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CVE-2003-0550

Status: ModifiedMedium (5)—
Severity5Medium · CVSS 2.0
Exploitation probability1.94 %higher than 80% of CVEs
Active exploitationNonot in the CISA catalog
Public exploitNot knownno public code found

The STP protocol, as enabled in Linux 2.4.x, does not provide sufficient security by design, which allows attackers to modify the bridge topology.

CVSS

Base score
5
Version
2.0
Vector
AV:N/AC:L/Au:N/C:N/I:P/A:N

Exploitation probability (EPSS)

Probability of exploitation in the next 30 days
1.94 %
Percentile among all scored CVEs
80
Score date
10/20/2026

EPSS (Exploit Prediction Scoring System, FIRST) estimates how likely a vulnerability is to be exploited in the wild within 30 days. It complements CVSS (impact) and CISA KEV (confirmed exploitation).

Affected technologies (1)

Redhat — Linux

CWEs

References

Show 10 references

Raw JSON (NVD)

Show
{
  "id": "CVE-2003-0550",
  "cveTags": [],
  "metrics": {
    "cvssMetricV2": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "version": "2.0",
          "baseScore": 5,
          "accessVector": "NETWORK",
          "vectorString": "AV:N/AC:L/Au:N/C:N/I:P/A:N",
          "authentication": "NONE",
          "integrityImpact": "PARTIAL",
          "accessComplexity": "LOW",
          "availabilityImpact": "NONE",
          "confidentialityImpact": "NONE"
        },
        "acInsufInfo": false,
        "impactScore": 2.9,
        "baseSeverity": "MEDIUM",
        "obtainAllPrivilege": false,
        "exploitabilityScore": 10,
        "obtainUserPrivilege": false,
        "obtainOtherPrivilege": false,
        "userInteractionRequired": false
      }
    ]
  },
  "affected": [
    {
      "source": "cve@mitre.org",
      "affectedData": [
        {
          "vendor": "n/a",
          "product": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "n/a"
            }
          ]
        }
      ]
    }
  ],
  "published": "2003-08-27T04:00:00.000",
  "references": [
    {
      "url": "http://www.debian.org/security/2004/dsa-358",
      "source": "cve@mitre.org"
    },
    {
      "url": "http://www.debian.org/security/2004/dsa-423",
      "tags": [
        "Patch",
        "Vendor Advisory"
      ],
      "source": "cve@mitre.org"
    },
    {
      "url": "http://www.redhat.com/support/errata/RHSA-2003-238.html",
      "tags": [
        "Patch",
        "Vendor Advisory"
      ],
      "source": "cve@mitre.org"
    },
    {
      "url": "http://www.redhat.com/support/errata/RHSA-2003-239.html",
      "source": "cve@mitre.org"
    },
    {
      "url": "https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A380",
      "source": "cve@mitre.org"
    },
    {
      "url": "http://www.debian.org/security/2004/dsa-358",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "http://www.debian.org/security/2004/dsa-423",
      "tags": [
        "Patch",
        "Vendor Advisory"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "http://www.redhat.com/support/errata/RHSA-2003-238.html",
      "tags": [
        "Patch",
        "Vendor Advisory"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "http://www.redhat.com/support/errata/RHSA-2003-239.html",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A380",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    }
  ],
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "NVD-CWE-Other"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "The STP protocol, as enabled in Linux 2.4.x, does not provide sufficient security by design, which allows attackers to modify the bridge topology."
    },
    {
      "lang": "es",
      "value": "El protocolo STP, activado en Linux 2.4.x, no provee de suficiente seguridad por diseño, lo que permite a atacantes modificar la topología de puente."
    }
  ],
  "lastModified": "2026-06-16T22:02:25.193",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:redhat:linux:2.4.2:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "9E297EF4-139A-4FF4-AF1B-F3559B992775"
            }
          ],
          "operator": "OR"
        }
      ]
    }
  ],
  "sourceIdentifier": "cve@mitre.org"
}