CVE-2018-1139

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    CVE-2018-1139

    Published: 22 Aug 2018Last Modified: 8 Jul 2026

    Summary:

    Details: A flaw was found in the way samba before 4.7.9 and 4.8.4 allowed the use of weak NTLMv1 authentication even when NTLMv1 was explicitly disabled. A man-in-the-middle attacker could use this flaw to read the credential and other details passed between the samba server and client.

    References: http://www.securityfocus.com/bid/105084, https://access.redhat.com/errata/RHSA-2018:2612, https://access.redhat.com/errata/RHSA-2018:2613, https://access.redhat.com/errata/RHSA-2018:3056, https://security.gentoo.org/glsa/202003-52, https://security.netapp.com/advisory/ntap-20180814-0001/, https://usn.ubuntu.com/3738-1/, https://www.samba.org/samba/security/CVE-2018-1139.html, https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-1139

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: GIT

    Events:

    Introduced- d1e69845e28c20a491c4cd60c712b46ddfcb9dc0
    Fixed -3e5da7e8878a78da96fbdccd05953c791560a6b5

    Affected versions

    samba-4.7.8
    samba-4.7.7
    samba-4.7.5
    samba-4.7.4
    samba-4.7.2
    samba-4.7.1
    samba-4.7.0

    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