PYSEC-2017-66

    Dashboard / Vulnerabilities / PYSEC-2017-66

    PYSEC-2017-66

    Published: 25 Aug 2017Last Modified: 10 Jun 2026

    Summary:

    Details: The checkPassword function in python-kerberos does not authenticate the KDC it attempts to communicate with, which allows remote attackers to cause a denial of service (bad response), or have other unspecified impact by performing a man-in-the-middle attack.

    References: https://pypi.python.org/pypi/kerberos, https://github.com/apple/ccs-pykerberos/issues/31, https://bugzilla.redhat.com/show_bug.cgi?id=1223802, http://www.securityfocus.com/bid/74760, http://www.openwall.com/lists/oss-security/2015/05/21/3, https://github.com/advisories/GHSA-mffc-9gx5-99g3

    Affected packages

    Package

    Name: pykerberos

    Purl: pkg:pypi/pykerberos

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -1.1.6

    Affected versions

    1.1.3
    1.1.4
    1.1.5

    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