{
  "id": "CVE-2007-3731",
  "sourceIdentifier": "secalert@redhat.com",
  "published": "2007-09-17T17:17:00.000",
  "lastModified": "2023-02-13T02:18:02.567",
  "vulnStatus": "Modified",
  "descriptions": [
    {
      "lang": "en",
      "value": "The Linux kernel 2.6.20 and 2.6.21 does not properly handle an invalid LDT segment selector in %cs (the xcs field) during ptrace single-step operations, which allows local users to cause a denial of service (NULL dereference and OOPS) via certain code that makes ptrace PTRACE_SETREGS and PTRACE_SINGLESTEP requests, related to the TRACE_IRQS_ON function, and possibly related to the arch_ptrace function."
    },
    {
      "lang": "es",
      "value": "El kernel de Linux 2.6.20 y 2.6.21 no maneja de forma adecuada un segmento de selecci\u00f3n LDT no v\u00e1lido en %cs (el campo xcs)a lo largo de las operaciones paso-simple ptrace, lo caul permite a usuarios loalces provocar denegaci\u00f3n de servicio (referencia NULL y OOPS) a trav\u00e9s de ciertos c\u00f3digos que realizan las respuestas ptrace PTRACE_SETREGS y PTRACE_SINGLESTEP, relacionado con la funci\u00f3n TRACE_IRQS_ON, y posiblemente relacionado con la funci\u00f3n arch_ptrace."
    }
  ],
  "vendorComments": [
    {
      "organization": "Red Hat",
      "comment": "This issue did not affect the versions of the Linux kernel as shipped with Red Hat Enterprise Linux 2.1, 3, or 4.",
      "lastModified": "2007-10-18T00:00:00"
    }
  ],
  "metrics": {
    "cvssMetricV2": [
      {
        "source": "nvd@nist.gov",
        "type": "Primary",
        "cvssData": {
          "version": "2.0",
          "vectorString": "AV:L/AC:L/Au:N/C:N/I:N/A:C",
          "accessVector": "LOCAL",
          "accessComplexity": "LOW",
          "authentication": "NONE",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "availabilityImpact": "COMPLETE",
          "baseScore": 4.9
        },
        "baseSeverity": "MEDIUM",
        "exploitabilityScore": 3.9,
        "impactScore": 6.9,
        "acInsufInfo": false,
        "obtainAllPrivilege": false,
        "obtainUserPrivilege": false,
        "obtainOtherPrivilege": false,
        "userInteractionRequired": false
      }
    ]
  },
  "weaknesses": [
    {
      "source": "nvd@nist.gov",
      "type": "Primary",
      "description": [
        {
          "lang": "en",
          "value": "CWE-20"
        }
      ]
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "operator": "OR",
          "negate": false,
          "cpeMatch": [
            {
              "vulnerable": true,
              "criteria": "cpe:2.3:o:linux:linux_kernel:2.6.20:*:*:*:*:*:*:*",
              "matchCriteriaId": "C6940324-0383-4510-BA55-770E0A6B80B7"
            },
            {
              "vulnerable": true,
              "criteria": "cpe:2.3:o:linux:linux_kernel:2.6.21:*:*:*:*:*:*:*",
              "matchCriteriaId": "50B422D1-6C6E-4359-A169-3EED78A1CF40"
            }
          ]
        }
      ]
    }
  ],
  "references": [
    {
      "url": "http://bugzilla.kernel.org/show_bug.cgi?id=8765",
      "source": "secalert@redhat.com",
      "tags": [
        "Exploit"
      ]
    },
    {
      "url": "http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commitdiff%3Bh=29eb51101c02df517ca64ec472d7501127ad1da8",
      "source": "secalert@redhat.com"
    },
    {
      "url": "http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commitdiff%3Bh=a10d9a71bafd3a283da240d2868e71346d2aef6f",
      "source": "secalert@redhat.com"
    },
    {
      "url": "http://wiki.rpath.com/wiki/Advisories:rPSA-2008-0094",
      "source": "secalert@redhat.com"
    },
    {
      "url": "http://www.debian.org/security/2007/dsa-1378",
      "source": "secalert@redhat.com"
    },
    {
      "url": "http://www.redhat.com/support/errata/RHSA-2007-0940.html",
      "source": "secalert@redhat.com"
    },
    {
      "url": "http://www.securityfocus.com/archive/1/488972/100/0/threaded",
      "source": "secalert@redhat.com"
    },
    {
      "url": "http://www.securityfocus.com/bid/25801",
      "source": "secalert@redhat.com"
    },
    {
      "url": "http://www.ubuntu.com/usn/usn-518-1",
      "source": "secalert@redhat.com"
    },
    {
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=248324",
      "source": "secalert@redhat.com",
      "tags": [
        "Patch"
      ]
    },
    {
      "url": "https://issues.rpath.com/browse/RPL-2304",
      "source": "secalert@redhat.com"
    },
    {
      "url": "https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A10394",
      "source": "secalert@redhat.com"
    }
  ]
}