Home/CVE/The Key Distribution Center (KDC) in MIT Kerberos 5 (aka krb5) before 1.18.5 and 1.19.x before 1.19.3 has a NULL pointer
CVE

CVE-2021-37750

The Key Distribution Center (KDC) in MIT Kerberos 5 (aka krb5) before 1.18.5 and 1.19.x before 1.19.3 has a NULL pointer

The Key Distribution Center (KDC) in MIT Kerberos 5 (aka krb5) before 1.18.5 and 1.19.x before 1.19.3 has a NULL pointer dereference in kdc/do_tgs_req.c via a FAST inner body that lacks a server field.

MEDIUM · CVSS 6.5 EPSS 0.00716
Monitor
  • No active-exploitation, high-EPSS, or public-exploit signals - routine patching cadence
Sigma rules0 YARA rules0
⬡

Weakness Classification

CWE-476NULL Pointer Dereference
▤

Affected Products & Versions

6
mit kerberos 5< 1.18.5
mit kerberos 5>= 1.19.0 and < 1.19.3
fedoraproject fedoraall versions
debian linuxall versions
starwindsoftware starwind virtual sanall versions
oracle communications cloud native core network slice selection functionall versions
▣

Scoring & Timeline

6.5
MEDIUM · 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 NVD23 Aug 2021 · 05:15 AM
CVSS VectorCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
⚑

Vendor Advisories

14
suse-csafopenSUSE-SU-2024:10899-1
suse-csafSUSE-SU-2024:1702-1
siemens-csafSSA-398330
usnUSN-5959-1
suse-csafSUSE-SU-2022:4154-1
🔗

References & Sources

8
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/d775c95af7606a51bf79547a94fa52ddd1cb7f49PatchThird Party Advisory
https://github.com/krb5/krb5/releasesRelease NotesThird Party Advisory
https://lists.debian.org/debian-lts-announce/2021/09/msg00019.htmlMailing ListThird Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/MFCLW7D46E4VCREKKH453T5DA4XOLHU2/
https://security.netapp.com/advisory/ntap-20210923-0002/Third Party Advisory
https://web.mit.edu/kerberos/advisories/Vendor Advisory
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