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Improper Authentication Affecting krb5-libs package, versions <0:1.15.1-19.43.amzn1

0.0
medium

Snyk CVSS

    Attack Complexity Low
    Integrity High

    Threat Intelligence

    EPSS 0.21% (59th percentile)
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NVD
6.5 medium
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Red Hat
6.5 medium

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  • Snyk ID SNYK-AMZN201803-KRB5LIBS-1712914
  • published 27 Sep 2021
  • disclosed 26 Jul 2018
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Introduced: 26 Jul 2018

CVE-2017-7562 Open this link in a new tab
CWE-287 Open this link in a new tab

How to fix?

Upgrade Amazon-Linux:2018.03 krb5-libs to version 0:1.15.1-19.43.amzn1 or higher.
This issue was patched in ALAS-2018-1010.

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 Amazon-Linux. See How to fix? for Amazon-Linux:2018.03 relevant fixed versions and status.

An authentication bypass flaw was found in the way krb5's certauth interface before 1.16.1 handled the validation of client certificates. A remote attacker able to communicate with the KDC could potentially use this flaw to impersonate arbitrary principals under rare and erroneous circumstances.