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.
Workaround:
The product allocates or initializes a resource such as a pointer, object, or variable using one type, but it later accesses that resource using a type that is incompatible with the original type.
| Link | Tags |
|---|---|
| https://access.redhat.com/errata/RHSA-2023:6667 | third party advisory vendor advisory |
| https://access.redhat.com/errata/RHSA-2023:7139 | third party advisory vendor advisory |
| https://access.redhat.com/errata/RHSA-2024:0423 | vendor advisory |
| https://access.redhat.com/errata/RHSA-2024:0580 | vendor advisory |
| https://access.redhat.com/security/cve/CVE-2023-34967 | third party advisory vdb entry |
| https://bugzilla.redhat.com/show_bug.cgi?id=2222794 | issue tracking |
| https://www.samba.org/samba/security/CVE-2023-34967.html | vendor advisory |
| https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/BPCSGND7LO467AJGR5DYBGZLTCGTOBCC/ | |
| https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/OT74M42E6C36W7PQVY3OS4ZM7DVYB64Z/ | |
| https://security.netapp.com/advisory/ntap-20230731-0010/ | |
| https://www.debian.org/security/2023/dsa-5477 |