FKIE_CVE-2007-3731

Vulnerability from fkie_nvd - Published: 2007-09-17 17:17 - Updated: 2026-06-16 22:42
Severity
Summary
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.
References
secalert@redhat.comhttp://bugzilla.kernel.org/show_bug.cgi?id=8765Exploit
secalert@redhat.comhttp://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commitdiff%3Bh=29eb51101c02df517ca64ec472d7501127ad1da8
secalert@redhat.comhttp://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commitdiff%3Bh=a10d9a71bafd3a283da240d2868e71346d2aef6f
secalert@redhat.comhttp://osvdb.org/37286
secalert@redhat.comhttp://secunia.com/advisories/26935
secalert@redhat.comhttp://secunia.com/advisories/26955
secalert@redhat.comhttp://secunia.com/advisories/26978
secalert@redhat.comhttp://secunia.com/advisories/27322
secalert@redhat.comhttp://secunia.com/advisories/29159
secalert@redhat.comhttp://wiki.rpath.com/wiki/Advisories:rPSA-2008-0094
secalert@redhat.comhttp://www.debian.org/security/2007/dsa-1378
secalert@redhat.comhttp://www.redhat.com/support/errata/RHSA-2007-0940.html
secalert@redhat.comhttp://www.securityfocus.com/archive/1/488972/100/0/threaded
secalert@redhat.comhttp://www.securityfocus.com/bid/25801
secalert@redhat.comhttp://www.ubuntu.com/usn/usn-518-1
secalert@redhat.comhttps://bugzilla.redhat.com/show_bug.cgi?id=248324Patch
secalert@redhat.comhttps://issues.rpath.com/browse/RPL-2304
secalert@redhat.comhttps://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A10394
af854a3a-2127-422b-91ae-364da2661108http://bugzilla.kernel.org/show_bug.cgi?id=8765Exploit
af854a3a-2127-422b-91ae-364da2661108http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commitdiff%3Bh=29eb51101c02df517ca64ec472d7501127ad1da8
af854a3a-2127-422b-91ae-364da2661108http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commitdiff%3Bh=a10d9a71bafd3a283da240d2868e71346d2aef6f
af854a3a-2127-422b-91ae-364da2661108http://osvdb.org/37286
af854a3a-2127-422b-91ae-364da2661108http://secunia.com/advisories/26935
af854a3a-2127-422b-91ae-364da2661108http://secunia.com/advisories/26955
af854a3a-2127-422b-91ae-364da2661108http://secunia.com/advisories/26978
af854a3a-2127-422b-91ae-364da2661108http://secunia.com/advisories/27322
af854a3a-2127-422b-91ae-364da2661108http://secunia.com/advisories/29159
af854a3a-2127-422b-91ae-364da2661108http://wiki.rpath.com/wiki/Advisories:rPSA-2008-0094
af854a3a-2127-422b-91ae-364da2661108http://www.debian.org/security/2007/dsa-1378
af854a3a-2127-422b-91ae-364da2661108http://www.redhat.com/support/errata/RHSA-2007-0940.html
af854a3a-2127-422b-91ae-364da2661108http://www.securityfocus.com/archive/1/488972/100/0/threaded
af854a3a-2127-422b-91ae-364da2661108http://www.securityfocus.com/bid/25801
af854a3a-2127-422b-91ae-364da2661108http://www.ubuntu.com/usn/usn-518-1
af854a3a-2127-422b-91ae-364da2661108https://bugzilla.redhat.com/show_bug.cgi?id=248324Patch
af854a3a-2127-422b-91ae-364da2661108https://issues.rpath.com/browse/RPL-2304
af854a3a-2127-422b-91ae-364da2661108https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A10394
Impacted products
Vendor Product Version
linux linux_kernel 2.6.20
linux linux_kernel 2.6.21
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "n/a",
          "vendor": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "n/a"
            }
          ]
        }
      ],
      "source": "secalert@redhat.com"
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "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",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "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."
    }
  ],
  "id": "CVE-2007-3731",
  "lastModified": "2026-06-16T22:42:36.833",
  "metrics": {
    "cvssMetricV2": [
      {
        "acInsufInfo": false,
        "baseSeverity": "MEDIUM",
        "cvssData": {
          "accessComplexity": "LOW",
          "accessVector": "LOCAL",
          "authentication": "NONE",
          "availabilityImpact": "COMPLETE",
          "baseScore": 4.9,
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "vectorString": "AV:L/AC:L/Au:N/C:N/I:N/A:C",
          "version": "2.0"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 6.9,
        "obtainAllPrivilege": false,
        "obtainOtherPrivilege": false,
        "obtainUserPrivilege": false,
        "source": "nvd@nist.gov",
        "type": "Primary",
        "userInteractionRequired": false
      }
    ]
  },
  "published": "2007-09-17T17:17:00.000",
  "references": [
    {
      "source": "secalert@redhat.com",
      "tags": [
        "Exploit"
      ],
      "url": "http://bugzilla.kernel.org/show_bug.cgi?id=8765"
    },
    {
      "source": "secalert@redhat.com",
      "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://osvdb.org/37286"
    },
    {
      "source": "secalert@redhat.com",
      "url": "http://secunia.com/advisories/26935"
    },
    {
      "source": "secalert@redhat.com",
      "url": "http://secunia.com/advisories/26955"
    },
    {
      "source": "secalert@redhat.com",
      "url": "http://secunia.com/advisories/26978"
    },
    {
      "source": "secalert@redhat.com",
      "url": "http://secunia.com/advisories/27322"
    },
    {
      "source": "secalert@redhat.com",
      "url": "http://secunia.com/advisories/29159"
    },
    {
      "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",
      "tags": [
        "Patch"
      ],
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=248324"
    },
    {
      "source": "secalert@redhat.com",
      "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": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Exploit"
      ],
      "url": "http://bugzilla.kernel.org/show_bug.cgi?id=8765"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "url": "http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commitdiff%3Bh=29eb51101c02df517ca64ec472d7501127ad1da8"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "url": "http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commitdiff%3Bh=a10d9a71bafd3a283da240d2868e71346d2aef6f"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "url": "http://osvdb.org/37286"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "url": "http://secunia.com/advisories/26935"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "url": "http://secunia.com/advisories/26955"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "url": "http://secunia.com/advisories/26978"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "url": "http://secunia.com/advisories/27322"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "url": "http://secunia.com/advisories/29159"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "url": "http://wiki.rpath.com/wiki/Advisories:rPSA-2008-0094"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "url": "http://www.debian.org/security/2007/dsa-1378"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "url": "http://www.redhat.com/support/errata/RHSA-2007-0940.html"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "url": "http://www.securityfocus.com/archive/1/488972/100/0/threaded"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "url": "http://www.securityfocus.com/bid/25801"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "url": "http://www.ubuntu.com/usn/usn-518-1"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Patch"
      ],
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=248324"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "url": "https://issues.rpath.com/browse/RPL-2304"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "url": "https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A10394"
    }
  ],
  "sourceIdentifier": "secalert@redhat.com",
  "vendorComments": [
    {
      "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",
      "organization": "Red Hat"
    }
  ],
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-20"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}



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