{"id":"CVE-2023-34966","title":"Samba: infinite loop in mdssvc rpc service for spotlight","summary":"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 …","severity":"high","cvss":7.5,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","cvssSource":"cna","cwe":["CWE-835"],"vendor":"Red Hat","product":"samba","affected":["samba (all versions)","samba (all versions)","samba (all versions)","samba (all versions)","samba (all versions)","samba (all versions)","samba (all versions)","samba (all versions)","samba","samba4","samba","samba"],"published":"2023-07-20","updated":"2026-11-07","sourceUpdated":"2026-11-07T06:13:26.660Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2023-34966","references":[{"url":"https://access.redhat.com/errata/RHSA-2023:6667","label":"RHSA-2023:6667"},{"url":"https://access.redhat.com/errata/RHSA-2023:7139","label":"RHSA-2023:7139"},{"url":"https://access.redhat.com/errata/RHSA-2024:0423","label":"RHSA-2024:0423"},{"url":"https://access.redhat.com/errata/RHSA-2024:0580","label":"RHSA-2024:0580"},{"url":"https://access.redhat.com/errata/RHSA-2024:4101","label":"RHSA-2024:4101"},{"url":"https://access.redhat.com/security/cve/CVE-2023-34966"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2222793","label":"RHBZ#2222793"},{"url":"https://www.samba.org/samba/security/CVE-2023-34966"}],"tags":["cve.org"],"epss":0.62402,"epssPercentile":0.9919,"ingestedAt":"2026-11-07T07:12:31.885Z","slug":"CVE-2023-34966","body":"## Overview\n\nAn 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.\n\n## Affected\n\n- `samba (all versions)`\n- `samba (all versions)`\n- `samba (all versions)`\n- `samba (all versions)`\n- `samba (all versions)`\n- `samba (all versions)`\n- `samba (all versions)`\n- `samba (all versions)`\n- `samba`\n- `samba4`\n- `samba`\n- `samba`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\n\n### Workarounds\n\nAs a possible workaround, disable Spotlight by removing all configuration stanzas (\"spotlight=yes|true\") that enable Spotlight .","depth":"twilight","depthScore":54,"depthScoreParts":{"impact":41.3,"likelihood":12.5,"exploitation":0,"ransomware":0},"changes":[]}