CVE-2021-37750

moderate-risk
Published 2021-08-23

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.

Do I need to act?

-
0.72% chance of exploitation
EPSS score — low exploit probability
-
Not on CISA KEV list
No confirmed active exploitation reported to CISA
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
6
CVSS 6.5/10 Medium
NETWORK / LOW complexity

Affected Products (5)

Affected Vendors

Debian Mit Oracle Fedoraproject Starwindsoftware

References (16)

Patch https://github.com/krb5/krb5/commit/d775c95af7606a51bf79547a94fa52ddd1cb7f49
Release Notes https://github.com/krb5/krb5/releases
Mailing List https://lists.debian.org/debian-lts-announce/2021/09/msg00019.html
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro...
Third Party Advisory https://security.netapp.com/advisory/ntap-20210923-0002/
Vendor Advisory https://web.mit.edu/kerberos/advisories/
Patch https://www.oracle.com/security-alerts/cpujul2022.html
Third Party Advisory https://www.starwindsoftware.com/security/sw-20220817-0004/
Patch https://github.com/krb5/krb5/commit/d775c95af7606a51bf79547a94fa52ddd1cb7f49
Release Notes https://github.com/krb5/krb5/releases
Mailing List https://lists.debian.org/debian-lts-announce/2021/09/msg00019.html
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro...
Third Party Advisory https://security.netapp.com/advisory/ntap-20210923-0002/
Vendor Advisory https://web.mit.edu/kerberos/advisories/
Patch https://www.oracle.com/security-alerts/cpujul2022.html
Third Party Advisory https://www.starwindsoftware.com/security/sw-20220817-0004/
38
/ 100
moderate-risk
Severity 24/34 · High
Exploitability 2/34 · Minimal
Exposure 12/34 · Low