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


Severity

Recommended
0.0
medium
0
10

Based on Amazon Linux security rating.

Threat Intelligence

EPSS
3.18% (88th percentile)

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  • Snyk IDSNYK-AMZN201803-KRB5WORKSTATION-1712837
  • published27 Sept 2021
  • disclosed26 Jul 2018

Introduced: 26 Jul 2018

CVE-2017-7562  (opens in a new tab)
CWE-287  (opens in a new tab)

How to fix?

Upgrade Amazon-Linux:2018.03 krb5-workstation 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-workstation package and not the krb5-workstation 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.

CVSS Base Scores

version 3.1