Reachable Assertion Affecting krb5-server-ldap package, versions <0:1.15.1-37.el7_7.2


Severity

Recommended
0.0
medium
0
10

Based on Red Hat Enterprise Linux security rating.

Threat Intelligence

EPSS
0.24% (63rd percentile)

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  • Snyk IDSNYK-RHEL7-KRB5SERVERLDAP-7994259
  • published17 Sept 2024
  • disclosed2 Dec 2018

Introduced: 2 Dec 2018

CVE-2018-20217  (opens in a new tab)
CWE-617  (opens in a new tab)

How to fix?

Upgrade RHEL:7 krb5-server-ldap to version 0:1.15.1-37.el7_7.2 or higher.
This issue was patched in RHBA-2019:2599.

NVD Description

Note: Versions mentioned in the description apply only to the upstream krb5-server-ldap package and not the krb5-server-ldap package as distributed by RHEL. See How to fix? for RHEL:7 relevant fixed versions and status.

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.

CVSS Scores

version 3.1