{
  "GSD": {
    "alias": "CVE-2023-22795",
    "id": "GSD-2023-22795",
    "references": [
      "https://www.suse.com/security/cve/CVE-2023-22795.html",
      "https://www.debian.org/security/2023/dsa-5372"
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    "metadata": {
      "exploitCode": "unknown",
      "remediation": "unknown",
      "reportConfidence": "confirmed",
      "type": "vulnerability"
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      "affected": [
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          "package": {
            "ecosystem": "RubyGems",
            "name": "actionpack",
            "purl": "pkg:gem/actionpack"
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      "aliases": [
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      "id": "GSD-2023-22795",
      "modified": "2023-01-18T00:00:00.000Z",
      "published": "2023-01-18T00:00:00.000Z",
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      "summary": "ReDoS based DoS vulnerability in Action Dispatch"
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      "description": "There is a possible regular expression based DoS vulnerability in Action\nDispatch related to the If-None-Match header. This vulnerability has been\nassigned the CVE identifier CVE-2023-22795.\n\nVersions Affected: All\nNot affected: None\nFixed Versions: 5.2.8.15 (Rails LTS), 6.1.7.1, 7.0.4.1\n\n# Impact\n\nA specially crafted HTTP If-None-Match header can cause the regular\nexpression engine to enter a state of catastrophic backtracking, when on a\nversion of Ruby below 3.2.0. This can cause the process to use large amounts\nof CPU and memory, leading to a possible DoS vulnerability All users running\nan affected release should either upgrade or use one of the workarounds\nimmediately.\n\n# Workarounds\n\nWe recommend that all users upgrade to one of the FIXED versions. In the\nmeantime, users can mitigate this vulnerability by using a load balancer or\nother device to filter out malicious If-None-Match headers before they reach\nthe application.\n\nUsers on Ruby 3.2.0 or greater are not affected by this vulnerability.",
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        "~\u003e 6.1.7, \u003e= 6.1.7.1",
        "\u003e= 7.0.4.1"
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      "title": "ReDoS based DoS vulnerability in Action Dispatch",
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          "description": "There is a possible regular expression based DoS vulnerability in Action Dispatch related to the If-None-Match header. This vulnerability has been assigned the CVE identifier CVE-2023-22795. A specially crafted HTTP `If-None-Match` header can cause the regular expression engine to enter a state of catastrophic backtracking, when on a version of Ruby below 3.2.0. This can cause the process to use large amounts of CPU and memory, leading to a possible DoS vulnerability All users running an affected release should either upgrade or use one of the workarounds immediately.",
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          "package_slug": "gem/actionpack",
          "pubdate": "2023-02-09",
          "solution": "Upgrade to versions 6.1.7.1, 7.0.4.1 or above.",
          "title": "ReDoS based DoS vulnerability in Action Dispatch",
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          "description": "A regular expression based DoS vulnerability in Action Dispatch \u003c6.1.7.1 and \u003c7.0.4.1 related to the If-None-Match header. A specially crafted HTTP If-None-Match header can cause the regular expression engine to enter a state of catastrophic backtracking, when on a version of Ruby below 3.2.0. This can cause the process to use large amounts of CPU and memory, leading to a possible DoS vulnerability All users running an affected release should either upgrade or use one of the workarounds immediately.",
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          "identifier": "CVE-2023-22795",
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          "not_impacted": "All versions starting from 6.1.7.1 before 7.0.0, all versions starting from 7.0.4.1",
          "package_slug": "gem/rails",
          "pubdate": "2023-02-09",
          "solution": "Upgrade to versions 6.1.7.1, 7.0.4.1 or above.",
          "title": "Inefficient Regular Expression Complexity",
          "urls": [
            "https://nvd.nist.gov/vuln/detail/CVE-2023-22795",
            "https://discuss.rubyonrails.org/t/cve-2023-22795-possible-redos-based-dos-vulnerability-in-action-dispatch/82118"
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          "uuid": "996eca5b-8425-49eb-b181-66b61f6a13e1"
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