High severity · published Dec 26, 2022
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…
7.5
CVSS
1.3%
EPSS
No
On KEV
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 vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)1.3% · higher than 71% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
HE
Heimdal · Heimdal Project
before 7.7.1 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-44758
CVE.org
https://www.cve.org/CVERecord?id=CVE-2021-44758
Patch
https://github.com/heimdal/heimdal/commit/f9ec7002cdd526ae84fbacbf153162e118f22580
Third Party Advisory
https://github.com/heimdal/heimdal/security/advisories/GHSA-69h9-669w-88xv
security.gentoo.org
https://security.gentoo.org/glsa/202310-06
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