{
  "id": "CVE-2023-27491",
  "sourceIdentifier": "security-advisories@github.com",
  "published": "2023-04-04T19:15:07.150",
  "lastModified": "2023-04-11T14:43:10.780",
  "vulnStatus": "Analyzed",
  "descriptions": [
    {
      "lang": "en",
      "value": "Envoy is an open source edge and service proxy designed for cloud-native applications. Compliant HTTP/1 service should reject malformed request lines. Prior to versions 1.26.0, 1.25.3, 1.24.4, 1.23.6, and 1.22.9, There is a possibility that non compliant HTTP/1 service may allow malformed requests, potentially leading to a bypass of security policies. This issue is fixed in versions 1.26.0, 1.25.3, 1.24.4, 1.23.6, and 1.22.9."
    }
  ],
  "metrics": {
    "cvssMetricV31": [
      {
        "source": "nvd@nist.gov",
        "type": "Primary",
        "cvssData": {
          "version": "3.1",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N",
          "attackVector": "NETWORK",
          "attackComplexity": "LOW",
          "privilegesRequired": "NONE",
          "userInteraction": "NONE",
          "scope": "UNCHANGED",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "availabilityImpact": "NONE",
          "baseScore": 9.1,
          "baseSeverity": "CRITICAL"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 5.2
      },
      {
        "source": "security-advisories@github.com",
        "type": "Secondary",
        "cvssData": {
          "version": "3.1",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N",
          "attackVector": "NETWORK",
          "attackComplexity": "LOW",
          "privilegesRequired": "NONE",
          "userInteraction": "REQUIRED",
          "scope": "UNCHANGED",
          "confidentialityImpact": "LOW",
          "integrityImpact": "LOW",
          "availabilityImpact": "NONE",
          "baseScore": 5.4,
          "baseSeverity": "MEDIUM"
        },
        "exploitabilityScore": 2.8,
        "impactScore": 2.5
      }
    ]
  },
  "weaknesses": [
    {
      "source": "nvd@nist.gov",
      "type": "Primary",
      "description": [
        {
          "lang": "en",
          "value": "CWE-444"
        }
      ]
    },
    {
      "source": "security-advisories@github.com",
      "type": "Secondary",
      "description": [
        {
          "lang": "en",
          "value": "CWE-20"
        }
      ]
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "operator": "OR",
          "negate": false,
          "cpeMatch": [
            {
              "vulnerable": true,
              "criteria": "cpe:2.3:a:envoyproxy:envoy:*:*:*:*:*:*:*:*",
              "versionEndExcluding": "1.22.9",
              "matchCriteriaId": "DAD93214-C958-4A69-9291-15D1C22CFD3F"
            },
            {
              "vulnerable": true,
              "criteria": "cpe:2.3:a:envoyproxy:envoy:*:*:*:*:*:*:*:*",
              "versionStartIncluding": "1.23.0",
              "versionEndExcluding": "1.23.6",
              "matchCriteriaId": "17BFB303-DA5A-4E83-93F7-3C1EA340E434"
            },
            {
              "vulnerable": true,
              "criteria": "cpe:2.3:a:envoyproxy:envoy:*:*:*:*:*:*:*:*",
              "versionStartIncluding": "1.24.0",
              "versionEndExcluding": "1.24.4",
              "matchCriteriaId": "92B633B8-FA4A-4630-9302-96F2C8336E36"
            },
            {
              "vulnerable": true,
              "criteria": "cpe:2.3:a:envoyproxy:envoy:*:*:*:*:*:*:*:*",
              "versionStartIncluding": "1.25.0",
              "versionEndExcluding": "1.25.3",
              "matchCriteriaId": "8AFC6741-6FDF-47F6-A4AF-B5F5233ABB71"
            }
          ]
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      ]
    }
  ],
  "references": [
    {
      "url": "https://datatracker.ietf.org/doc/html/rfc9113#section-8.3",
      "source": "security-advisories@github.com",
      "tags": [
        "Not Applicable"
      ]
    },
    {
      "url": "https://datatracker.ietf.org/doc/html/rfc9114#section-4.3.1",
      "source": "security-advisories@github.com",
      "tags": [
        "Not Applicable"
      ]
    },
    {
      "url": "https://github.com/envoyproxy/envoy/security/advisories/GHSA-5jmv-cw9p-f9rp",
      "source": "security-advisories@github.com",
      "tags": [
        "Exploit",
        "Vendor Advisory"
      ]
    },
    {
      "url": "https://www.rfc-editor.org/rfc/rfc9110#section-5.6.2",
      "source": "security-advisories@github.com",
      "tags": [
        "Not Applicable"
      ]
    }
  ]
}