CVE-2023-34967
Published: 19 July 2023
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.
Notes
| Author | Note |
|---|---|
| sbeattie | Spotlight functionality first enabled in 4.13.x in Ubuntu (so focal), in older releases the Spotlight service is not built. |
Priority
Status
| Package | Release | Status |
|---|---|---|
|
samba Launchpad, Ubuntu, Debian |
trusty |
Not vulnerable
(code not build)
|
| xenial |
Not vulnerable
(code not build)
|
|
| bionic |
Not vulnerable
(code not build)
|
|
| focal |
Released
(2:4.15.13+dfsg-0ubuntu0.20.04.3)
|
|
| jammy |
Released
(2:4.15.13+dfsg-0ubuntu1.2)
|
|
| kinetic |
Released
(2:4.16.8+dfsg-0ubuntu1.2)
|
|
| lunar |
Released
(2:4.17.7+dfsg-1ubuntu1.1)
|
|
| upstream |
Needs triage
|
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score | 5.3 |
| Attack vector | Network |
| Attack complexity | Low |
| Privileges required | None |
| User interaction | None |
| Scope | Unchanged |
| Confidentiality | None |
| Integrity impact | None |
| Availability impact | Low |
| Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L |