{"id":"CVE-2023-3347","summary":"Samba: smb2 packet signing is not enforced when \"server signing = required\" is set","details":"A vulnerability was found in Samba's SMB2 packet signing mechanism. The SMB2 packet signing is not enforced if an admin configured \"server signing = required\" or for SMB2 connections to Domain Controllers where SMB2 packet signing is mandatory. This flaw allows an attacker to perform attacks, such as a man-in-the-middle attack, by intercepting the network traffic and modifying the SMB2 messages between client and server, affecting the integrity of the data.","modified":"2026-05-15T12:04:50.803963093Z","published":"2023-07-20T14:54:05.525Z","related":["ALSA-2023:4325","ALSA-2023:4328","SUSE-SU-2023:2929-1","openSUSE-SU-2024:13071-1"],"database_specific":{"cna_assigner":"redhat","cwe_ids":["CWE-347"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/3xxx/CVE-2023-3347.json"},"references":[{"type":"WEB","url":"https://access.redhat.com/downloads/content/package-browser/"},{"type":"WEB","url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/BPCSGND7LO467AJGR5DYBGZLTCGTOBCC/"},{"type":"WEB","url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/OT74M42E6C36W7PQVY3OS4ZM7DVYB64Z/"},{"type":"WEB","url":"https://www.samba.org/samba/security/CVE-2023-3347.html"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2023:4325"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2023:4328"},{"type":"ADVISORY","url":"https://access.redhat.com/security/cve/CVE-2023-3347"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/3xxx/CVE-2023-3347.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2023-3347"},{"type":"ADVISORY","url":"https://security.netapp.com/advisory/ntap-20230731-0010/"},{"type":"ADVISORY","url":"https://www.debian.org/security/2023/dsa-5477"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2222792"}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N"}]}