CVE-2018-16860
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.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (2.49%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
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.
- CVSS 3.0
- 7.5 HIGHCVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 2.49% probability · 84th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-358
- Affected
- samba/samba · heimdal project/heimdal
- Source
- secalert@redhat.com
References
- http://lists.opensuse.org/opensuse-security-announce/2019-08/msg00026.html
- 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
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-16860Issue Tracking, Third Party Advisory
- 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://security.gentoo.org/glsa/202003-52
- https://support.apple.com/HT210346
- https://support.apple.com/HT210348
- https://support.apple.com/HT210351
- https://support.apple.com/HT210353
- https://www.samba.org/samba/security/CVE-2018-16860.htmlMitigation, Vendor Advisory
- https://www.synology.com/security/advisory/Synology_SA_19_23
- http://lists.opensuse.org/opensuse-security-announce/2019-08/msg00026.html
- 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
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-16860Issue Tracking, Third Party Advisory
- 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://security.gentoo.org/glsa/202003-52
- https://support.apple.com/HT210346
- https://support.apple.com/HT210348
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.