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modmul function in sshbn.c in PuTTY before 0.63 allows remote SSH servers to cause a denial of service (crash) and possibly trigger memory corruption or code execution via a crafted DSA signature, which is not properly handled when performing certain bit-shifting operations during modular multiplication."}, {"lang": "es", "value": "Desbordamiento de b\u00fafer basado en memoria din\u00e1mica en la funci\u00f3n modmul en sshbn.c en PuTTY 0.62 y anteriores, permite a servidores SSH remotos provocar una denegaci\u00f3n de servicio (ca\u00edda) y posiblemente causar una corrupci\u00f3n de memoria o ejecuci\u00f3n de c\u00f3digo a trav\u00e9s de una firma DSA manipulada que no es manejada adecuadamente cuando se realizan determinadas operaciones de bit-shifting durante una multiplicaci\u00f3n modular."}], "id": "CVE-2013-4206", "lastModified": "2024-11-21T01:55:07.733", "metrics": {"cvssMetricV2": [{"acInsufInfo": false, "baseSeverity": "MEDIUM", "cvssData": {"accessComplexity": "MEDIUM", "accessVector": "NETWORK", "authentication": "NONE", "availabilityImpact": "PARTIAL", "baseScore": 6.8, "confidentialityImpact": "PARTIAL", "integrityImpact": "PARTIAL", "vectorString": "AV:N/AC:M/Au:N/C:P/I:P/A:P", "version": "2.0"}, "exploitabilityScore": 8.6, "impactScore": 6.4, "obtainAllPrivilege": false, "obtainOtherPrivilege": false, "obtainUserPrivilege": false, "source": "nvd@nist.gov", "type": "Primary", "userInteractionRequired": false}]}, "published": "2013-08-19T23:55:08.723", "references": [{"source": "secalert@redhat.com", "url": "http://lists.opensuse.org/opensuse-updates/2013-08/msg00035.html"}, {"source": "secalert@redhat.com", "tags": ["Vendor Advisory"], "url": "http://secunia.com/advisories/54379"}, {"source": "secalert@redhat.com", "url": "http://secunia.com/advisories/54533"}, {"source": "secalert@redhat.com", "tags": ["Patch"], "url": "http://svn.tartarus.org/sgt/putty/sshbn.c?sortby=date&r1=9977&r2=9976&pathrev=9977"}, {"source": "secalert@redhat.com", "tags": 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