Home/CVE/ec_verify in kdc/kdc_preauth_ec.c in the Key Distribution Center (KDC) in MIT Kerberos 5 (aka krb5) before 1.18.4 and 1.
CVE

CVE-2021-36222

ec_verify in kdc/kdc_preauth_ec.c in the Key Distribution Center (KDC) in MIT Kerberos 5 (aka krb5) before 1.18.4 and 1.

ec_verify in kdc/kdc_preauth_ec.c in the Key Distribution Center (KDC) in MIT Kerberos 5 (aka krb5) before 1.18.4 and 1.19.x before 1.19.2 allows remote attackers to cause a NULL pointer dereference and daemon crash. This occurs because a return value is not properly managed in a certain situation.

HIGH · CVSS 7.5 EPSS 0.06615
Schedule remediation
  • EPSS percentile: top 9% of all CVEs by exploitation likelihood
  • CVSS base score ≥ 7.0
Sigma rules0 YARA rules0
⬡

Weakness Classification

CWE-476NULL Pointer Dereference
▤

Affected Products & Versions

8
mit kerberos 5< 1.18.4
mit kerberos 5>= 1.19.0 and < 1.19.2
debian linuxall versions
netapp active iq unified managerall versions
netapp oncommand insightall versions
netapp oncommand workflow automationall versions
netapp snapcenterall versions
oracle mysql server>= 8.0.0 and <= 8.0.26
▣

Scoring & Timeline

7.5
HIGH · CVSS v3.1 · cve@mitre.org
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD22 Jul 2021 · 06:15 PM
CVSS VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
⚑

Vendor Advisories

22
suse-csafopenSUSE-SU-2024:10899-1
suse-csafopenSUSE-SU-2024:11816-1
suse-csafSUSE-SU-2024:0191-1
suse-csafSUSE-SU-2024:0196-1
siemens-csafSSA-398330
🔗

References & Sources

7
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
https://github.com/krb5/krb5/commit/fc98f520caefff2e5ee9a0026fdf5109944b3562PatchThird Party Advisory
https://github.com/krb5/krb5/releasesRelease NotesThird Party Advisory
https://security.netapp.com/advisory/ntap-20211022-0003/Third Party Advisory
https://security.netapp.com/advisory/ntap-20211104-0007/Third Party Advisory
https://web.mit.edu/kerberos/advisories/Not Applicable
https://www.debian.org/security/2021/dsa-4944Third Party Advisory
Intelligence Graph · click any node to traverse
CVETechnique ActorTool Family
drag to reposition · click any node to traverse · button top-right enlarges
External lookups - second-class, for what we don’t hold ourselves
NVDCVE.orgCISAVulnersExploit-DBGitHub PoCVulnCheck KEVGreyNoise
Vulnerabilities
CISA KEV catalog
CWE weaknesses
CAPEC attack patterns
Package vulnerabilities
Threat intelligence
Threat actors
Tools & malware
ATT&CK techniques
IOCs
Detection & defense
Sigma rules
YARA rules
Atomic Red Team tests
D3FEND countermeasures
Compliance
NIST 800-53
ISO 27001:2022
SOC 2 TSC
PCI-DSS v4.0
CIS Controls v8.1
About
All capabilities
Live statistics
Data sources
Privacy policy
Terms of service
threatengine.sh  ·  Open-source threat intelligence platform  ·  100+ authoritative sources  ·  Every fact traces to its origin