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Heimdal Kerberos vulnerable to remotely triggered NULL pointer dereference

Vulnerability Note VU#730793

Original Release Date: 2022-10-07 | Last Revised: 2023-07-13

Overview

The Heimdal Software Kerberos 5 implementation is vulnerable to a null pointer dereferance. An attacker with network access to an application that depends on the vulnerable code path can cause the application to crash.

Description

CVE-2022-3116 A flawed logical condition in lib/gssapi/spnego/accept_sec_context.c allows a malicious actor to remotely trigger a NULL pointer dereference using a crafted negTokenInit token.

Impact

An attacker can use a specially crafted network packet to cause a vulnerable application to crash.

Solution

The latest version of code in the Heimdal master branch fixes the issue. However, the current stable release 7.7.0 does not include the fix.

Acknowledgements

Thanks to Internet Systems Consortium for reporting the vulnerability.

This document was written by Kevin Stephens.

Vendor Information

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Other Information

CVE IDs: CVE-2022-3116
API URL: VINCE JSON | CSAF
Date Public: 2022-10-07
Date First Published: 2022-10-07
Date Last Updated: 2023-07-13 17:43 UTC
Document Revision: 6

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