The pkinit_server_return_padata function in plugins/preauth/pkinit/pkinit_srv.c in the PKINIT implementation in the Key Distribution Center (KDC) in MIT Kerberos 5 (aka krb5) before 1.10.4 attempts to find an agility KDF identifier in inappropriate circumstances, which allows remote attackers to cause a denial of service (NULL pointer dereference and daemon crash) via a crafted Draft 9 request.
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 | * | 1.10.4 (excluding) |
| Red Hat Enterprise Linux 6 | RedHat | krb5-0:1.10.3-10.el6_4.1 | * |
| Krb5 | Ubuntu | hardy | * |
| Krb5 | Ubuntu | oneiric | * |
| Krb5 | Ubuntu | precise | * |
| Krb5 | Ubuntu | quantal | * |
| Krb5 | Ubuntu | upstream | * |