VU#730793: Heimdal Kerbos vulnerable to remotely triggered NULL pointer dereference

VU#730793: Heimdal Kerbos vulnerable to remotely triggered NULL pointer dereference

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

A flawed logical condition 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 the International Continence Society for reporting this issue.

This document was written by Kevin Stephens.

Vendor Information

One or more vendors are listed for this advisory. Please reference the full report for more information.

Other Information

CVE IDs:

CVE-2022-3116

Date Public:

2022-10-07
Date First Published:
2022-10-07
Date Last Updated:
2022-10-07 19:24 UTC
Document Revision:
1

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