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.

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Advisories
Source ID Title
Debian DSA Debian DSA DSA-5477-1 samba security update
Debian DSA Debian DSA DSA-5647-1 samba security update
Ubuntu USN Ubuntu USN USN-6238-1 Samba vulnerabilities
Ubuntu USN Ubuntu USN USN-7582-1 Samba vulnerabilities
Fixes

Solution

No solution given by the vendor.


Workaround

As a possible workaround, disable Spotlight by removing all configuration stanzas ("spotlight=yes|true") that enable Spotlight .

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: redhat

Published:

Updated: 2025-11-20T17:28:59.854Z

Reserved: 2023-06-07T21:11:04.261Z

Link: CVE-2023-34966

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Modified

Published: 2023-07-20T15:15:11.333

Modified: 2024-11-21T08:07:44.103

Link: CVE-2023-34966

cve-icon Redhat

Severity : Moderate

Publid Date: 2023-07-19T00:00:00Z

Links: CVE-2023-34966 - Bugzilla

cve-icon OpenCVE Enrichment

No data.

Weaknesses