Improperly Implemented Security Check for Standard Affecting heimdal package, versions <1.7~git20150920+dfsg-4ubuntu1.16.04.1+esm1
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-UBUNTU1604-HEIMDAL-3037292
- published14 May 2019
- disclosed31 Jul 2019
Introduced: 14 May 2019
CVE-2018-16860 (opens 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
- http://people.ubuntu.com/~ubuntu-security/cve/CVE-2018-16860
- https://seclists.org/bugtraq/2019/Aug/21
- https://seclists.org/bugtraq/2019/Aug/22
- https://seclists.org/bugtraq/2019/Aug/23
- https://seclists.org/bugtraq/2019/Aug/25
- https://support.apple.com/HT210346
- https://support.apple.com/HT210348
- https://support.apple.com/HT210351
- https://support.apple.com/HT210353
- https://www.synology.com/security/advisory/Synology_SA_19_23
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-16860
- https://security-tracker.debian.org/tracker/CVE-2018-16860
- https://security.gentoo.org/glsa/202003-52
- https://www.samba.org/samba/security/CVE-2018-16860.html
- http://lists.opensuse.org/opensuse-security-announce/2019-08/msg00026.html
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-16860
- http://seclists.org/fulldisclosure/2019/Aug/11
- http://seclists.org/fulldisclosure/2019/Aug/13
- http://seclists.org/fulldisclosure/2019/Aug/14
- http://seclists.org/fulldisclosure/2019/Aug/15