CVE-2023-34966

Published: Jul 20, 2023

Modified: Nov 20, 2025

PUBLISHED

CVSS v3.1

7.5

HIGH

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.

Vendor	Product	Versions
Red Hat	Red Hat Enterprise Linux 8	unaffected `0:4.18.6-1.el8 - < *`
Red Hat	Red Hat Enterprise Linux 8	unaffected `0:4.18.6-1.el8 - < *`
Red Hat	Red Hat Enterprise Linux 8.6 Extended Update Support	unaffected `0:4.15.5-15.el8_6 - < *`
Red Hat	Red Hat Enterprise Linux 8.8 Extended Update Support	unaffected `0:4.17.5-5.el8_8 - < *`
Red Hat	Red Hat Enterprise Linux 9	unaffected `0:4.18.6-100.el9 - < *`
Red Hat	Red Hat Enterprise Linux 9	unaffected `0:4.18.6-100.el9 - < *`
Red Hat	Red Hat Enterprise Linux 9.2 Extended Update Support	unaffected `0:4.17.5-105.el9_2 - < *`
Red Hat	Red Hat Virtualization 4 for Red Hat Enterprise Linux 8	unaffected `0:4.15.5-15.el8_6 - < *`
Red Hat	Red Hat Enterprise Linux 6	All versions
Red Hat	Red Hat Enterprise Linux 6	All versions
Red Hat	Red Hat Enterprise Linux 7	All versions
Red Hat	Red Hat Storage 3	All versions