Improper Certificate Validation Affecting krb5-server-ldap package, versions <0:1.15.1-18.el7


Severity

Recommended
0.0
medium
0
10

Based on Red Hat Enterprise Linux security rating.

Threat Intelligence

EPSS
0.21% (60th percentile)

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  • Snyk IDSNYK-RHEL7-KRB5SERVERLDAP-4776246
  • published26 Jul 2021
  • disclosed25 Aug 2017

Introduced: 25 Aug 2017

CVE-2017-7562  (opens in a new tab)
CWE-295  (opens in a new tab)
CWE-287  (opens in a new tab)

How to fix?

Upgrade RHEL:7 krb5-server-ldap to version 0:1.15.1-18.el7 or higher.
This issue was patched in RHSA-2018:0666.

NVD Description

Note: Versions mentioned in the description apply only to the upstream krb5-server-ldap package and not the krb5-server-ldap package as distributed by RHEL. See How to fix? for RHEL:7 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