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Heap-based Buffer Overflow Affecting heimdal package, versions <1.7~git20150920+dfsg-4ubuntu1.16.04.1+esm3

0.0
medium

Snyk CVSS

    Attack Complexity Low
    Availability High

    Threat Intelligence

    EPSS 1% (84th percentile)
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NVD
6.5 medium
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Red Hat
5.9 medium
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SUSE
5.9 medium

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  • Snyk ID SNYK-UBUNTU1604-HEIMDAL-3087815
  • published 27 Oct 2022
  • disclosed 12 Jan 2023
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Introduced: 27 Oct 2022

CVE-2022-3437 Open this link in a new tab
CWE-122 Open this link 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.

A heap-based buffer overflow vulnerability was found in Samba within the GSSAPI unwrap_des() and unwrap_des3() routines of Heimdal. The DES and Triple-DES decryption routines in the Heimdal GSSAPI library allow a length-limited write buffer overflow on malloc() allocated memory when presented with a maliciously small packet. This flaw allows a remote user to send specially crafted malicious data to the application, possibly resulting in a denial of service (DoS) attack.