CVE-2021-44758
HIGHCVSS 7.5/10EPSS 1.22%
Last modified
CVE-2021-44758 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. 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.. EPSS estimates a 1.22% chance of exploitation in the next 30 days.
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.
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Heimdal Project | Heimdal | < 7.7.1 |
References
- https://github.com/heimdal/heimdal/commit/f9ec7002cdd526ae84fbacbf153162e118f22580Patch, Third Party Advisory
- https://github.com/heimdal/heimdal/security/advisories/GHSA-69h9-669w-88xvThird Party Advisory
- https://github.com/heimdal/heimdal/commit/f9ec7002cdd526ae84fbacbf153162e118f22580Patch, Third Party Advisory
- https://github.com/heimdal/heimdal/security/advisories/GHSA-69h9-669w-88xvThird Party Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2021-44758?
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.
How severe is CVE-2021-44758?
CVE-2021-44758 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 1.22% probability of exploitation in the next 30 days.
How do I fix CVE-2021-44758?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
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Are you affected by CVE-2021-44758?
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Scan your code nowSource: NVD / NIST