Incorrect Authorization Affecting krb5-workstation package, versions <0:1.20.1-8.el9


Severity

Recommended
0.0
medium
0
10

Based on AlmaLinux security rating.

Threat Intelligence

EPSS
1.29% (86th percentile)

Do your applications use this vulnerable package?

In a few clicks we can analyze your entire application and see what components are vulnerable in your application, and suggest you quick fixes.

Test your applications

Snyk Learn

Learn about Incorrect Authorization vulnerabilities in an interactive lesson.

Start learning
  • Snyk IDSNYK-ALMALINUX9-KRB5WORKSTATION-5642604
  • published28 May 2023
  • disclosed9 May 2023

Introduced: 9 May 2023

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

How to fix?

Upgrade AlmaLinux:9 krb5-workstation to version 0:1.20.1-8.el9 or higher.
This issue was patched in ALSA-2023:2570.

NVD Description

Note: Versions mentioned in the description apply only to the upstream krb5-workstation package and not the krb5-workstation package as distributed by AlmaLinux. See How to fix? for AlmaLinux: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