FKIE_CVE-2009-2726

Vulnerability from fkie_nvd - Published: 2009-08-12 10:30 - Updated: 2025-04-09 00:30
Severity ?
Summary
The SIP channel driver in Asterisk Open Source 1.2.x before 1.2.34, 1.4.x before 1.4.26.1, 1.6.0.x before 1.6.0.12, and 1.6.1.x before 1.6.1.4; Asterisk Business Edition A.x.x, B.x.x before B.2.5.9, C.2.x before C.2.4.1, and C.3.x before C.3.1; and Asterisk Appliance s800i 1.2.x before 1.3.0.3 does not use a maximum width when invoking sscanf style functions, which allows remote attackers to cause a denial of service (stack memory consumption) via SIP packets containing large sequences of ASCII decimal characters, as demonstrated via vectors related to (1) the CSeq value in a SIP header, (2) large Content-Length value, and (3) SDP.
References
cve@mitre.orghttp://downloads.digium.com/pub/security/AST-2009-005.htmlProduct
cve@mitre.orghttp://labs.mudynamics.com/advisories/MU-200908-01.txtBroken Link
cve@mitre.orghttp://secunia.com/advisories/36227Broken Link, Vendor Advisory
cve@mitre.orghttp://www.securityfocus.com/archive/1/505669/100/0/threadedBroken Link, Third Party Advisory, VDB Entry
cve@mitre.orghttp://www.securityfocus.com/bid/36015Broken Link, Exploit, Third Party Advisory, VDB Entry
cve@mitre.orghttp://www.securitytracker.com/id?1022705Broken Link, Third Party Advisory, VDB Entry
cve@mitre.orghttp://www.vupen.com/english/advisories/2009/2229Broken Link, Vendor Advisory
af854a3a-2127-422b-91ae-364da2661108http://downloads.digium.com/pub/security/AST-2009-005.htmlProduct
af854a3a-2127-422b-91ae-364da2661108http://labs.mudynamics.com/advisories/MU-200908-01.txtBroken Link
af854a3a-2127-422b-91ae-364da2661108http://secunia.com/advisories/36227Broken Link, Vendor Advisory
af854a3a-2127-422b-91ae-364da2661108http://www.securityfocus.com/archive/1/505669/100/0/threadedBroken Link, Third Party Advisory, VDB Entry
af854a3a-2127-422b-91ae-364da2661108http://www.securityfocus.com/bid/36015Broken Link, Exploit, Third Party Advisory, VDB Entry
af854a3a-2127-422b-91ae-364da2661108http://www.securitytracker.com/id?1022705Broken Link, Third Party Advisory, VDB Entry
af854a3a-2127-422b-91ae-364da2661108http://www.vupen.com/english/advisories/2009/2229Broken Link, Vendor Advisory
Impacted products
Vendor Product Version
digium asterisk *
digium asterisk *
digium asterisk *
digium s800i_firmware *
digium s800i -
digium asterisk *
digium asterisk *
digium asterisk *
digium asterisk *
To clipboard 

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  "cveTags": [],
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      "value": "The SIP channel driver in Asterisk Open Source 1.2.x before 1.2.34, 1.4.x before 1.4.26.1, 1.6.0.x before 1.6.0.12, and 1.6.1.x before 1.6.1.4; Asterisk Business Edition A.x.x, B.x.x before B.2.5.9, C.2.x before C.2.4.1, and C.3.x before C.3.1; and Asterisk Appliance s800i 1.2.x before 1.3.0.3 does not use a maximum width when invoking sscanf style functions, which allows remote attackers to cause a denial of service (stack memory consumption) via SIP packets containing large sequences of ASCII decimal characters, as demonstrated via vectors related to (1) the CSeq value in a SIP header, (2) large Content-Length value, and (3) SDP."
    },
    {
      "lang": "es",
      "value": "El driver SIP channel en Asterisk Open Source v1.2.x anterior a v1.2.34, v1.4.x anterior a v1.4.26.1, v1.6.0.x anterior a v1.6.0.12, y v1.6.1.x anterior a v1.6.1.4; Asterisk Business Edition vA.x.x, vB.x.x anterior a vB.2.5.9, vC.2.x anterior a vC.2.4.1, y vC.3.x anterior a vC.3.1; y Asterisk Appliance s800i v1.2.x anterior a v1.3.0.3, no utiliza el ancho m\u00e1ximo cuando se invocan las funciones de estilo sscanf, lo que permite a atacantes remotos producir una denegaci\u00f3n de servicio (agotamiento de la pila de memoria) a trav\u00e9s de paquetes SIP que contienen secuencias largas de caracteres ASCII decimales, como se demostr\u00f3 a trav\u00e9s de vectores relacionados con (1) el valor CSeq en una cabecera SIP, (2) valores  Content-Length, y (3) SDP."
    }
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  "id": "CVE-2009-2726",
  "lastModified": "2025-04-09T00:30:58.490",
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        "baseSeverity": "HIGH",
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          "accessVector": "NETWORK",
          "authentication": "NONE",
          "availabilityImpact": "COMPLETE",
          "baseScore": 7.8,
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "vectorString": "AV:N/AC:L/Au:N/C:N/I:N/A:C",
          "version": "2.0"
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        "impactScore": 6.9,
        "obtainAllPrivilege": false,
        "obtainOtherPrivilege": false,
        "obtainUserPrivilege": false,
        "source": "nvd@nist.gov",
        "type": "Primary",
        "userInteractionRequired": false
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  "published": "2009-08-12T10:30:01.110",
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          "value": "CWE-770"
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}


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  • 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.
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Detection rules are retrieved from Rulezet.