CVE-2011-2536

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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": "2026-06-16T23:31:33.883", "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": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-200"}], "source": "nvd@nist.gov", "type": "Primary"}]}

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