CVE-2021-44758

HIGH
Published Dec 26, 20223y ago · Modified Jun 17, 20262w ago
7.5 CVSS 3.1
High
Find Similar
Published Dec 26, 2022 3y ago
Last Modified Jun 17, 2026 2w ago

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.

CVSS Details

Base Score
7.5
Exploitability
3.9
Impact
3.6
Vector string
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality None
Integrity None
Availability High

Threat Intelligence

No active exploitation signals — not in CISA KEV and no EPSS score yet.

Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 1

CWE-476 NULL Pointer Dereference Memory Safety

Affected Products 1

VendorProductVersionRange
heimdal_projectheimdal* <7.7.1

References 3

  • github.com https://github.com/heimdal/heimdal/commit/f9ec7002cdd526ae84fbacbf153162e118f22580
    PatchThird Party Advisory
  • github.com https://github.com/heimdal/heimdal/security/advisories/GHSA-69h9-669w-88xv
    Third Party Advisory
  • security.gentoo.org https://security.gentoo.org/glsa/202310-06

Remediation

  • github.com https://github.com/heimdal/heimdal/commit/f9ec7002cdd526ae84fbacbf153162e118f22580
    PatchThird Party Advisory