FKIE_CVE-2006-7226

Vulnerability from fkie_nvd - Published: 2007-12-03 20:46 - Updated: 2026-06-16 22:34
Severity
Summary
Perl-Compatible Regular Expression (PCRE) library before 6.7 does not properly calculate the compiled memory allocation for regular expressions that involve a quantified "subpattern containing a named recursion or subroutine reference," which allows context-dependent attackers to cause a denial of service (error or crash).
References
secalert@redhat.comhttp://lists.opensuse.org/opensuse-security-announce/2008-01/msg00006.html
secalert@redhat.comhttp://secunia.com/advisories/28041
secalert@redhat.comhttp://secunia.com/advisories/28658
secalert@redhat.comhttp://support.avaya.com/elmodocs2/security/ASA-2007-505.htm
secalert@redhat.comhttp://www.mandriva.com/security/advisories?name=MDVSA-2008:030
secalert@redhat.comhttp://www.pcre.org/changelog.txt
secalert@redhat.comhttp://www.redhat.com/support/errata/RHSA-2007-1059.html
secalert@redhat.comhttp://www.redhat.com/support/errata/RHSA-2007-1068.html
secalert@redhat.comhttp://www.securityfocus.com/bid/26727
secalert@redhat.comhttps://bugzilla.redhat.com/show_bug.cgi?id=384781
secalert@redhat.comhttps://exchange.xforce.ibmcloud.com/vulnerabilities/40020
secalert@redhat.comhttps://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A11545
af854a3a-2127-422b-91ae-364da2661108http://lists.opensuse.org/opensuse-security-announce/2008-01/msg00006.html
af854a3a-2127-422b-91ae-364da2661108http://secunia.com/advisories/28041
af854a3a-2127-422b-91ae-364da2661108http://secunia.com/advisories/28658
af854a3a-2127-422b-91ae-364da2661108http://support.avaya.com/elmodocs2/security/ASA-2007-505.htm
af854a3a-2127-422b-91ae-364da2661108http://www.mandriva.com/security/advisories?name=MDVSA-2008:030
af854a3a-2127-422b-91ae-364da2661108http://www.pcre.org/changelog.txt
af854a3a-2127-422b-91ae-364da2661108http://www.redhat.com/support/errata/RHSA-2007-1059.html
af854a3a-2127-422b-91ae-364da2661108http://www.redhat.com/support/errata/RHSA-2007-1068.html
af854a3a-2127-422b-91ae-364da2661108http://www.securityfocus.com/bid/26727
af854a3a-2127-422b-91ae-364da2661108https://bugzilla.redhat.com/show_bug.cgi?id=384781
af854a3a-2127-422b-91ae-364da2661108https://exchange.xforce.ibmcloud.com/vulnerabilities/40020
af854a3a-2127-422b-91ae-364da2661108https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A11545
Impacted products
Vendor Product Version
redhat enterprise_linux_desktop 4.0
redhat enterprise_linux 4.0
redhat enterprise_linux 4.0
redhat enterprise_linux 4.0
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:redhat:enterprise_linux_desktop:4.0:*:*:*:*:*:*:*",
              "matchCriteriaId": "7D74A418-50F0-42C0-ABBC-BBBE718FF025",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    },
    {
      "nodes": [
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          "cpeMatch": [
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              "matchCriteriaId": "49EF5B77-9BC9-4AE8-A677-48E5E576BE63",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:redhat:enterprise_linux:4.0:*:es:*:*:*:*:*",
              "matchCriteriaId": "36389D32-61C1-4487-8399-FA7D2864FACD",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:redhat:enterprise_linux:4.0:*:ws:*:*:*:*:*",
              "matchCriteriaId": "49B67F74-AF8F-4A27-AA8A-A8479E256A9F",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Perl-Compatible Regular Expression (PCRE) library before 6.7 does not properly calculate the compiled memory allocation for regular expressions that involve a quantified \"subpattern containing a named recursion or subroutine reference,\" which allows context-dependent attackers to cause a denial of service (error or crash)."
