{"id":"CVE-2023-24021","aliases":["AZL-43843","AZL-44475","BIT-modsecurity-2023-24021","BIT-modsecurity2-2023-24021","DEBIAN-CVE-2023-24021","DLA-3283-1","EUVD-2023-28085","GHSA-845r-7x4c-q8qf","MGASA-2023-0175","RHSA-2023:4629","SUSE-SU-2023:0431-1","SUSE-SU-2023:0447-1","UBUNTU-CVE-2023-24021","USN-6370-1"],"status":"published","title":"In ModSecurity before 2.9.7, FILES_TMP_CONTENT sometimes lacked the complete content. 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handling of '\\0' bytes in file uploads in ModSecurity before 2.9.7 may allow for Web Application Firewall bypasses and buffer over-reads on the Web Application Firewall when executing rules that read the FILES_TMP_CONTENT collection.","status":"published","published":"2023-01-20T00:00:00Z","modified":"2025-04-02T16:18:27.85Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N","level":"high","assessor":"adp"}],"cwes":["CWE-170"],"updated_at":"2026-11-02T14:35:26.63732Z"}],"euvd":[{"id":"EUVD-2023-28085","description":"Incorrect handling of '\\0' bytes in file uploads in ModSecurity before 2.9.7 may allow for Web Application Firewall bypasses and buffer over-reads on the Web Application Firewall when executing rules that read the FILES_TMP_CONTENT collection.","status":"published","published":"2023-01-20T00:00:00Z","modified":"2025-04-02T16:18:27Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N","level":"high"}],"updated_at":"2026-11-02T20:52:44.372321Z"}],"ghsa":[{"id":"GHSA-845r-7x4c-q8qf","title":"In ModSecurity before 2.9.7, FILES_TMP_CONTENT sometimes lacked the complete content. This can...","description":"In ModSecurity before 2.9.7, FILES_TMP_CONTENT sometimes lacked the complete content. This can lead to a Web Application Firewall bypass.","status":"published","published":"2023-01-20T21:30:29Z","modified":"2025-04-02T18:31:44Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical"}],"cwes":["CWE-170"],"updated_at":"2026-11-02T15:00:36.145205Z"}],"nvd":[{"id":"CVE-2023-24021","description":"Incorrect handling of '\\0' bytes in file uploads in ModSecurity before 2.9.7 may allow for Web Application Firewall bypasses and buffer over-reads on the Web Application Firewall when executing rules that read the FILES_TMP_CONTENT collection.","status":"published","published":"2023-01-20T19:15:18.593Z","modified":"2026-06-17T05:38:29.493Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N","level":"high","assessor":"primary"},{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N","level":"high","assessor":"secondary"}],"cwes":["CWE-170"],"updated_at":"2026-11-02T14:07:45.305824Z"}],"osv":[{"id":"AZL-43843","title":"CVE-2023-24021 affecting package mod_security 2.9.4-1","description":"Incorrect handling of '\\0' bytes in file uploads in ModSecurity before 2.9.7 may allow for Web Application Firewall bypasses and buffer over-reads on the Web Application Firewall when executing rules that read the FILES_TMP_CONTENT collection.","status":"published","published":"2023-01-20T19:15:18Z","modified":"2026-04-21T04:31:11.109676Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N","level":"high"}],"updated_at":"2026-11-02T15:28:05.284713Z"},{"id":"AZL-44475","title":"CVE-2023-24021 affecting package mod_security for versions less than 2.9.7-8","description":"Incorrect handling of '\\0' bytes in file uploads in ModSecurity before 2.9.7 may allow for Web Application Firewall bypasses and buffer over-reads on the Web Application Firewall when executing rules that read the FILES_TMP_CONTENT collection.","status":"published","published":"2023-01-20T19:15:18Z","modified":"2026-04-21T04:52:16.348086Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N","level":"high"}],"updated_at":"2026-11-02T15:28:05.284713Z"},{"id":"CVE-2023-24021","description":"Incorrect handling of '\\0' bytes in file uploads in ModSecurity before 2.9.7 may allow for Web Application Firewall bypasses and buffer over-reads on the Web Application Firewall when executing rules that read the FILES_TMP_CONTENT collection.","status":"published","published":"2023-01-20T00:00:00Z","modified":"2026-10-28T02:30:41.344880474Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N","level":"high"}],"updated_at":"2026-11-02T15:44:30.709518Z"},{"id":"DEBIAN-CVE-2023-24021","description":"Incorrect handling of '\\0' bytes in file uploads in ModSecurity before 2.9.7 may allow for Web Application Firewall bypasses and buffer over-reads on the Web Application Firewall when executing rules that read the FILES_TMP_CONTENT