CVE-2009-2726

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{"affected": [{"affectedData": [{"product": "n/a", "vendor": "n/a", "versions": [{"status": "affected", "version": "n/a"}]}], "source": "cve@mitre.org"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:digium:asterisk:*:*:business:*:*:*:*:*", "matchCriteriaId": "C7DBF0A2-9606-43EF-88E6-905B4864D377", "versionEndExcluding": "b.2.5.9", "vulnerable": true}, {"criteria": "cpe:2.3:a:digium:asterisk:*:*:business:*:*:*:*:*", "matchCriteriaId": "945FA0F6-42A8-4AF4-9EF6-4B16D08B2724", "versionEndIncluding": "c.2.4.1", "versionStartIncluding": "c.2.0", "vulnerable": true}, {"criteria": "cpe:2.3:a:digium:asterisk:*:*:business:*:*:*:*:*", "matchCriteriaId": "7375080A-38B8-4230-875B-FC6184F23792", "versionEndExcluding": "c.3.1", "versionStartIncluding": "c.3.0", "vulnerable": true}], "negate": false, "operator": "OR"}]}, {"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:digium:s800i_firmware:*:*:*:*:*:*:*:*", "matchCriteriaId": "3E7FEE3E-B19C-4E7E-92D6-D0032A5DAA59", "versionEndExcluding": "1.3.0.3", "versionStartIncluding": "1.2.0", "vulnerable": true}], "negate": false, "operator": "OR"}, {"cpeMatch": [{"criteria": "cpe:2.3:h:digium:s800i:-:*:*:*:*:*:*:*", "matchCriteriaId": "15C35F93-0E57-4AEB-AA5F-4EDFAE753451", "vulnerable": false}], "negate": false, "operator": "OR"}], "operator": "AND"}, {"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:digium:asterisk:*:*:*:*:*:*:*:*", "matchCriteriaId": "86564062-C367-4652-820A-7B4700011463", "versionEndExcluding": "1.2.34", "versionStartIncluding": "1.2.0", "vulnerable": true}, {"criteria": "cpe:2.3:a:digium:asterisk:*:*:*:*:*:*:*:*", "matchCriteriaId": "2CD3CE8A-7145-4501-A61A-D29F575E8795", "versionEndExcluding": "1.4.26.1", "versionStartIncluding": "1.4.0", "vulnerable": true}, {"criteria": "cpe:2.3:a:digium:asterisk:*:*:*:*:*:*:*:*", "matchCriteriaId": "9E6BB86F-2FC7-4830-AC2E-4F114D87FE4C", "versionEndExcluding": "1.6.0.12", "versionStartIncluding": "1.6.0", "vulnerable": true}, {"criteria": "cpe:2.3:a:digium:asterisk:*:*:*:*:*:*:*:*", "matchCriteriaId": "A4DBF98F-EF1D-4DC0-93FE-2EC280AAA5EF", "versionEndExcluding": "1.6.1.4", "versionStartIncluding": "1.6.1", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "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."}], "id": "CVE-2009-2726", "lastModified": "2026-06-16T23:10:06.930", "metrics": {"cvssMetricV2": [{"acInsufInfo": false, "baseSeverity": "HIGH", "cvssData": {"accessComplexity": "LOW", "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"}, "exploitabilityScore": 10.0, "impactScore": 6.9, "obtainAllPrivilege": false, "obtainOtherPrivilege": false, "obtainUserPrivilege": false, "source": "nvd@nist.gov", "type": "Primary", "userInteractionRequired": false}]}, "published": "2009-08-12T10:30:01.110", "references": [{"source": "cve@mitre.org", "tags": ["Product"], "url": "http://downloads.digium.com/pub/security/AST-2009-005.html"}, {"source": "cve@mitre.org", "tags": ["Broken Link"], "url": "http://labs.mudynamics.com/advisories/MU-200908-01.txt"}, {"source": "cve@mitre.org", "tags": ["Broken Link", "Vendor Advisory"], "url": "http://secunia.com/advisories/36227"}, {"source": "cve@mitre.org", "tags": ["Broken Link", "Third Party Advisory", "VDB Entry"], "url": "http://www.securityfocus.com/archive/1/505669/100/0/threaded"}, {"source": "cve@mitre.org", "tags": ["Broken Link", "Exploit", "Third Party Advisory", "VDB Entry"], "url": "http://www.securityfocus.com/bid/36015"}, {"source": "cve@mitre.org", "tags": ["Broken Link", "Third Party Advisory", "VDB Entry"], "url": "http://www.securitytracker.com/id?1022705"}, {"source": "cve@mitre.org", "tags": ["Broken Link", "Vendor Advisory"], "url": "http://www.vupen.com/english/advisories/2009/2229"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Product"], "url": "http://downloads.digium.com/pub/security/AST-2009-005.html"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Broken Link"], "url": "http://labs.mudynamics.com/advisories/MU-200908-01.txt"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Broken Link", "Vendor Advisory"], "url": "http://secunia.com/advisories/36227"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Broken Link", "Third Party Advisory", "VDB Entry"], "url": "http://www.securityfocus.com/archive/1/505669/100/0/threaded"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Broken Link", "Exploit", "Third Party Advisory", "VDB Entry"], "url": "http://www.securityfocus.com/bid/36015"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Broken Link", "Third Party Advisory", "VDB Entry"], "url": "http://www.securitytracker.com/id?1022705"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Broken Link", "Vendor Advisory"], "url": "http://www.vupen.com/english/advisories/2009/2229"}], "sourceIdentifier": "cve@mitre.org", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-770"}], "source": "nvd@nist.gov", "type": "Primary"}]}

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