CVE-2023-34966

Publication date 19 July 2023

Last updated 30 June 2025

Ubuntu priority

Medium

Why this priority?

Cvss 3 Severity Score

7.5 · High

Score breakdown

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 25.04 plucky
Fixed 2:4.18.5+dfsg-1ubuntu1
24.10 oracular
Fixed 2:4.18.5+dfsg-1ubuntu1
24.04 LTS noble
Fixed 2:4.18.5+dfsg-1ubuntu1
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
Fixed 2:4.7.6+dfsg~ubuntu-0ubuntu2.29+esm1
16.04 LTS xenial
Fixed 2:4.3.11+dfsg-0ubuntu0.16.04.34+esm2
14.04 LTS trusty
Fixed 2:4.3.11+dfsg-0ubuntu0.14.04.20+esm13

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Severity score breakdown

Parameter Value
Base score 7.5 · High
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Scope Unchanged
Confidentiality None
Integrity impact None
Availability impact 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)

Other references