UBUNTU-CVE-2020-8794

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    UBUNTU-CVE-2020-8794

    Published: 25 Feb 2020Last Modified: 28 Apr 2026
    Upstream:
    CVE-2020-8794

    Summary:

    Details: OpenSMTPD before 6.6.4 allows remote code execution because of an out-of-bounds read in mta_io in mta_session.c for multi-line replies. Although this vulnerability affects the client side of OpenSMTPD, it is possible to attack a server because the server code launches the client code during bounce handling.

    References: https://ubuntu.com/security/CVE-2020-8794, https://ubuntu.com/security/notices/USN-4294-1, https://ubuntu.com/security/notices/USN-4875-1, https://www.cve.org/CVERecord?id=CVE-2020-8794

    Affected packages

    Package

    Name: opensmtpd

    Purl: pkg:deb/ubuntu/[email protected]~esm2?arch=source&distro=esm-apps/xenial

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -5.7.3p2-1ubuntu0.1~esm2

    Affected versions

    5.4.2p1-4

    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
    UBUNTU-CVE-2020-8794 | CVE-DB