CVE-2023-34966

Advisory lineage Upstream: 0 Downstream: 18
Modified
Published: 20 Jul 2023, 14:56
Last modified:20 Nov 2025, 17:28

Vulnerability Summary

Overall Risk (default)
medium
33/100
CVSS Score
7.5 HIGH
v3.1 (cve.org)
EPSS Score
14.31% MEDIUM
14% probability -1.59%
KEV
Not listed
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected

Timeline

20 Jul 2023, 14:56
Published
Vulnerability first disclosed
20 Nov 2025, 17:28
Last Modified
Vulnerability information updated

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.

CVSS Metrics

  • v3.1•HIGH•Score: 7.5CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS Trends

Current EPSS score: 14.31%• Percentile: 95%

Techniques & Countermeasures

  • CWE-835•Loop with Unreachable Exit Condition ('Infinite Loop')

    The product contains an iteration or loop with an exit condition that cannot be reached, i.e., an infinite loop.

Affected Systems

  • debian•debian_linux

    11.0 | 12.0

  • fedoraproject•fedora

    37 | 38

  • redhat•enterprise_linux

    8.0 | 9.0

  • samba•samba

    < 4.16.11 | ≥ 4.17.0, < 4.17.10 | ≥ 4.18.0, < 4.18.5

References (12)