bitcoind and Bitcoin-Qt 0.8.x before 0.8.1 do not enforce a certain block protocol rule, which allows remote attackers to bypass intended access restrictions and conduct double-spending attacks via a large block that triggers incorrect Berkeley DB locking in older product versions.
| Software | From | Fixed in |
|---|---|---|
| bitcoin / bitcoin_core | 0.8.0 | 0.8.0.x |
| bitcoin / bitcoin_core | 0.8.0-rc1 | 0.8.0-rc1.x |