An infinite loop vulnerability was found in Sambas mdssvc RPC service for Spotlight. When parsing Spotlight mdssvc RPC packets sent by the client, the core unmarshalling function sl_unpack_loop() did not validate a field in the network packet that contains the count of elements in an array-like structure. By passing 0 as the count value, the attacked function will run in an endless loop consuming 100% CPU. This flaw allows an attacker to issue a malformed RPC request, triggering an infinite loop, resulting in a denial of service condition.
The product contains an iteration or loop with an exit condition that cannot be reached, i.e., an infinite loop.
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Samba | Samba | * | 4.16.11 (excluding) |
| Samba | Samba | 4.17.0 (including) | 4.17.10 (excluding) |
| Samba | Samba | 4.18.0 (including) | 4.18.5 (excluding) |