01 Record

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 dereference in kdc/do_tgs_req.c via a FAST inner body that lacks a server

UnratedPUBLISHEDCNA: mitre

CNA base scoreUnratedNo CNA CVSS vector

View raw JSON

02 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

03 Exploitation and scoring

Exploitation: Not assessed. CISA has not published an exploitation assessment for this record, and it is not in the KEV catalog. That is an absence of assessment, not a finding of no risk.
SSVC decision: Not assessed by CISA
EPSS probability: 2.17% probability of exploitation activity in the next 30 days.
EPSS percentile: Ranks above 80.7% of scored records. A rank, not a probability.
NVD base score: 6.5 (CVSS v3.x), scored by the NVD independently of the CNA.
NVD CVSS vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
NVD analysis status: Modified. NVD last modified this record on 2026-06-17.
Red Hat severity: Moderate. Red Hat's rating for its own products, not a CVSS rating.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

04 Metadata

Published

2021-08-23 00:00Z5 YR AGO

Last updated

2024-08-04 01:30Z2 YR AGO

Reserved

2021-07-30

Assigning CNA

mitre

Record state

PUBLISHED

Severity

Not rated by the issuing CNA

CNA CVSS vector

Not published by the issuing CNA

Weaknesses

CWE-476NULL Pointer DereferenceBase

Data version

5.1

Document digest

e9d8a97b9dde20f5686dc11bdad44991573db5be0d9da1cff7178e2d3c72264d

05 Affected products

VendorProductVersionsPlatforms

debiandebian_linuxNot specified—

fedoraprojectfedoraNot specified—

mitkerberos_5Not specified—

oraclecommunications_cloud_native_core_network_slice_selection_functionNot specified—

redhatenterprise_linuxNot specified—

redhatjboss_core_servicesNot specified—

redhatjboss_enterprise_application_platformNot specified—

starwindsoftwarestarwind_virtual_sanNot specified—

06 References

web.mit.eduhttps://web.mit.edu/kerberos/advisories/
github.comhttps://github.com/krb5/krb5/releases
lists.fedoraproject.orgFEDORA-2021-f2c8514f02https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/MFCLW7D46E4VCREKKH453T5DA4XOLHU2/vendor-advisory
lists.debian.org[debian-lts-announce] 20210930 [SECURITY] [DLA 2771-1] krb5 security updatehttps://lists.debian.org/debian-lts-announce/2021/09/msg00019.htmlmailing-list
www.oracle.comhttps://www.oracle.com/security-alerts/cpujul2022.html
github.comhttps://github.com/krb5/krb5/commit/d775c95af7606a51bf79547a94fa52ddd1cb7f49
security.netapp.comhttps://security.netapp.com/advisory/ntap-20210923-0002/
www.starwindsoftware.comhttps://www.starwindsoftware.com/security/sw-20220817-0004/

01 Record index

CVE-2021-37750

02 Description

03 Exploitation and scoring

04 Metadata

05 Affected products

06 References

02 Records

CVE-2021-37750

02 Description

03 Exploitation and scoring

04 Metadata

05 Affected products

06 References