CVE & CISA-KEV Catalog

CVE-2018-16860

HIGHEPSS 83th pctl
7.5
CVSS v3
NVD

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.

CWE-358

How to fix

Remediation Available
heimdalDebian
Fixed in:7.5.0+dfsg-3CVE-2018-16860
Fixed in:7.5.0+dfsg-3CVE-2018-16860
Fixed in:7.5.0+dfsg-3CVE-2018-16860
Fixed in:7.5.0+dfsg-3CVE-2018-16860
heimdalUbuntu
Fixed in:1.6~git20131207+dfsg-1ubuntu1.2+esm1USN-5675-1
Fixed in:1.7~git20150920+dfsg-4ubuntu1.16.04.1+esm1USN-5675-1
Fixed in:7.5.0+dfsg-1ubuntu0.1USN-5675-1
Fixed in:7.7.0+dfsg-1ubuntu1.1USN-5675-1
heimdal-clientsUbuntu
Fixed in:1.6~git20131207+dfsg-1ubuntu1.2+esm1USN-5675-1
Fixed in:1.7~git20150920+dfsg-4ubuntu1.16.04.1+esm1USN-5675-1
Fixed in:7.5.0+dfsg-1ubuntu0.1USN-5675-1
Fixed in:7.7.0+dfsg-1ubuntu1.1USN-5675-1
heimdal-clients-xUbuntu
Fixed in:1.6~git20131207+dfsg-1ubuntu1.2+esm1USN-5675-1
heimdal-kcmUbuntu
Fixed in:1.6~git20131207+dfsg-1ubuntu1.2+esm1USN-5675-1
Fixed in:1.7~git20150920+dfsg-4ubuntu1.16.04.1+esm1USN-5675-1
Fixed in:7.5.0+dfsg-1ubuntu0.1USN-5675-1
Fixed in:7.7.0+dfsg-1ubuntu1.1USN-5675-1
heimdal-kdcUbuntu
Fixed in:1.6~git20131207+dfsg-1ubuntu1.2+esm1USN-5675-1
Fixed in:1.7~git20150920+dfsg-4ubuntu1.16.04.1+esm1USN-5675-1
Fixed in:7.5.0+dfsg-1ubuntu0.1USN-5675-1
Fixed in:7.7.0+dfsg-1ubuntu1.1USN-5675-1
heimdal-serversUbuntu
Fixed in:1.6~git20131207+dfsg-1ubuntu1.2+esm1USN-5675-1
Fixed in:1.7~git20150920+dfsg-4ubuntu1.16.04.1+esm1USN-5675-1
Fixed in:7.5.0+dfsg-1ubuntu0.1USN-5675-1
Fixed in:7.7.0+dfsg-1ubuntu1.1USN-5675-1
heimdal-servers-xUbuntu
Fixed in:1.6~git20131207+dfsg-1ubuntu1.2+esm1USN-5675-1
libgssapi3-heimdalUbuntu
Fixed in:1.6~git20131207+dfsg-1ubuntu1.2+esm1USN-5675-1
Fixed in:1.7~git20150920+dfsg-4ubuntu1.16.04.1+esm1USN-5675-1
Fixed in:7.5.0+dfsg-1ubuntu0.1USN-5675-1
Fixed in:7.7.0+dfsg-1ubuntu1.1USN-5675-1
libkdc2-heimdalUbuntu
Fixed in:1.6~git20131207+dfsg-1ubuntu1.2+esm1USN-5675-1
Fixed in:1.7~git20150920+dfsg-4ubuntu1.16.04.1+esm1USN-5675-1
Fixed in:7.5.0+dfsg-1ubuntu0.1USN-5675-1
Fixed in:7.7.0+dfsg-1ubuntu1.1USN-5675-1
libkrb5-26-heimdalUbuntu
Fixed in:1.6~git20131207+dfsg-1ubuntu1.2+esm1USN-5675-1
Fixed in:1.7~git20150920+dfsg-4ubuntu1.16.04.1+esm1USN-5675-1
Fixed in:7.5.0+dfsg-1ubuntu0.1USN-5675-1
Fixed in:7.7.0+dfsg-1ubuntu1.1USN-5675-1
sambaUbuntu
Fixed in:2:4.3.11+dfsg-0ubuntu0.14.04.20+esm1USN-3976-2
Fixed in:2:4.3.11+dfsg-0ubuntu0.16.04.20USN-3976-1
Fixed in:2:4.7.6+dfsg~ubuntu-0ubuntu2.10USN-3976-1

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork
Attack ComplexityHigh
Privileges RequiredLow
User InteractionNone
ScopeUnchanged

Impact

ConfidentialityHigh
IntegrityHigh
AvailabilityHigh

CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

Exploit Intelligence

2.49%probability of exploitation in 30 days
83rdpercentile

Elevated risk: more likely to be exploited than 83% of all known CVEs.

References

Vendor Advisory1
Third-Party Advisory1
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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2024-11-21.