CVE-2018-20217

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CVSS 3.1

5.3 medium

EPSS

1%p71

Published

Dec 26, 2018 (Dec 26, 2018)

Modified

Jun 17, 2026

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.

Vendors: mit debian
Products: kerberos, debian linux
Weakness: CWE-617
Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H

NVD CVE.org GitHub PoCs EPSS (1.4%)

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