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CVE-2018-16860

HIGH
7.5
CVSS Score
Published: July 31, 2019 at 02:38 PM UTC
Updated: June 17, 2026 at 01:44 AM UTC
2 products affected across 2 vendorsSAMBAHeimdal

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Severity
HIGH7.5
Exploit prediction
EPSS 2%

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Heimdal· Heimdal Project
95%
0.8 ≤ v ≤ 7.5.0
SAMBA· Samba
95%
4.10.0 ≤ v < 4.10.34.8.0 ≤ v < 4.8.124.9.0 ≤ v < 4.9.84.10.x up to, excluding 4.10.34.8.x up to, excluding 4.8.124.9.x up to, excluding 4.9.8
Affected range stops below 4.10.3, so it looks safe — our inference, not a vendor statement
Affected range stops below 4.8.12, so it looks safe — our inference, not a vendor statement
Affected range stops below 4.9.8, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (17)

Vendor Advisoryx_refsource_SUSE
Source: [email protected]
http://lists.opensuse.org/opensuse-security-announce/2019-08/msg00026.html
Mailing Listx_refsource_FULLDISC
Source: [email protected]
http://seclists.org/fulldisclosure/2019/Aug/11
Mailing Listx_refsource_FULLDISC
Source: [email protected]
http://seclists.org/fulldisclosure/2019/Aug/13
Mailing Listx_refsource_FULLDISC
Source: [email protected]
http://seclists.org/fulldisclosure/2019/Aug/14
Mailing Listx_refsource_FULLDISC
Source: [email protected]
http://seclists.org/fulldisclosure/2019/Aug/15
x_refsource_CONFIRMIssue TrackingThird Party Advisory
Source: [email protected]
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-16860
Mailing Listx_refsource_BUGTRAQ
Source: [email protected]
https://seclists.org/bugtraq/2019/Aug/21
Mailing Listx_refsource_BUGTRAQ
Source: [email protected]
https://seclists.org/bugtraq/2019/Aug/22

CVSS

7.5HIGHredhat
Attack Vector
NETWORK
Complexity
HIGH
Privileges
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-358

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