CVE-2023-34967

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.

Bugs

• <https://bugzilla.samba.org/show_bug.cgi?id=15341&gt;

Notes