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CVE-2007-4849

Estado: ModificadaMedia (4.4)—

JFFS2, as used on One Laptop Per Child (OLPC) build 542 and possibly other Linux systems, when POSIX ACL support is enabled, does not properly store permissions during (1) inode creation or (2) ACL setting, which might allow local users to access restricted files or directories after a remount of a filesystem, related to "legacy modes" and an inconsistency between dentry permissions and inode permissions.

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)

ONE Laptop PER Child — Olpc Linux

CWE

Referencias

JSON original (NVD)

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{
  "id": "CVE-2007-4849",
  "cveTags": [],
  "metrics": {
    "cvssMetricV2": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "version": "2.0",
          "baseScore": 4.4,
          "accessVector": "LOCAL",
          "vectorString": "AV:L/AC:M/Au:N/C:P/I:P/A:P",
          "authentication": "NONE",
          "integrityImpact": "PARTIAL",
          "accessComplexity": "MEDIUM",
          "availabilityImpact": "PARTIAL",
          "confidentialityImpact": "PARTIAL"
        },
        "acInsufInfo": false,
        "impactScore": 6.4,
        "baseSeverity": "MEDIUM",
        "obtainAllPrivilege": false,
        "exploitabilityScore": 3.4,
        "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": "2007-09-12T20:17:00.000",
  "references": [
    {
      "url": "http://dev.laptop.org/ticket/2732",
      "source": "cve@mitre.org"
    },
    {
      "url": "http://git.infradead.org/?p=mtd-2.6.git%3Ba=commitdiff%3Bh=9ed437c50d89eabae763dd422579f73fdebf288d",
      "source": "cve@mitre.org"
    },
    {
      "url": "http://lists.infradead.org/pipermail/linux-mtd-cvs/2007-August/005897.html",
      "source": "cve@mitre.org"
    },
    {
      "url": "http://secunia.com/advisories/26978",
      "source": "cve@mitre.org"
    },
    {
      "url": "http://secunia.com/advisories/28170",
      "source": "cve@mitre.org"
    },
    {
      "url": "http://secunia.com/advisories/28706",
      "source": "cve@mitre.org"
    },
    {
      "url": "http://www.debian.org/security/2007/dsa-1378",
      "source": "cve@mitre.org"
    },
    {
      "url": "http://www.securityfocus.com/bid/25838",
      "source": "cve@mitre.org"
    },
    {
      "url": "http://www.ubuntu.com/usn/usn-558-1",
      "source": "cve@mitre.org"
    },
    {
      "url": "http://www.ubuntu.com/usn/usn-574-1",
      "source": "cve@mitre.org"
    },
    {
      "url": "http://dev.laptop.org/ticket/2732",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "http://git.infradead.org/?p=mtd-2.6.git%3Ba=commitdiff%3Bh=9ed437c50d89eabae763dd422579f73fdebf288d",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "http://lists.infradead.org/pipermail/linux-mtd-cvs/2007-August/005897.html",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "http://secunia.com/advisories/26978",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "http://secunia.com/advisories/28170",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "http://secunia.com/advisories/28706",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "http://www.debian.org/security/2007/dsa-1378",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "http://www.securityfocus.com/bid/25838",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "http://www.ubuntu.com/usn/usn-558-1",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "http://www.ubuntu.com/usn/usn-574-1",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    }
  ],
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "CWE-264"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "JFFS2, as used on One Laptop Per Child (OLPC) build 542 and possibly other Linux systems, when POSIX ACL support is enabled, does not properly store permissions during (1) inode creation or (2) ACL setting, which might allow local users to access restricted files or directories after a remount of a filesystem, related to \"legacy modes\" and an inconsistency between dentry permissions and inode permissions."
    },
    {
      "lang": "es",
      "value": "JFFS2. utilizado sobre One Laptop Per Child (OLPC) construción 542 y posiblemente otros sistemas Linux, cuando el apoyo POSIX ACL está activado, no almancena de forma adecuada los permisos a lo largo de (1) la creación de un inodo o la configuración (2) ACL. el cual podría permitir a usuarios locales acceder a archivos o directorios restringidos después de remontar el sistema de archivos, relacionado con \"modos de herencia\" y una inconsistencia entre permisos de entrada y permisos de inode."
    }
  ],
  "lastModified": "2026-06-16T22:44:54.790",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:one_laptop_per_child:olpc_linux:build_542:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "9A98BD1C-5508-4CDE-9077-0FBE17E32340"
            }
          ],
          "operator": "OR"
        }
      ]
    }
  ],
  "vendorComments": [
    {
      "comment": "Not vulnerable.  There is no support for jffs2 in the Linux kernel as distributed with Red Hat Enterprise Linux 2.1 or 3.  There is no ACL support for jffs2 in the Linux kernel as distributed with Red Hat Enterprise Linux 4 or 5.",
      "lastModified": "2007-10-10T00:00:00",
      "organization": "Red Hat"
    }
  ],
  "sourceIdentifier": "cve@mitre.org"
}