[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"repo-stars":3,"vuln-UBUNTU-CVE-2023-4091":6},{"stargazers_count":4,"fetched_at":5},7,"2026-06-05T14:55:33.319Z",{"id":7,"descriptions":8,"cisa":9,"weaknesses":10,"exploits":11,"aliases":12,"duplicate_of":9,"upstream":13,"downstream":16,"duplicates":19,"related":20,"reserved_at":9,"published_at":24,"modified_at":25,"state":9,"summary":26,"references_raw":28,"kevs":52,"epss":9,"epss_history":53,"metrics":54,"affected":61},"UBUNTU-CVE-2023-4091","A vulnerability was discovered in Samba, where the flaw allows SMB clients to truncate files, even with read-only permissions when the Samba VFS module \"acl_xattr\" is configured with \"acl_xattr:ignore system acls = yes\". The SMB protocol allows opening files when the client requests read-only access but then implicitly truncates the opened file to 0 bytes if the client specifies a separate OVERWRITE create disposition request. The issue arises in configurations that bypass kernel file system permissions checks, relying solely on Samba's permissions.",null,[],[],[],[14],{"_key":15},"CVE-2023-4091",[17],{"_key":18},"USN-6425-1",[],[21,23],{"_key":22},"USN-6425-3",{"_key":18},"2023-10-10T00:00:00Z","2026-04-22T14:11:15.791655Z",{"cisa_kev":27,"cisa_ransomware":27,"cisa_vendor":9,"epss_severity":9,"epss_score":9,"severity":9,"severity_score":9,"severity_version":9,"severity_source":9,"severity_vector":9,"severity_status":9},false,[29,35,39,44,48],{"url":30,"sources":31,"tags":33},"https://ubuntu.com/security/CVE-2023-4091",[32],"osv_ubuntu",[34],"REPORT",{"url":36,"sources":37,"tags":38},"https://www.samba.org/samba/security/CVE-2023-4091.html",[32],[34],{"url":40,"sources":41,"tags":42},"https://ubuntu.com/security/notices/USN-6425-1",[32],[43],"Advisory",{"url":45,"sources":46,"tags":47},"https://ubuntu.com/security/notices/USN-6425-3",[32],[43],{"url":49,"sources":50,"tags":51},"https://www.cve.org/CVERecord?id=CVE-2023-4091",[32],[34],[],[],[55],{"source":32,"cvss_v2_0":9,"cvss_v3_0":9,"cvss_v3_1":56,"cvss_v4_0":9},{"baseScore":57,"baseSeverity":9,"vectorString":58,"impactScore":59,"exploitabilityScore":60},6.5,"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N",6,7.2,[62],{"ecosystem":63,"name":64,"vendor":65,"product":64,"cpe_part":9,"purl_type":66,"purl_namespace":65,"purl_name":64,"source":9,"versions":67},"Ubuntu","samba","ubuntu","deb",[68,72,76,79],{"version":69,"is_range":70,"range_type":71,"version_start":9,"version_start_type":9,"version_end":9,"version_end_type":9,"fixed_in":9},"all",true,"ecosystem",{"version":73,"is_range":70,"range_type":71,"version_start":9,"version_start_type":9,"version_end":74,"version_end_type":75,"fixed_in":9},"lt2:4_15_13+dfsg_0ubuntu0_20_04_6","2:4.15.13+dfsg-0ubuntu0.20.04.6","excluding",{"version":77,"is_range":70,"range_type":71,"version_start":9,"version_start_type":9,"version_end":78,"version_end_type":75,"fixed_in":9},"lt2:4_15_13+dfsg_0ubuntu1_5","2:4.15.13+dfsg-0ubuntu1.5",{"version":80,"is_range":70,"range_type":71,"version_start":9,"version_start_type":9,"version_end":81,"version_end_type":75,"fixed_in":9},"lt2:4_18_6+dfsg_1ubuntu2_1","2:4.18.6+dfsg-1ubuntu2.1"]