CVE-2021-36222

HIGH7.5EPSS 6.6%

krb5 - security update

Published: 7/22/2021Modified: 3/9/2026

Also known as:DSA-4944-1ALPINE-CVE-2021-36222DEBIAN-CVE-2021-36222

Description

ec_verify in kdc/kdc_preauth_ec.c in the Key Distribution Center (KDC) in MIT Kerberos 5 (aka krb5) before 1.18.4 and 1.19.x before 1.19.2 allows remote attackers to cause a NULL pointer dereference and daemon crash. This occurs because a return value is not properly managed in a certain situation.

Affected packages (3)

Alpine/krb5from 0, < 1.18.4-r0
Debian/krb5from 0, < 1.18.3-6
Debian/krb5from 0, < 1.17-3+deb10u2

CVSS scores

Source	Version	Severity	Vector
osv	CVSS 3.1	HIGH7.5	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

References (2)

ADVISORYhttps://security.alpinelinux.org/vuln/CVE-2021-36222
ADVISORYhttps://security-tracker.debian.org/tracker/CVE-2021-36222