{
  "cveId": "CVE-2023-24021",
  "url": "https://patchblox.com/security/cve/CVE-2023-24021",
  "summary": "CVE-2023-24021 is fixed in 2 products on 1 platform, first by libapache2-mod-security2 2.9.2-1ubuntu0.1~esm1, released January 20, 2023. It is not reported as exploited. Patch Radar priority: High.",
  "title": "modsecurity-apache: Incorrect handling of \u0027\\0\u0027 bytes in file uploads in ModSecurity before 2.9.7 may allow for Web Application Firewall b...",
  "description": "Incorrect handling of \u0027\\0\u0027 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.",
  "published": "2023-01-20T11:15:00Z",
  "severity": "high",
  "cvss": 7.5,
  "cvssVector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N",
  "epss": 0.00931,
  "epssPercentile": 0.60892,
  "priority": "High",
  "priorityTier": 3,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "libapache2-mod-security2",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "2.9.2-1ubuntu0.1~esm1",
      "fix": "libapache2-mod-security2 2.9.2-1ubuntu0.1~esm1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-libapache2-mod-security2-2.9.2-1ubuntu0.1-esm1",
      "released": "2023-01-20T11:15:00Z"
    },
    {
      "platform": "linux",
      "product": "libapache2-mod-security2",
      "release": "Ubuntu 20.04 LTS (focal)",
      "fixedVersion": "2.9.3-1ubuntu0.1",
      "fix": "libapache2-mod-security2 2.9.3-1ubuntu0.1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-focal-libapache2-mod-security2-2.9.3-1ubuntu0.1",
      "released": "2023-01-20T11:15:00Z"
    },
    {
      "platform": "linux",
      "product": "libapache2-mod-security2",
      "release": "Ubuntu 22.04.1 LTS (jammy)",
      "fixedVersion": "2.9.5-1ubuntu0.1~esm1",
      "fix": "libapache2-mod-security2 2.9.5-1ubuntu0.1~esm1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-jammy-libapache2-mod-security2-2.9.5-1ubuntu0.1-esm1",
      "released": "2023-01-20T11:15:00Z"
    },
    {
      "platform": "linux",
      "product": "modsecurity-apache",
      "release": "Debian 12.15 (bookworm)",
      "fixedVersion": "2.9.7-1",
      "fix": "DEBIAN-CVE-2023-24021",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2023-24021",
      "released": "2023-01-20T19:15:18Z"
    },
    {
      "platform": "linux",
      "product": "modsecurity-apache",
      "release": "Debian 13.5 (trixie)",
      "fixedVersion": "2.9.7-1",
      "fix": "DEBIAN-CVE-2023-24021",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2023-24021",
      "released": "2023-01-20T19:15:18Z"
    },
    {
      "platform": "linux",
      "product": "modsecurity-apache",
      "release": "Debian 14",
      "fixedVersion": "2.9.7-1",
      "fix": "DEBIAN-CVE-2023-24021",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2023-24021",
      "released": "2023-01-20T19:15:18Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-09T07:25:28Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}