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VULNERABILITIES

CVE-2018-20217 Details

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.

Metrics

CVSS 3.x Severity and Vector Strings:

NIST: [email protected]CVSS-B:5.3 MEDIUMVector:CVSS:3.1/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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URLSource(s)Tag(s)
http://krbdev.mit.edu/rt/Ticket/Display.html?id=8763 CVEPatchThird Party Advisory
https://github.com/krb5/krb5/commit/5e6d1796106df8ba6bc1973ee0917c170d929086 CVEPatchThird Party Advisory
https://lists.debian.org/debian-lts-announce/2019/01/msg00020.html CVEMailing ListThird Party Advisory
https://lists.debian.org/debian-lts-announce/2021/09/msg00019.html CVEMailing ListThird Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/2KNHELH4YHNT6H2ESJWX2UIDXLBNGB2O/ CVE

see all 12 references

Weakness Enumeration

CWE-IDCWE NameSource
CWE-617Reachable Assertion[email protected]

Affected Products

ProductVersions
mit kerberos
< 5-1.17

CPE

  • cpe:2.3:a:mit:kerberos:*:*:*:*:*:*:*:*

Remediation

  • No remediation found in references.
debian debian linux
8.0
9.0

CPE

  • cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*
  • cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*

Remediation

  • No remediation found in references.

Change History

10 change records found show changes

QUICK INFO

CVE Dictionary Entry:
CVE-2018-20217
NVD Published Date:
Dec 26, 2018
NVD Last Modified:
Jun 17, 2026
Source:
[email protected]
CVE-2018-20217 Details - Not Deferred