CVE-2021-36222

moderate-risk
Published 2021-07-22

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.

Do I need to act?

~
6.6% chance of exploitation in next 30 days
EPSS score — moderate 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
7
CVSS 7.5/10 High
NETWORK / LOW complexity

Affected Products (8)

Affected Vendors

Debian Mit Oracle Netapp

References (14)

Patch https://github.com/krb5/krb5/commit/fc98f520caefff2e5ee9a0026fdf5109944b3562
Release Notes https://github.com/krb5/krb5/releases
Third Party Advisory https://security.netapp.com/advisory/ntap-20211022-0003/
Third Party Advisory https://security.netapp.com/advisory/ntap-20211104-0007/
Not Applicable https://web.mit.edu/kerberos/advisories/
Third Party Advisory https://www.debian.org/security/2021/dsa-4944
Patch https://www.oracle.com/security-alerts/cpuoct2021.html
Patch https://github.com/krb5/krb5/commit/fc98f520caefff2e5ee9a0026fdf5109944b3562
Release Notes https://github.com/krb5/krb5/releases
Third Party Advisory https://security.netapp.com/advisory/ntap-20211022-0003/
Third Party Advisory https://security.netapp.com/advisory/ntap-20211104-0007/
Not Applicable https://web.mit.edu/kerberos/advisories/
Third Party Advisory https://www.debian.org/security/2021/dsa-4944
Patch https://www.oracle.com/security-alerts/cpuoct2021.html
49
/ 100
moderate-risk
Severity 26/34 · High
Exploitability 9/34 · Low
Exposure 14/34 · Moderate