NULL Pointer Dereference Affecting krb5 package, versions <1.18.4-r0
Threat Intelligence
EPSS
1.2% (86th
percentile)
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Test your applications- Snyk ID SNYK-ALPINE317-KRB5-3140045
- published 26 Jul 2021
- disclosed 22 Jul 2021
Introduced: 22 Jul 2021
CVE-2021-36222 Open this link in a new tabHow to fix?
Upgrade Alpine:3.17 krb5 to version 1.18.4-r0 or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream krb5 package and not the krb5 package as distributed by Alpine.
See How to fix? for Alpine:3.17 relevant fixed versions and status.
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.
References
- https://github.com/krb5/krb5/commit/fc98f520caefff2e5ee9a0026fdf5109944b3562
- https://www.debian.org/security/2021/dsa-4944
- https://github.com/krb5/krb5/releases
- https://web.mit.edu/kerberos/advisories/
- https://www.oracle.com/security-alerts/cpuoct2021.html
- https://security.netapp.com/advisory/ntap-20211022-0003/
- https://security.netapp.com/advisory/ntap-20211104-0007/
CVSS Scores
version 3.1