CVE-2023-34966
Publication date 19 July 2023
Last updated 30 June 2025
Ubuntu priority
Description
An infinite loop vulnerability was found in Samba's mdssvc RPC service for Spotlight. When parsing Spotlight mdssvc RPC packets sent by the client, the core unmarshalling function sl_unpack_loop() did not validate a field in the network packet that contains the count of elements in an array-like structure. By passing 0 as the count value, the attacked function will run in an endless loop consuming 100% CPU. This flaw allows an attacker to issue a malformed RPC request, triggering an infinite loop, resulting in a denial of service condition.
Status
| Package | Ubuntu Release | Status |
|---|---|---|
| samba | ||
| 24.04 LTS noble |
Fixed in 2:4.18.5+dfsg-1ubuntu1
|
|
| 22.04 LTS jammy |
Fixed in 2:4.15.13+dfsg-0ubuntu1.2
|
|
| 20.04 LTS focal |
Fixed in 2:4.15.13+dfsg-0ubuntu0.20.04.3
|
|
| 18.04 LTS bionic |
Fixed in 2:4.7.6+dfsg~ubuntu-0ubuntu2.29+esm1
|
|
| 16.04 LTS xenial |
Fixed in 2:4.3.11+dfsg-0ubuntu0.16.04.34+esm2
|
|
| 14.04 LTS trusty |
Fixed in 2:4.3.11+dfsg-0ubuntu0.14.04.20+esm13
|
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CVSS version: CVSS v3.0
Base score
7.5 · High
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
References
Related Ubuntu Security Notices (USN)
- USN-6238-1
- Samba vulnerabilities
- 19 July 2023
- USN-7582-1
- Samba vulnerabilities
- 19 June 2025