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Improper Authentication Affecting krb5-libs package, versions <0:1.15.1-19.amzn2.0.1

Severity

 Recommended
0.0
medium
0
10

Based on Amazon Linux security rating

    Threat Intelligence

    EPSS
    0.21% (59th percentile)

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  • Snyk ID SNYK-AMZN2-KRB5LIBS-1662531
  • 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:2 krb5-libs to version 0:1.15.1-19.amzn2.0.1 or higher.
This issue was patched in ALAS2-2018-1010.

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:2 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 Scores

version 3.1
Expand this section

NVD

6.5 medium
  • Attack Vector (AV)
    Network
  • Attack Complexity (AC)
    Low
  • Privileges Required (PR)
    Low
  • User Interaction (UI)
    None
  • Scope (S)
    Unchanged
  • Confidentiality (C)
    None
  • Integrity (I)
    High
  • Availability (A)
    None