The prep_reprocess_req function in do_tgs_req.c in the Key Distribution Center (KDC) in MIT Kerberos 5 (aka krb5) before 1.10.5 does not properly perform service-principal realm referral, which allows remote authenticated users to cause a denial of service (NULL pointer dereference and daemon crash) via a crafted TGS-REQ 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 | * | 1.10.5 (excluding) |
| Red Hat Enterprise Linux 6 | RedHat | krb5-0:1.10.3-10.el6_4.2 | * |
| Krb5 | Ubuntu | lucid | * |
| Krb5 | Ubuntu | oneiric | * |
| Krb5 | Ubuntu | precise | * |
| Krb5 | Ubuntu | quantal | * |
| Krb5 | Ubuntu | raring | * |
| Krb5 | Ubuntu | upstream | * |