CVE-2023-34967
Description
A Type Confusion vulnerability was found in Samba's mdssvc RPC service for Spotlight. When parsing Spotlight mdssvc RPC packets, one encoded data structure is a key-value style dictionary where the keys are character strings, and the values can be any of the supported types in the mdssvc protocol. Due to a lack of type checking in callers of the dalloc_value_for_key() function, which returns the object associated with a key, a caller may trigger a crash in talloc_get_size() when talloc detects that the passed-in pointer is not a valid talloc pointer. With an RPC worker process shared among multiple client connections, a malicious client or attacker can trigger a process crash in a shared RPC mdssvc worker process, affecting all other clients this worker serves.
How to fix
- samba samba4.16.11, 4.17.10, 4.18.5 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| samba samba | v < 4.16.11, 4.17.0 ≤ v < 4.17.10, 4.18.0 ≤ v < 4.18.5 | 4.16.11, 4.17.10, 4.18.5 |
| fedoraproject fedora | 37, 38 | — |
| redhat enterprise_linux | 8.0, 9.0 | — |
| debian debian_linux | 11.0, 12.0 | — |
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