CVE-2023-34967

Publication date 19 July 2023

Last updated 26 August 2025

Ubuntu priority

Medium

Why this priority?

Cvss 3 Severity Score

5.3 · Medium

Score breakdown

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.

Read the notes from the security team

Status

Package Ubuntu Release Status
samba 23.10 mantic
Fixed 2:4.18.5+dfsg-1ubuntu1
23.04 lunar
Fixed 2:4.17.7+dfsg-1ubuntu1.1
22.10 kinetic
Fixed 2:4.16.8+dfsg-0ubuntu1.2
22.04 LTS jammy
Fixed 2:4.15.13+dfsg-0ubuntu1.2
20.04 LTS focal
Fixed 2:4.15.13+dfsg-0ubuntu0.20.04.3
18.04 LTS bionic
Not affected
16.04 LTS xenial
Not affected
14.04 LTS trusty
Not affected

Notes

sbeattie

Spotlight functionality first enabled in 4.13.x in Ubuntu (so focal), in older releases the Spotlight service is not built.

Severity score breakdown

Parameter Value
Base score 5.3 · Medium
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

References

Related Ubuntu Security Notices (USN)

Other references