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{"configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:cypherpunks:libotr:*:*:*:*:*:*:*:*", "matchCriteriaId": "16FB55F1-A4DA-48A8-A7B9-8ADA15F28F20", "versionEndIncluding": "3.2.0", "vulnerable": true}, {"criteria": "cpe:2.3:a:cypherpunks:libotr:3.1.0:*:*:*:*:*:*:*", "matchCriteriaId": "917BC37B-B3B5-4802-BF1C-96F1893AC68F", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "The (1) otrl_base64_otr_decode function in src/b64.c; (2) otrl_proto_data_read_flags and (3) otrl_proto_accept_data functions in src/proto.c; and (4) decode function in toolkit/parse.c in libotr before 3.2.1 allocates a zero-length buffer when decoding a base64 string, which allows remote attackers to cause a denial of service (application crash) via a message with the value \"?OTR:===.\", which triggers a heap-based buffer overflow."}, {"lang": "es", "value": "La funci\u00f3n (1) otrl_base64_otr_decode en src/b64.c; la funci\u00f3n (2) otrl_proto_data_read_flags y la funci\u00f3n (3) otrl_proto_accept_data en src/proto.c; y la funci\u00f3n (4) (decode) in toolkit/parse.c in libotr before v3.2.1 asigna un b\u00fafer de longitud cero cuando se decodifica un (string) en base64, lo que permite a atacantes remotos causar una denegaci\u00f3n de servicio (ca\u00edda de la aplicaci\u00f3n) a trav\u00e9s de un mensaje con el valor \"?OTR:===.\", lo cual dispara un desbordamiento de b\u00fafer basado en memoria din\u00e1mica."}], "id": "CVE-2012-3461", "lastModified": "2026-04-29T01:13:23.040", "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": false}]}, "published": "2012-08-20T19:55:05.527", "references": [{"source": "secalert@redhat.com", "url": "http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=684121"}, {"source": "secalert@redhat.com", "url": "http://lists.cypherpunks.ca/pipermail/otr-dev/2012-July/001347.html"}, {"source": "secalert@redhat.com", "url": "http://lists.cypherpunks.ca/pipermail/otr-dev/2012-July/001348.html"}, {"source": "secalert@redhat.com", "url": "http://lists.opensuse.org/opensuse-security-announce/2012-11/msg00016.html"}, {"source": "secalert@redhat.com", "url": "http://lists.opensuse.org/opensuse-security-announce/2012-11/msg00019.html"}, {"source": "secalert@redhat.com", "url": "http://lists.opensuse.org/opensuse-security-announce/2013-01/msg00019.html"}, {"source": "secalert@redhat.com", "url": 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