Reachable Assertion Affecting krb5 package, versions <1.15.4-r0


Severity

Recommended
0.0
medium
0
10

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Threat Intelligence

EPSS
0.24% (63rd percentile)

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  • Snyk IDSNYK-ALPINE318-KRB5-5512693
  • published26 Dec 2018
  • disclosed26 Dec 2018

Introduced: 26 Dec 2018

CVE-2018-20217  (opens in a new tab)
CWE-617  (opens in a new tab)

How to fix?

Upgrade Alpine:3.18 krb5 to version 1.15.4-r0 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream krb5 package and not the krb5 package as distributed by Alpine. See How to fix? for Alpine:3.18 relevant fixed versions and status.

A Reachable Assertion issue was discovered in the KDC in MIT Kerberos 5 (aka krb5) before 1.17. If an attacker can obtain a krbtgt ticket using an older encryption type (single-DES, triple-DES, or RC4), the attacker can crash the KDC by making an S4U2Self request.

CVSS Scores

version 3.1