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via a crafted nickname that is not properly handled in a WHO response."}, {"lang": "es", "value": "La funci\u00f3n irc_msg_who en msgs.c en el plugin del protocolo IRC en libpurple v2.8.0 hasta v2.9.0 en Pidgin anterior a v2.10.0 no valida adecuadamente caracteres en nombres de usuario, lo que permite a atacantes remotos asistidos por el usuario provocar una denegaci\u00f3n de servicio (desreferenciar un puntero NULL y ca\u00edda de la aplicaci\u00f3n) a trav\u00e9s del nombre de usuario que no se maneja adecuadamente en una respuesta WHO."}], "evaluatorComment": "Per: http://cwe.mitre.org/data/definitions/476.html\r\n'CWE-476: NULL Pointer Dereference'", "id": "CVE-2011-2943", "lastModified": "2024-11-21T01:29:19.757", "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": true}]}, "published": "2011-08-29T17:55:00.957", "references": [{"source": "secalert@redhat.com", "tags": ["Patch"], "url": "http://developer.pidgin.im/viewmtn/revision/diff/5749f9193063800d27bef75c2388f6f9cc2f7f37/with/5c2dba4a7e2e76b76e7f472b88953a4316706d43/libpurple/protocols/irc/msgs.c"}, {"source": "secalert@redhat.com", "tags": ["Patch"], "url": "http://developer.pidgin.im/viewmtn/revision/info/5c2dba4a7e2e76b76e7f472b88953a4316706d43"}, {"source": "secalert@redhat.com", "tags": ["Patch", "Vendor Advisory"], "url": "http://pidgin.im/news/security/?id=53"}, {"source": "secalert@redhat.com", "tags": ["Vendor Advisory"], "url": "http://secunia.com/advisories/45663"}, {"source": 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{"acknowledgement": "Red Hat would like to thank Pidgin project for reporting this issue.", "bugzilla": {"description": "pidgin: Crash in IRC protocol plug-in by listing set of users (/who command) upon session startup", "id": "722939", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=722939"}, "csaw": false, "cvss": {"cvss_base_score": "4.0", "cvss_scoring_vector": "AV:N/AC:L/Au:S/C:N/I:N/A:P", "status": "draft"}, "details": ["The irc_msg_who function in msgs.c in the IRC protocol plugin in libpurple 2.8.0 through 2.9.0 in Pidgin before 2.10.0 does not properly validate characters in nicknames, which allows user-assisted remote attackers to cause a denial of service (NULL pointer dereference and application crash) via a crafted nickname that is not properly handled in a WHO response."], "name": "CVE-2011-2943", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:4", "fix_state": "Not affected", "package_name": "pidgin", "product_name": "Red Hat Enterprise Linux 4"}, {"cpe": "cpe:/o:redhat:enterprise_linux:5", "fix_state": "Not affected", "package_name": "pidgin", "product_name": "Red Hat Enterprise Linux 5"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "pidgin", "product_name": "Red Hat Enterprise Linux 6"}], "public_date": "2011-07-20T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2011-2943\nhttps://nvd.nist.gov/vuln/detail/CVE-2011-2943"], "statement": "Not vulnerable. This issue did not affect the versions of pidgin as\nshipped with Red Hat Enterprise Linux 4, 5, or 6 as they contained a version of pidgin that did not support /who IRC protocol command.", "threat_severity": "Low"}