NULL Pointer Dereference Affecting heimdal package, versions <1.7~git20150920+dfsg-4ubuntu1.16.04.1+esm1


Severity

Recommended
low

Based on Ubuntu security rating.

Threat Intelligence

EPSS
0.26% (66th percentile)

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  • Snyk IDSNYK-UBUNTU1604-HEIMDAL-1766746
  • published23 Oct 2021
  • disclosed12 Oct 2021

Introduced: 12 Oct 2021

CVE-2021-3671  (opens in a new tab)
CWE-476  (opens in a new tab)

How to fix?

Upgrade Ubuntu:16.04 heimdal to version 1.7~git20150920+dfsg-4ubuntu1.16.04.1+esm1 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:16.04 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.

CVSS Scores

version 3.1