Incorrect Authorization Affecting krb5-workstation package, versions <0:1.20.1-8.el9
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Test your applications- Snyk ID SNYK-ALMALINUX9-KRB5WORKSTATION-5642604
- published 28 May 2023
- disclosed 9 May 2023
Introduced: 9 May 2023
CVE-2020-17049 Open this link in a new tabHow 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.
References
- https://errata.almalinux.org/9/ALSA-2023-2570.html
- https://errata.almalinux.org/8/ALSA-2024-0143.html
- https://access.redhat.com/security/cve/CVE-2020-17049
- https://access.redhat.com/errata/RHSA-2023:2570
- https://access.redhat.com/errata/RHSA-2024:0143
- http://www.openwall.com/lists/oss-security/2021/11/10/3
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-17049
- https://security.gentoo.org/glsa/202309-06