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Insufficient Verification of Data Authenticity Affecting krb5-libs package, versions *

medium

Snyk CVSS

    Attack Complexity Low
    Privileges Required High
    Confidentiality High
    Integrity High
    Availability High

    Threat Intelligence

    EPSS 2.74% (91st percentile)
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NVD
6.6 medium
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Red Hat
7.2 high

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  • Snyk ID SNYK-CENTOS8-KRB5LIBS-1951412
  • published 23 Nov 2021
  • disclosed 10 Nov 2020
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Introduced: 10 Nov 2020

CVE-2020-17049 Open this link in a new tab
CWE-345 Open this link in a new tab

How to fix?

There is no fixed version for Centos:8 krb5-libs.

NVD Description

Note: Versions mentioned in the description apply only to the upstream krb5-libs package and not the krb5-libs package as distributed by Centos. See How to fix? for Centos:8 relevant fixed versions and status.

<p>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).</p> <p>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.</p> <p>The update addresses this vulnerability by changing how the KDC validates service tickets used with KCD.</p>