CVE-2021-37750
MEDIUM
6.5
CVSS Score
Published: August 23, 2021 at 12:00 AM UTC
Updated: October 14, 2026 at 12:17 PM UTC
5 products affected across 5 vendorsDebian LinuxFedoraKerberos 5
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Severity
MEDIUM6.5
Exploit prediction
EPSS 3%
Description
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.
Affected
Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.
Debian Linux· Debiandrupal
95%95%
v < 1.18.51.19.0 ≤ v < 1.19.3
Affected range stops below 1.18.5, so it looks safe — our inference, not a vendor statement
Affected range stops below 1.19.3, so it looks safe — our inference, not a vendor statement
Remediation
No guide yetNo remediation guidance has been written for this CVE yet. What the record does show:
Patch and advisory references
- https://github.com/krb5/krb5/commit/d775c95af7606a51bf79547a94fa52ddd1cb7f49
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/MFCLW7D46E4VCREKKH453T5DA4XOLHU2/
- https://web.mit.edu/kerberos/advisories/
- https://www.oracle.com/security-alerts/cpujul2022.html
References (9)
PatchThird Party Advisory
Source: [email protected]
https://github.com/krb5/krb5/commit/d775c95af7606a51bf79547a94fa52ddd1cb7f49Mailing ListThird Party Advisory
Source: [email protected]
https://lists.debian.org/debian-lts-announce/2021/09/msg00019.htmlThird Party Advisory
Source: [email protected]
https://security.netapp.com/advisory/ntap-20210923-0002/x_refsource_MISCPatchThird Party Advisory
Source: [email protected]
https://www.oracle.com/security-alerts/cpujul2022.htmlThird Party Advisory
Source: [email protected]
https://www.starwindsoftware.com/security/sw-20220817-0004/CVSS
- Attack Vector
- NETWORK
- Complexity
- LOW
- Privileges
- LOW
- User Interaction
- NONE
- Scope
- UNCHANGED
- Confidentiality
- NONE
- Integrity
- NONE
- Availability
- HIGH
Vector?
Quick Info
StatusMODIFIED
CWE
CWE-476
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