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CVE-2021-44758

7.5 · HIGH

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.

Published Dec 26, 2022CWE-476EPSS 1.28%

Overview

CVE-2021-44758 is a high-severity vulnerability. It was published on December 26, 2022 and has a CVSS 3.1 base score of 7.5 (HIGH).

This vulnerability has a CVSS 3.1 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

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.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

GitHubgithub.com/heimdal/heimdal/commit/f9ec7002cdd526ae84fbacbf153162e118f22580GitHubgithub.com/heimdal/heimdal/security/advisories/GHSA-69h9-669w-88xvRefsecurity.gentoo.org/glsa/202310-06GitHubgithub.com/heimdal/heimdal/commit/f9ec7002cdd526ae84fbacbf153162e118f22580GitHubgithub.com/heimdal/heimdal/security/advisories/GHSA-69h9-669w-88xvRefsecurity.gentoo.org/glsa/202310-06

How CyberStrike helps

Frequently asked questions

What is CVE-2021-44758?

CVE-2021-44758 is a high-severity vulnerability. It was published on December 26, 2022 and has a CVSS 3.1 base score of 7.5 (HIGH).

How severe is CVE-2021-44758?

This vulnerability has a CVSS 3.1 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2021-44758?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2021-44758?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2021-44758 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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