The unparse implementation in the Key Distribution Center (KDC) in MIT Kerberos 5 (aka krb5) 1.6.x through 1.9, when an LDAP backend is used, allows remote attackers to cause a denial of service (file descriptor exhaustion and daemon hang) via a principal name that triggers use of a backslash escape sequence, as demonstrated by a n sequence.
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Kerberos | Mit | 5-1.6.3 (including) | 5-1.6.3 (including) |
| Kerberos_5 | Mit | 1.6 (including) | 1.6 (including) |
| Kerberos_5 | Mit | 1.6.1 (including) | 1.6.1 (including) |
| Kerberos_5 | Mit | 1.6.2 (including) | 1.6.2 (including) |
| Kerberos_5 | Mit | 1.7 (including) | 1.7 (including) |
| Kerberos_5 | Mit | 1.7.1 (including) | 1.7.1 (including) |
| Kerberos_5 | Mit | 1.8 (including) | 1.8 (including) |
| Kerberos_5 | Mit | 1.8.1 (including) | 1.8.1 (including) |
| Kerberos_5 | Mit | 1.8.2 (including) | 1.8.2 (including) |
| Kerberos_5 | Mit | 1.8.3 (including) | 1.8.3 (including) |
| Kerberos_5 | Mit | 1.9 (including) | 1.9 (including) |