CVE Vulnerability

CVE-2018-20217

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.

3.5 /10

CVSS v2.0 :

V3 Legend

Vector :

Exploitability : 6.8 / Impact : 2.9

Attack Vector

Attack Complexity

Privileges Required

User Interaction

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact PARTIAL

Scope

5.3 /10

CVSS v3.0 : MEDIUM

V3 Legend

Vector :

Exploitability : 1.6 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity HIGH

Privileges Required LOW

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References
Link Resource
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/2KNHELH4YHNT6H2ESJWX2UIDXLBNGB2O/ Third Party Advisory
https://github.com/krb5/krb5/commit/5e6d1796106df8ba6bc1973ee0917c170d929086 Patch Third Party Advisory
http://krbdev.mit.edu/rt/Ticket/Display.html?id=8763 Patch Third Party Advisory
https://lists.debian.org/debian-lts-announce/2019/01/msg00020.html Mailing List Third Party Advisory
https://security.netapp.com/advisory/ntap-20190416-0006/ Third Party Advisory
https://lists.debian.org/debian-lts-announce/2021/09/msg00019.html Mailing List Third Party Advisory
Configurations

Configuration 1

cpe:2.3:a:mit:kerberos:*:*:*:*:*:*:*:*
cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*
cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*
Information

Published : 2018-12-26 09:29

Updated : 2021-10-18 12:03

NVD link : CVE-2018-20217

Mitre link : CVE-2018-20217

Products Affected
No products.
CWE
CWE-617