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"matchCriteriaId": "78E8936C-033B-49E6-BB39-D5BBBC80EB55", "vulnerable": true}, {"criteria": "cpe:2.3:a:digium:asterisk:c.3.1.0:-:business:*:*:*:*:*", "matchCriteriaId": "5D05D04F-CD6C-4A73-885C-306D7A5CC7C4", "vulnerable": true}, {"criteria": "cpe:2.3:a:digium:asterisk:c.3.1.1:-:business:*:*:*:*:*", "matchCriteriaId": "3805B5F3-A4CD-469F-9F8A-A271A79A2B7C", "vulnerable": true}, {"criteria": "cpe:2.3:a:digium:asterisk:c.3.2.2:-:business:*:*:*:*:*", "matchCriteriaId": "9FAEBE5E-378A-40DC-B2B9-31F6D1305BCE", "vulnerable": true}, {"criteria": "cpe:2.3:a:digium:asterisk:c.3.2.3:-:business:*:*:*:*:*", "matchCriteriaId": "617B3FE8-39E3-41C0-9348-9507DA43DE93", "vulnerable": true}, {"criteria": "cpe:2.3:a:digium:asterisk:c.3.3.2:-:business:*:*:*:*:*", "matchCriteriaId": "04AB4C82-71BB-49B7-B4F3-4E75EFB5F1A6", "vulnerable": true}, {"criteria": "cpe:2.3:a:digium:asterisk:c.3.6.2:-:business:*:*:*:*:*", "matchCriteriaId": "78B55176-E269-411B-974A-B5D2CE8E08C2", "vulnerable": true}, {"criteria": "cpe:2.3:a:digium:asterisk:c.3.6.3:-:business:*:*:*:*:*", "matchCriteriaId": "9BCF12B0-4B8D-499D-B5DE-FB0CD9EEC3B4", "vulnerable": true}, {"criteria": "cpe:2.3:a:digium:asterisk:c.3.6.4:-:business:*:*:*:*:*", "matchCriteriaId": "9ED68059-F0E5-4B1B-B633-466D92F38346", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "chan_sip.c in the SIP channel driver in Asterisk Open Source 1.4.x before 1.4.41.2, 1.6.2.x before 1.6.2.18.2, and 1.8.x before 1.8.4.4, and Asterisk Business Edition C.3.x before C.3.7.3, disregards the alwaysauthreject option and generates different responses for invalid SIP requests depending on whether the user account exists, which allows remote attackers to enumerate account names via a series of requests."}, {"lang": "es", "value": "chan_sip.c en el controlador de canal SIP en Asterisk Open Source v1.4.x anteriores a v1.4.41.2, v1.6.2.x anteriores a v1.6.2.18.2, y v1.8.x anteriores a v1.8.4.4, y Asterisk Business Edition vC.3.x anteriores a vC.3.7.3,no tiene en cuenta la opci\u00f3n alwaysauthreject y genera diferentes respuestas no v\u00e1lidas para solicitudes SIP en funci\u00f3n de si la cuenta de usuario existe, lo que permite a atacantes remotos enumerar los nombres de cuenta a trav\u00e9s de una serie de peticiones."}], "id": "CVE-2011-2536", "lastModified": "2025-04-11T00:51:21.963", "metrics": {"cvssMetricV2": [{"acInsufInfo": false, "baseSeverity": "MEDIUM", "cvssData": {"accessComplexity": "LOW", "accessVector": "NETWORK", "authentication": "NONE", "availabilityImpact": "NONE", "baseScore": 5.0, "confidentialityImpact": "PARTIAL", "integrityImpact": "NONE", "vectorString": "AV:N/AC:L/Au:N/C:P/I:N/A:N", "version": "2.0"}, "exploitabilityScore": 10.0, "impactScore": 2.9, "obtainAllPrivilege": false, "obtainOtherPrivilege": false, "obtainUserPrivilege": false, "source": "nvd@nist.gov", "type": "Primary", "userInteractionRequired": false}]}, "published": "2011-07-06T19:55:03.543", "references": [{"source": "cve@mitre.org", "tags": ["Patch"], "url": "http://downloads.asterisk.org/pub/security/AST-2011-011-1.8.diff"}, {"source": "cve@mitre.org", "tags": ["Vendor Advisory"], "url": "http://downloads.asterisk.org/pub/security/AST-2011-011.html"}, {"source": "cve@mitre.org", "url": "http://www.securitytracker.com/id?1025734"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "http://downloads.asterisk.org/pub/security/AST-2011-011-1.8.diff"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Vendor Advisory"], "url": "http://downloads.asterisk.org/pub/security/AST-2011-011.html"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "http://www.securitytracker.com/id?1025734"}], "sourceIdentifier": "cve@mitre.org", "vulnStatus": "Deferred", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-200"}], "source": "nvd@nist.gov", "type": "Primary"}]}

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