{
  "id": "CVE-2021-27291",
  "sourceIdentifier": "cve@mitre.org",
  "published": "2021-03-17T13:15:15.137",
  "lastModified": "2024-11-21T05:57:45.667",
  "vulnStatus": "Modified",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In pygments 1.1+, fixed in 2.7.4, the lexers used to parse programming languages rely heavily on regular expressions. Some of the regular expressions have exponential or cubic worst-case complexity and are vulnerable to ReDoS. By crafting malicious input, an attacker can cause a denial of service."
    },
    {
      "lang": "es",
      "value": "En pygments versi\u00f3n 1.1+, corregido en 2.7.4, los lexers usados para analizar unos lenguajes de programaci\u00f3n dependen en gran medida en expresiones regulares. Algunas de las expresiones regulares presentan una complejidad exponencial o c\u00fabica en el peor de los casos y son vulnerables a ReDoS. Al dise\u00f1ar una entrada maliciosa, un atacante puede causar una denegaci\u00f3n de servicio"
    }
  ],
  "metrics": {
    "cvssMetricV31": [
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        "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:N/I:N/A:H",
          "baseScore": 7.5,
          "baseSeverity": "HIGH",
          "attackVector": "NETWORK",
          "attackComplexity": "LOW",
          "privilegesRequired": "NONE",
          "userInteraction": "NONE",
          "scope": "UNCHANGED",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "availabilityImpact": "HIGH"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 3.6
      }
    ],
    "cvssMetricV2": [
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        "source": "nvd@nist.gov",
        "type": "Primary",
        "cvssData": {
          "version": "2.0",
          "vectorString": "AV:N/AC:L/Au:N/C:N/I:N/A:P",
          "baseScore": 5.0,
          "accessVector": "NETWORK",
          "accessComplexity": "LOW",
          "authentication": "NONE",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "availabilityImpact": "PARTIAL"
        },
        "baseSeverity": "MEDIUM",
        "exploitabilityScore": 10.0,
        "impactScore": 2.9,
        "acInsufInfo": false,
        "obtainAllPrivilege": false,
        "obtainUserPrivilege": false,
        "obtainOtherPrivilege": false,
        "userInteractionRequired": false
      }
    ]
  },
  "weaknesses": [
    {
      "source": "nvd@nist.gov",
      "type": "Primary",
      "description": [
        {
          "lang": "en",
          "value": "CWE-1333"
        }
      ]
    }
  ],
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          "operator": "OR",
          "negate": false,
          "cpeMatch": [
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              "vulnerable": true,
              "criteria": "cpe:2.3:a:pygments:pygments:*:*:*:*:*:*:*:*",
              "versionStartIncluding": "1.1",
              "versionEndExcluding": "2.7.4",
              "matchCriteriaId": "CD77E0B1-BE2B-4B95-91AA-AD9AAEFD6DA8"
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      "url": "https://gist.github.com/b-c-ds/b1a2cc0c68a35c57188575eb496de5ce",
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}