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Improperly Implemented Security Check for Standard Affecting heimdal package, versions <1.7~git20150920+dfsg-4ubuntu1.16.04.1+esm1

medium

Snyk CVSS

    Attack Complexity High
    Confidentiality High
    Integrity High
    Availability High

    Threat Intelligence

    EPSS 0.29% (69th percentile)
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NVD
7.5 high
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Red Hat
7.5 high

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  • Snyk ID SNYK-UBUNTU1604-HEIMDAL-3037292
  • published 14 May 2019
  • disclosed 31 Jul 2019
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Introduced: 14 May 2019

CVE-2018-16860 Open this link in a new tab
CWE-358 Open this link in a new tab

How to fix?

Upgrade Ubuntu:16.04 heimdal to version 1.7~git20150920+dfsg-4ubuntu1.16.04.1+esm1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream heimdal package and not the heimdal package as distributed by Ubuntu. See How to fix? for Ubuntu:16.04 relevant fixed versions and status.

A flaw was found in samba's Heimdal KDC implementation, versions 4.8.x up to, excluding 4.8.12, 4.9.x up to, excluding 4.9.8 and 4.10.x up to, excluding 4.10.3, when used in AD DC mode. A man in the middle attacker could use this flaw to intercept the request to the KDC and replace the user name (principal) in the request with any desired user name (principal) that exists in the KDC effectively obtaining a ticket for that principal.

References