CVE-2019-3857

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    UBUNTU-CVE-2019-3857

    Published: 25 Mar 2019Last Modified: 22 Apr 2026
    Upstream:
    CVE-2019-3857
    Aliases:
    USN-5308-1

    Summary:

    Details: An integer overflow flaw which could lead to an out of bounds write was discovered in libssh2 before 1.8.1 in the way SSH_MSG_CHANNEL_REQUEST packets with an exit signal are parsed. A remote attacker who compromises a SSH server may be able to execute code on the client system when a user connects to the server.

    References: https://ubuntu.com/security/CVE-2019-3857, https://www.libssh2.org/CVE-2019-3857.html, https://github.com/libssh2/libssh2/pull/315, https://ubuntu.com/security/notices/USN-5308-1, https://www.cve.org/CVERecord?id=CVE-2019-3857

    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