National Vulnerability Database

National Vulnerability Database

National Vulnerability
Database

CVE-2018-20217 Detail

Current Description

A Reachable Assertion issue was discovered in the KDC in MIT Kerberos 5 (aka krb5) before 1.17. If an attacker can obtain a krbtgt ticket using an older encryption type (single-DES, triple-DES, or RC4), the attacker can crash the KDC by making an S4U2Self request.

Source:  MITRE
View Analysis Description

Severity



CVSS 3.x Severity and Metrics:

NIST CVSS score
NIST: NVD
Base Score: 5.3 MEDIUM
Vector:  CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H

References to Advisories, Solutions, and Tools

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Hyperlink Resource
http://krbdev.mit.edu/rt/Ticket/Display.html?id=8763 Patch Third Party Advisory
https://github.com/krb5/krb5/commit/5e6d1796106df8ba6bc1973ee0917c170d929086 Patch Third Party Advisory
https://lists.debian.org/debian-lts-announce/2019/01/msg00020.html Mailing List Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/2KNHELH4YHNT6H2ESJWX2UIDXLBNGB2O/ Third Party Advisory
https://security.netapp.com/advisory/ntap-20190416-0006/

Weakness Enumeration

CWE-ID CWE Name Source
CWE-617 Reachable Assertion NIST  

Known Affected Software Configurations Switch to CPE 2.2

Configuration 1 ( hide )
 cpe:2.3:a:mit:kerberos:*:*:*:*:*:*:*:*
     Show Matching CPE(s)
Up to (excluding)
5-1.17

Configuration 2 ( hide )
 cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*
     Show Matching CPE(s)


Change History

4 change records found - show changes

Quick Info

CVE Dictionary Entry:
CVE-2018-20217
NVD Published Date:
12/26/2018
NVD Last Modified:
10/02/2019