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.
A NULL pointer dereference occurs when the application dereferences a pointer that it expects to be valid, but is NULL, typically causing a crash or exit.
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Kerberos_5 | Mit | * | 1.18.4 (excluding) |
| Kerberos_5 | Mit | 1.19.0 (including) | 1.19.2 (excluding) |
| Red Hat Enterprise Linux 8 | RedHat | krb5-0:1.18.2-8.3.el8_4 | * |
| Krb5 | Ubuntu | bionic | * |
| Krb5 | Ubuntu | esm-apps/bionic | * |
| Krb5 | Ubuntu | focal | * |
| Krb5 | Ubuntu | hirsute | * |
| Krb5 | Ubuntu | trusty | * |
| Krb5 | Ubuntu | upstream | * |
| Krb5 | Ubuntu | xenial | * |