Reachable Assertion Affecting krb5 package, versions <1.15.4-r0


Severity

0.0
medium
0
10

    Threat Intelligence

    EPSS
    0.31% (70th percentile)

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  • Snyk ID SNYK-ALPINE310-KRB5-454714
  • published 26 Dec 2018
  • disclosed 26 Dec 2018

How to fix?

Upgrade Alpine:3.10 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:3.10 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
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Snyk

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

5.3 medium
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Red Hat

5.3 medium