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CVE-2003-0899

Estado: ModificadaCrítica (9.8)—

Buffer overflow in defang in libhttpd.c for thttpd 2.21 to 2.23b1 allows remote attackers to execute arbitrary code via requests that contain '<' or '>' characters, which trigger the overflow when the characters are expanded to "&lt;" and "&gt;" sequences.

CVSS

Probabilidad de explotación (EPSS)

EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).

Tecnologías afectadas (1)

Acme — Thttpd

CWE

Referencias

JSON original (NVD)

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{
  "id": "CVE-2003-0899",
  "cveTags": [],
  "metrics": {
    "cvssMetricV2": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "version": "2.0",
          "baseScore": 7.5,
          "accessVector": "NETWORK",
          "vectorString": "AV:N/AC:L/Au:N/C:P/I:P/A:P",
          "authentication": "NONE",
          "integrityImpact": "PARTIAL",
          "accessComplexity": "LOW",
          "availabilityImpact": "PARTIAL",
          "confidentialityImpact": "PARTIAL"
        },
        "acInsufInfo": false,
        "impactScore": 6.4,
        "baseSeverity": "HIGH",
        "obtainAllPrivilege": false,
        "exploitabilityScore": 10,
        "obtainUserPrivilege": true,
        "obtainOtherPrivilege": false,
        "userInteractionRequired": false
      }
    ],
    "cvssMetricV31": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 9.8,
          "attackVector": "NETWORK",
          "baseSeverity": "CRITICAL",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
          "integrityImpact": "HIGH",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "HIGH"
        },
        "impactScore": 5.9,
        "exploitabilityScore": 3.9
      }
    ]
  },
  "affected": [
    {
      "source": "cve@mitre.org",
      "affectedData": [
        {
          "vendor": "n/a",
          "product": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "n/a"
            }
          ]
        }
      ]
    }
  ],
  "published": "2003-11-03T05:00:00.000",
  "references": [
    {
      "url": "http://marc.info/?l=bugtraq&m=106729188224252&w=2",
      "tags": [
        "Exploit",
        "Mailing List"
      ],
      "source": "cve@mitre.org"
    },
    {
      "url": "http://secunia.com/advisories/10092",
      "tags": [
        "Broken Link",
        "Patch",
        "Vendor Advisory"
      ],
      "source": "cve@mitre.org"
    },
    {
      "url": "http://www.osvdb.org/2729",
      "tags": [
        "Broken Link"
      ],
      "source": "cve@mitre.org"
    },
    {
      "url": "http://www.securityfocus.com/bid/8906",
      "tags": [
        "Broken Link",
        "Exploit",
        "Patch",
        "Third Party Advisory",
        "VDB Entry"
      ],
      "source": "cve@mitre.org"
    },
    {
      "url": "http://www.texonet.com/advisories/TEXONET-20030908.txt",
      "tags": [
        "Broken Link",
        "URL Repurposed"
      ],
      "source": "cve@mitre.org"
    },
    {
      "url": "https://exchange.xforce.ibmcloud.com/vulnerabilities/13530",
      "tags": [
        "Third Party Advisory",
        "VDB Entry"
      ],
      "source": "cve@mitre.org"
    },
    {
      "url": "https://www.debian.org/security/2003/dsa-396",
      "tags": [
        "Broken Link"
      ],
      "source": "cve@mitre.org"
    },
    {
      "url": "http://marc.info/?l=bugtraq&m=106729188224252&w=2",
      "tags": [
        "Exploit",
        "Mailing List"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "http://secunia.com/advisories/10092",
      "tags": [
        "Broken Link",
        "Patch",
        "Vendor Advisory"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "http://www.osvdb.org/2729",
      "tags": [
        "Broken Link"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "http://www.securityfocus.com/bid/8906",
      "tags": [
        "Broken Link",
        "Exploit",
        "Patch",
        "Third Party Advisory",
        "VDB Entry"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "http://www.texonet.com/advisories/TEXONET-20030908.txt",
      "tags": [
        "Broken Link",
        "URL Repurposed"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://exchange.xforce.ibmcloud.com/vulnerabilities/13530",
      "tags": [
        "Third Party Advisory",
        "VDB Entry"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://www.debian.org/security/2003/dsa-396",
      "tags": [
        "Broken Link"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    }
  ],
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "CWE-131"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "Buffer overflow in defang in libhttpd.c for thttpd 2.21 to 2.23b1 allows remote attackers to execute arbitrary code via requests that contain '<' or '>' characters, which trigger the overflow when the characters are expanded to \"&lt;\" and \"&gt;\" sequences."
    },
    {
      "lang": "es",
      "value": "Desbordamiento de búfer en la función defang en libhttpd.c de thttpd 2.21 a 2.23b1, permite a atacantes remotos ejecutar código de su elección mediante peticiones que contienen caracteres '<' ó '>' que provocan el desbordamiento cuando son expandidos a las secuencias \"<\" y \">\"."
    }
  ],
  "lastModified": "2026-06-16T22:03:09.093",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:acme:thttpd:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "7F368CAF-B770-4657-81D2-69D9A678F3D1",
              "versionEndExcluding": "2.23",
              "versionStartIncluding": "2.21"
            },
            {
              "criteria": "cpe:2.3:a:acme:thttpd:2.23:-:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "1059FC0B-2461-4032-BB11-D21598AECCCB"
            },
            {
              "criteria": "cpe:2.3:a:acme:thttpd:2.23:b1:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "A8F2CDC4-B206-4D8B-8F11-51FA22AD49E5"
            }
          ],
          "operator": "OR"
        }
      ]
    }
  ],
  "sourceIdentifier": "cve@mitre.org",
  "evaluatorSolution": "This vulnerability is addressed in the following product release:\nAcme Labs, thttpd, 2.24"
}