NULL Pointer Dereference Affecting heimdal package, versions <1.7~git20150920+dfsg-4ubuntu1.16.04.1+esm3


Severity

Recommended
medium

Based on Ubuntu security rating.

Threat Intelligence

EPSS
0.12% (47th percentile)

Do your applications use this vulnerable package?

In a few clicks we can analyze your entire application and see what components are vulnerable in your application, and suggest you quick fixes.

Test your applications

Snyk Learn

Learn about NULL Pointer Dereference vulnerabilities in an interactive lesson.

Start learning
  • Snyk IDSNYK-UBUNTU1604-HEIMDAL-3120976
  • published16 Nov 2022
  • disclosed26 Dec 2022

Introduced: 16 Nov 2022

CVE-2021-44758  (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+esm3 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.

Heimdal before 7.7.1 allows attackers to cause a NULL pointer dereference in a SPNEGO acceptor via a preferred_mech_type of GSS_C_NO_OID and a nonzero initial_response value to send_accept.

CVSS Scores

version 3.1