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›vulnerability›CVE-2021-36222
Name
CVE-2021-36222
Source
NVD ( link)Debian ( link)
Description
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.
CWEs
CWE-476
Published Date
Updated Date
Workaround
-
Advisories
https://github.com/krb5/krb5/commit/fc98f520caefff2e5ee9a0026fdf5109944b3562Patch
https://github.com/krb5/krb5/releasesRelease Notes
https://security.netapp.com/advisory/ntap-20211022-0003/Third Party Advisory
https://security.netapp.com/advisory/ntap-20211104-0007/Third Party Advisory
https://web.mit.edu/kerberos/advisories/Not Applicable
https://www.debian.org/security/2021/dsa-4944Third Party Advisory
https://www.oracle.com/security-alerts/cpuoct2021.htmlPatch
https://github.com/krb5/krb5/commit/fc98f520caefff2e5ee9a0026fdf5109944b3562Patch
https://github.com/krb5/krb5/releasesRelease Notes
https://security.netapp.com/advisory/ntap-20211022-0003/Third Party Advisory
https://security.netapp.com/advisory/ntap-20211104-0007/Third Party Advisory
https://web.mit.edu/kerberos/advisories/Not Applicable
https://www.debian.org/security/2021/dsa-4944Third Party Advisory
https://www.oracle.com/security-alerts/cpuoct2021.htmlPatch

Analysis#

Affected Component
Analysis
krb5
Patched

Vulnerability Ratings#

7.5
CVSSv31
5
CVSSv2

Others affected components#

Name
Project
Project Version
Version
Status
libkrb5
buildroot
2025.02.x
1.21.3
Not Affected
libkrb5
buildroot
master
1.22.2
Not Affected
krb5
openwrt
master
1.22.2-r1
Not Affected
krb5
openwrt
openwrt-25.12
1.22.1-r1
Not Affected
krb5
yocto
master
1.22.2
Not Affected
krb5
yocto
scarthgap
1.21.3
Not Affected

Resolved with patches#

krb5 (yocto:kirkstone)

#
Title
Author
Resolve
1
Fix KDC null deref on bad encrypted challenge
Joseph Sutton <josephsutton@catalyst.net.nz>
CVE-2021-36222