Incorrect Authorization Affecting krb5-server-ldap package, versions <0:1.20.1-8.0.1.el9


Severity

Recommended
0.0
medium
0
10

Based on Oracle Linux security rating.

Threat Intelligence

EPSS
1.29% (86th percentile)

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  • Snyk IDSNYK-ORACLE9-KRB5SERVERLDAP-5536909
  • published16 May 2023
  • disclosed11 Nov 2020

Introduced: 11 Nov 2020

CVE-2020-17049  (opens in a new tab)
CWE-863  (opens in a new tab)

How to fix?

Upgrade Oracle:9 krb5-server-ldap to version 0:1.20.1-8.0.1.el9 or higher.
This issue was patched in ELSA-2023-2570.

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 Oracle. See How to fix? for Oracle:9 relevant fixed versions and status.

A security feature bypass vulnerability exists in the way Key Distribution Center (KDC) determines if a service ticket can be used for delegation via Kerberos Constrained Delegation (KCD). To exploit the vulnerability, a compromised service that is configured to use KCD could tamper with a service ticket that is not valid for delegation to force the KDC to accept it. The update addresses this vulnerability by changing how the KDC validates service tickets used with KCD.

CVSS Scores

version 3.1