collection.","status":"published","published":"2023-01-20T19:15:18.593Z","modified":"2026-10-26T18:00:33.510690978Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N","level":"high"}],"updated_at":"2026-11-02T15:45:39.369204Z"},{"id":"RHSA-2023:4629","title":"Red Hat Security Advisory: Red Hat JBoss Core Services Apache HTTP Server 2.4.57 security update","status":"published","published":"2024-09-13T23:26:54Z","modified":"2026-09-21T10:05:09Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N","level":"high"}],"updated_at":"2026-11-02T15:53:11.154197Z"},{"id":"UBUNTU-CVE-2023-24021","description":"Incorrect handling of '\\0' bytes in file uploads in ModSecurity before 2.9.7 may allow for Web Application Firewall bypasses and buffer over-reads on the Web Application Firewall when executing rules that read the FILES_TMP_CONTENT collection.","status":"published","published":"2023-01-20T19:15:00Z","modified":"2026-02-04T04:29:22.496001Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N","level":"high"},{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N","level":"high"}],"updated_at":"2026-11-02T16:54:20.198616Z"},{"id":"BIT-modsecurity-2023-24021","description":"Incorrect handling of '\\0' bytes in file uploads in ModSecurity before 2.9.7 may allow for Web Application Firewall bypasses and buffer over-reads on the Web Application Firewall when executing rules that read the FILES_TMP_CONTENT collection.","status":"published","published":"2024-03-06T10:56:44.073Z","modified":"2026-09-08T08:48:13.899792263Z","updated_at":"2026-11-02T15:28:33.072289Z"},{"id":"BIT-modsecurity2-2023-24021","description":"Incorrect handling of '\\0' bytes in file uploads in ModSecurity before 2.9.7 may allow for Web Application Firewall bypasses and buffer over-reads on the Web Application Firewall when executing rules that read the FILES_TMP_CONTENT collection.","status":"published","published":"2024-03-06T10:56:51.795Z","modified":"2026-09-08T08:46:34.614562356Z","updated_at":"2026-11-02T15:28:33.072289Z"},{"id":"DLA-3283-1","title":"modsecurity-apache - security update","status":"published","published":"2023-01-26T00:00:00Z","modified":"2026-03-09T01:21:55.804647Z","updated_at":"2026-11-02T15:46:11.734021Z"},{"id":"MGASA-2023-0175","title":"Updated apache-mod_security packages fix security vulnerability","description":"HTTP multipart requests were incorrectly parsed and could bypass the Web\nApplication Firewall (CVE-2022-48279)\nIncorrect handling of '\\0' bytes in file uploads in ModSecurity may allow\nfor Web Application Firewall bypasses and buffer over-reads on the Web\nApplication Firewall when executing rules that read the FILES_TMP_CONTENT\ncollection. (CVE-2023-24021)\n","status":"published","published":"2023-05-21T08:42:44Z","modified":"2026-04-16T04:44:01.535748965Z","updated_at":"2026-11-02T15:49:42.263076Z"},{"id":"SUSE-SU-2023:0431-1","title":"Security update for apache2-mod_security2","description":"This update for apache2-mod_security2 fixes the following issues:\n\n  - CVE-2023-24021: Fixed FILES_TMP_CONTENT missing complete content (bsc#1207379).\n","status":"published","published":"2023-02-15T16:43:18Z","modified":"2025-05-02T04:34:38.938839Z","updated_at":"2026-11-02T15:53:51.853735Z"},{"id":"SUSE-SU-2023:0447-1","title":"Security update for apache2-mod_security2","description":"This update for apache2-mod_security2 fixes the following issues:\n\n  - CVE-2023-24021: Fixed FILES_TMP_CONTENT missing complete content (bsc#1207379).\n","status":"published","published":"2023-02-17T13:24:43Z","modified":"2026-02-04T02:21:16.505267Z","updated_at":"2026-11-02T15:53:51.853735Z"},{"id":"USN-6370-1","title":"modsecurity-apache vulnerabilities","description":"It was discovered that ModSecurity incorrectly handled certain nested JSON\nobjects. An attacker could possibly use this issue to cause a denial\nof service. This issue only affected Ubuntu 16.04 LTS, Ubuntu 18.04 LTS\nand Ubuntu 20.04 LTS. (CVE-2021-42717)\n\nIt was discovered that ModSecurity incorrectly handled certain HTTP\nmultipart requests. A remote attacker could possibly use this issue\nto bypass ModSecurity restrictions. (CVE-2022-48279)\n\nIt was discovered that ModSecurity incorrectly handled certain file\nuploads. A remote attacker could possibly use this issue to cause a\nbuffer overflow and a firewall failure. This issue only affected\nUbuntu 16.04 LTS, Ubuntu 18.04 LTS, Ubuntu 20.04 LTS and Ubuntu 22.04 LTS.\n(CVE-2023-24021)\n","status":"published","published":"2023-09-14T14:06:25Z","modified":"2026-06-29T13:50:56.905907875Z","updated_at":"2026-11-02T16:58:17.305935Z"}]}}