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CVE-2018-20217

CVE-2018-20217

This page contains facts from public vulnerability sources. Check the original advisory before updating.

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 5.3 · Medium · EPSS 1.4% · Fix available

Published
Updated

Stack: system

Affected products and versions

  • n/a

    Versions
    • n/a: Affected

    No fix published

  • krb5 Debian:12

    Affected ranges
    • ECOSYSTEM: < 1.16.2-1

    Update to 1.16.2-1

  • krb5 Debian:13

    Affected ranges
    • ECOSYSTEM: < 1.16.2-1

    Update to 1.16.2-1

  • krb5 Debian:14

    Affected ranges
    • ECOSYSTEM: < 1.16.2-1

    Update to 1.16.2-1

  • krb5 Ubuntu:Pro:14.04:LTS

    Versions
    • 1.10.1+dfsg-6.1ubuntu1
    • 1.11.3+dfsg-3ubuntu2
    • 1.12+dfsg-2ubuntu1
    • 1.12+dfsg-2ubuntu2
    • 1.12+dfsg-2ubuntu3
    • 1.12+dfsg-2ubuntu4
    • 1.12+dfsg-2ubuntu4.2
    • 1.12+dfsg-2ubuntu5
    • 1.12+dfsg-2ubuntu5.1
    • 1.12+dfsg-2ubuntu5.2
    • 1.12+dfsg-2ubuntu5.3
    • 1.12+dfsg-2ubuntu5.4
    Affected ranges
    • ECOSYSTEM: < 1.12+dfsg-2ubuntu5.4+esm1

    Update to 1.12+dfsg-2ubuntu5.4+esm1

  • krb5 Ubuntu:Pro:16.04:LTS

    Versions
    • 1.13.2+dfsg-2
    • 1.13.2+dfsg-3
    • 1.13.2+dfsg-4
    • 1.13.2+dfsg-5
    • 1.13.2+dfsg-5ubuntu1
    • 1.13.2+dfsg-5ubuntu2
    • 1.13.2+dfsg-5ubuntu2.1
    • 1.13.2+dfsg-5ubuntu2.1+esm1
    • 1.13.2+dfsg-5ubuntu2.2
    Affected ranges
    • ECOSYSTEM: < 1.13.2+dfsg-5ubuntu2.2+esm3

    Update to 1.13.2+dfsg-5ubuntu2.2+esm3

  • krb5 Ubuntu:18.04:LTS

    Versions
    • 1.15.1-2
    • 1.16-2
    • 1.16-2build1
    • 1.16-2ubuntu0.1
    • 1.16-2ubuntu0.2
    Affected ranges
    • ECOSYSTEM: < 1.16-2ubuntu0.3

    Update to 1.16-2ubuntu0.3

Original sources

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