UBUNTU-CVE-2018-6789

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    UBUNTU-CVE-2018-6789

    Published: 7 Feb 2018Last Modified: 22 Apr 2026
    Upstream:
    CVE-2018-6789
    Aliases:
    USN-3565-1

    Summary:

    Details: An issue was discovered in the base64d function in the SMTP listener in Exim before 4.90.1. By sending a handcrafted message, a buffer overflow may happen. This can be used to execute code remotely.

    References: https://ubuntu.com/security/CVE-2018-6789, http://www.openwall.com/lists/oss-security/2018/02/07/2, https://exim.org/static/doc/security/CVE-2018-6789.txt, https://ubuntu.com/security/notices/USN-3565-1, https://www.cve.org/CVERecord?id=CVE-2018-6789, https://www.cisa.gov/known-exploited-vulnerabilities-catalog

    Affected packages

    Package

    Name: exim4

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

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -4.82-3ubuntu2.4

    Affected versions

    4.80-7ubuntu3

    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