CVE-2003-0896

Status: ModifiedHigh (7.5)—💥 Exploit

The loadClass method of the sun.applet.AppletClassLoader class in the Java Virtual Machine (JVM) in Sun SDK and JRE 1.4.1_03 and earlier allows remote attackers to bypass sandbox restrictions and execute arbitrary code via a loaded class name that contains "/" (slash) instead of "." (dot) characters, which bypasses a call to the Security Manager's checkPackageAccess method.

CVSS

Version: 2.0
Vector: AV:N/AC:L/Au:N/C:P/I:P/A:P
Base score: 7.5

Exploitation probability (EPSS)

Probability of exploitation in the next 30 days: 14%
Percentile among all scored CVEs: 97
Score date: 10/14/2026

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).

💥 Public exploits

Exploit code or detection templates are publicly available. This is not the same as confirmed active exploitation (KEV), but it raises the risk: patch with priority.

Published on Exploit-DB · Sun Java Virtual Machine 1.x - Slash Path Security Model Circumvention (10/22/2003)

Affected technologies (1)

SUN — JRE

CWEs

NVD-CWE-Other

References

Raw JSON (NVD)

Show

{
  "id": "CVE-2003-0896",
  "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": false,
        "obtainOtherPrivilege": true,
        "userInteractionRequired": false
      }
    ]
  },
  "affected": [
    {
      "source": "cve@mitre.org",
      "affectedData": [
        {
          "vendor": "n/a",
          "product": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "n/a"
            }
          ]
        }
      ]
    }
  ],
  "published": "2003-11-17T05:00:00.000",
  "references": [
    {
      "url": "http://lsd-pl.net/code/JVM/jre.tar.gz",
      "source": "cve@mitre.org"
    },
    {
      "url": "http://marc.info/?l=bugtraq&m=106692334503819&w=2",
      "source": "cve@mitre.org"
    },
    {
      "url": "http://sunsolve.sun.com/pub-cgi/retrieve.pl?doc=fsalert/57221",
      "source": "cve@mitre.org"
    },
    {
      "url": "http://sunsolve.sun.com/search/document.do?assetkey=1-66-200356-1",
      "source": "cve@mitre.org"
    },
    {
      "url": "http://www.securityfocus.com/advisories/6028",
      "source": "cve@mitre.org"
    },
    {
      "url": "http://www.securityfocus.com/archive/1/342580",
      "source": "cve@mitre.org"
    },
    {
      "url": "http://www.securityfocus.com/archive/1/342583",
      "source": "cve@mitre.org"
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    {
      "url": "http://www.securityfocus.com/bid/8879",
      "source": "cve@mitre.org"
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    {
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    {
      "url": "http://www.securityfocus.com/advisories/6028",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
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    {
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      "source": "af854a3a-2127-422b-91ae-364da2661108"
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    {
      "url": "http://www.securityfocus.com/archive/1/342583",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "http://www.securityfocus.com/bid/8879",
      "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 loadClass method of the sun.applet.AppletClassLoader class in the Java Virtual Machine (JVM) in Sun SDK and JRE 1.4.1_03 and earlier allows remote attackers to bypass sandbox restrictions and execute arbitrary code via a loaded class name that contains \"/\" (slash) instead of \".\" (dot) characters, which bypasses a call to the Security Manager's checkPackageAccess method."
    },
    {
      "lang": "es",
      "value": "El método loadClass de la clase sun.applet.AppletClassLoader en la Máquina Virtual de Java (JVM) en Sun SDK y JRE 1.4.1_03 y anteriores permite a atacantes remotos saltarles las restricciones del cajón de arena de Java y ejecutar código mediante una clase cargada que contenga caractéres \"/\" (barra) en lugar de \".\" punto, lo que evita la llamada al método del Adminstrador de Seguridad checkPackageAccess."
    }
  ],
  "lastModified": "2026-06-16T22:03:08.760",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
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              "criteria": "cpe:2.3:a:sun:jre:*:update3:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "B86E994F-ACB5-40C7-A9AF-E0A938C3A3D3",
              "versionEndIncluding": "1.4.1"
            }
          ],
          "operator": "OR"
        }
      ]
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  ],
  "sourceIdentifier": "cve@mitre.org"
}