    },
    {
      "lang": "es",
      "value": "La biblioteca Perl-Compatible Regular Expression (PCRE) versiones anteriores a 6.7 no calcula apropiadamente la ubicaci\u00f3n de memoria compilada para expresiones regulares que involucran un \"subpatr\u00f3n conteniendo un recursi\u00f3n nombrada \u00f3 referencia a subrutina\" cuantificado, lo cual permite a atacantes locales o remotos dependientes del contexto provocar una denegaci\u00f3n de servicio (error o ca\u00edda)"
    }
  ],
  "id": "CVE-2006-7226",
  "lastModified": "2026-06-16T22:34:36.860",
  "metrics": {
    "cvssMetricV2": [
      {
        "acInsufInfo": false,
        "baseSeverity": "MEDIUM",
        "cvssData": {
          "accessComplexity": "MEDIUM",
          "accessVector": "NETWORK",
          "authentication": "NONE",
          "availabilityImpact": "PARTIAL",
          "baseScore": 4.3,
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "vectorString": "AV:N/AC:M/Au:N/C:N/I:N/A:P",
          "version": "2.0"
        },
        "exploitabilityScore": 8.6,
        "impactScore": 2.9,
        "obtainAllPrivilege": false,
        "obtainOtherPrivilege": false,
        "obtainUserPrivilege": false,
        "source": "nvd@nist.gov",
        "type": "Primary",
        "userInteractionRequired": false
      }
    ]
  },
  "published": "2007-12-03T20:46:00.000",
  "references": [
    {
      "source": "secalert@redhat.com",
      "url": "http://lists.opensuse.org/opensuse-security-announce/2008-01/msg00006.html"
    },
    {
      "source": "secalert@redhat.com",
      "url": "http://secunia.com/advisories/28041"
    },
    {
      "source": "secalert@redhat.com",
      "url": "http://secunia.com/advisories/28658"
    },
    {
      "source": "secalert@redhat.com",
      "url": "http://support.avaya.com/elmodocs2/security/ASA-2007-505.htm"
    },
    {
      "source": "secalert@redhat.com",
      "url": "http://www.mandriva.com/security/advisories?name=MDVSA-2008:030"
    },
    {
      "source": "secalert@redhat.com",
      "url": "http://www.pcre.org/changelog.txt"
    },
    {
      "source": "secalert@redhat.com",
      "url": "http://www.redhat.com/support/errata/RHSA-2007-1059.html"
    },
    {
      "source": "secalert@redhat.com",
      "url": "http://www.redhat.com/support/errata/RHSA-2007-1068.html"
    },
    {
      "source": "secalert@redhat.com",
      "url": "http://www.securityfocus.com/bid/26727"
    },
    {
      "source": "secalert@redhat.com",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=384781"
    },
    {
      "source": "secalert@redhat.com",
      "url": "https://exchange.xforce.ibmcloud.com/vulnerabilities/40020"
    },
    {
      "source": "secalert@redhat.com",
      "url": "https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A11545"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "url": "http://lists.opensuse.org/opensuse-security-announce/2008-01/msg00006.html"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "url": "http://secunia.com/advisories/28041"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "url": "http://secunia.com/advisories/28658"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "url": "http://support.avaya.com/elmodocs2/security/ASA-2007-505.htm"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "url": "http://www.mandriva.com/security/advisories?name=MDVSA-2008:030"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "url": "http://www.pcre.org/changelog.txt"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "url": "http://www.redhat.com/support/errata/RHSA-2007-1059.html"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "url": "http://www.redhat.com/support/errata/RHSA-2007-1068.html"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "url": "http://www.securityfocus.com/bid/26727"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=384781"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "url": "https://exchange.xforce.ibmcloud.com/vulnerabilities/40020"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "url": "https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A11545"
    }
  ],
  "sourceIdentifier": "secalert@redhat.com",
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "NVD-CWE-Other"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.