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NULL Pointer Dereference Affecting heimdal package, versions <7.5.0+dfsg-1ubuntu0.1

low

Snyk CVSS

    Attack Complexity Low
    Availability High

    Threat Intelligence

    EPSS 0.53% (77th percentile)
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NVD
6.5 medium
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Red Hat
6.5 medium

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  • Snyk ID SNYK-UBUNTU1804-HEIMDAL-1766740
  • published 23 Oct 2021
  • disclosed 12 Oct 2021
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Introduced: 12 Oct 2021

CVE-2021-3671 Open this link in a new tab
CWE-476 Open this link in a new tab

How to fix?

Upgrade Ubuntu:18.04 heimdal to version 7.5.0+dfsg-1ubuntu0.1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream heimdal package and not the heimdal package as distributed by Ubuntu. See How to fix? for Ubuntu:18.04 relevant fixed versions and status.

A null pointer de-reference was found in the way samba kerberos server handled missing sname in TGS-REQ (Ticket Granting Server - Request). An authenticated user could use this flaw to crash the samba server.