{"resultsPerPage":1,"startIndex":0,"totalResults":1,"format":"NVD_CVE","version":"2.0","timestamp":"2026-04-20T18:28:05.227","vulnerabilities":[{"cve":{"id":"CVE-2019-12677","sourceIdentifier":"psirt@cisco.com","published":"2019-10-02T19:15:12.327","lastModified":"2024-11-21T04:23:20.353","vulnStatus":"Modified","cveTags":[],"descriptions":[{"lang":"en","value":"A vulnerability in the Secure Sockets Layer (SSL) VPN feature of Cisco Adaptive Security Appliance (ASA) Software could allow an authenticated, remote attacker to cause a denial of service (DoS) condition that prevents the creation of new SSL/Transport Layer Security (TLS) connections to an affected device. The vulnerability is due to incorrect handling of Base64-encoded strings. An attacker could exploit this vulnerability by opening many SSL VPN sessions to an affected device. The attacker would need to have valid user credentials on the affected device to exploit this vulnerability. A successful exploit could allow the attacker to overwrite a special system memory location, which will eventually result in memory allocation errors for new SSL/TLS sessions to the device, preventing successful establishment of these sessions. A reload of the device is required to recover from this condition. Established SSL/TLS connections to the device and SSL/TLS connections through the device are not affected. Note: Although this vulnerability is in the SSL VPN feature, successful exploitation of this vulnerability would affect all new SSL/TLS sessions to the device, including management sessions."},{"lang":"es","value":"Una vulnerabilidad en la funcionalidad VPN Secure Sockets Layer (SSL) del Software Cisco Adaptive Security Appliance (ASA), podría permitir a un atacante remoto autenticado causar una condición de denegación de servicio (DoS) que impide la creación de nuevas conexiones SSL/Transport Layer Security (TLS) en un dispositivo afectado. La vulnerabilidad es debido al manejo incorrecto de las cadenas codificadas en Base64. Un atacante podría explotar esta vulnerabilidad al abrir muchas sesiones VPN SSL en un dispositivo afectado. El atacante necesitaría tener credenciales de usuario válidas sobre el dispositivo afectado para explotar esta vulnerabilidad. Una explotación con éxito podría permitir al atacante sobrescribir una ubicación especial de memoria del sistema, lo que eventualmente resulta en errores de asignación de memoria para nuevas sesiones SSL/TLS en el dispositivo, impidiendo el establecimiento con éxito de estas sesiones. Se requiere una recarga del dispositivo para recuperarse de esta condición. Las conexiones SSL/TLS establecidas en el dispositivo y las conexiones SSL/TLS por medio del dispositivo no están afectadas. Nota: Aunque esta vulnerabilidad se encuentra en la funcionalidad VPN SSL, la explotación con éxito de esta vulnerabilidad afectaría todas las nuevas sesiones SSL/TLS en el dispositivo, incluidas las sesiones de administración."}],"metrics":{"cvssMetricV31":[{"source":"nvd@nist.gov","type":"Primary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","baseScore":6.5,"baseSeverity":"MEDIUM","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"LOW","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"NONE","availabilityImpact":"HIGH"},"exploitabilityScore":2.8,"impactScore":3.6}],"cvssMetricV30":[{"source":"psirt@cisco.com","type":"Secondary","cvssData":{"version":"3.0","vectorString":"CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H","baseScore":7.7,"baseSeverity":"HIGH","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"LOW","userInteraction":"NONE","scope":"CHANGED","confidentialityImpact":"NONE","integrityImpact":"NONE","availabilityImpact":"HIGH"},"exploitabilityScore":3.1,"impactScore":4.0}],"cvssMetricV2":[{"source":"nvd@nist.gov","type":"Primary","cvssData":{"version":"2.0","vectorString":"AV:N/AC:L/Au:S/C:N/I:N/A:P","baseScore":4.0,"accessVector":"NETWORK","accessComplexity":"LOW","authentication":"SINGLE","confidentialityImpact":"NONE","integrityImpact":"NONE","availabilityImpact":"PARTIAL"},"baseSeverity":"MEDIUM","exploitabilityScore":8.0,"impactScore":2.9,"acInsufInfo":false,"obtainAllPrivilege":false,"obtainUserPrivilege":false,"obtainOtherPrivilege":false,"userInteractionRequired":false}]},"weaknesses":[{"source":"psirt@cisco.com","type":"Secondary","description":[{"lang":"en","value":"CWE-172"}]},{"source":"nvd@nist.gov","type":"Primary","description":[{"lang":"en","value":"CWE-755"}]}],"configurations":[{"operator":"AND","nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:a:cisco:adaptive_security_appliance_software:*:*:*:*:*:*:*:*","versionStartIncluding":"9.3","versionEndExcluding":"9.3.3.9","matchCriteriaId":"4D7468AA-4332-41CC-9B7D-C16CDF45522F"},{"vulnerable":true,"criteria":"cpe:2.3:o:cisco:adaptive_security_appliance_software:*:*:*:*:*:*:*:*","versionEndExcluding":"9.1.7.4","matchCriteriaId":"D31DCDFF-F5DE-479C-B5CE-C5BC05570DE5"},{"vulnerable":true,"criteria":"cpe:2.3:o:cisco:adaptive_security_appliance_software:*:*:*:*:*:*:*:*","versionStartIncluding":"9.2","versionEndExcluding":"9.2.4.8","matchCriteriaId":"E0AA239B-A459-4F22-8CB2-BB3AC5AB205F"},{"vulnerable":true,"criteria":"cpe:2.3:o:cisco:adaptive_security_appliance_software:*:*:*:*:*:*:*:*","versionStartIncluding":"9.4","versionEndExcluding":"9.4.2.11","matchCriteriaId":"28D669B7-695E-4B16-9000-3BA54084393F"},{"vulnerable":true,"criteria":"cpe:2.3:o:cisco:adaptive_security_appliance_software:*:*:*:*:*:*:*:*","versionStartIncluding":"9.5","versionEndExcluding":"9.5.2.5","matchCriteriaId":"FA315858-6E07-49CE-A3C7-B4CEBE1A96AD"},{"vulnerable":true,"criteria":"cpe:2.3:o:cisco:adaptive_security_appliance_software:*:*:*:*:*:*:*:*","versionStartIncluding":"9.6","versionEndExcluding":"9.6.2","matchCriteriaId":"A4BA9724-957D-4E67-9C3F-9FCE199B1DA4"}]},{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":false,"criteria":"cpe:2.3:h:cisco:asa_5505:-:*:*:*:*:*:*:*","matchCriteriaId":"8E6A8BB7-2000-4CA2-9DD7-89573CE4C73A"},{"vulnerable":false,"criteria":"cpe:2.3:h:cisco:asa_5510:-:*:*:*:*:*:*:*","matchCriteriaId":"B091B9BA-D4CA-435B-8D66-602B45F0E0BD"},{"vulnerable":false,"criteria":"cpe:2.3:h:cisco:asa_5512-x:-:*:*:*:*:*:*:*","matchCriteriaId":"08F0F160-DAD2-48D4-B7B2-4818B2526F35"},{"vulnerable":false,"criteria":"cpe:2.3:h:cisco:asa_5515-x:-:*:*:*:*:*:*:*","matchCriteriaId":"977D597B-F6DE-4438-AB02-06BE64D71EBE"},{"vulnerable":false,"criteria":"cpe:2.3:h:cisco:asa_5520:-:*:*:*:*:*:*:*","matchCriteriaId":"2B387F62-6341-434D-903F-9B72E7F84ECB"},{"vulnerable":false,"criteria":"cpe:2.3:h:cisco:asa_5525-x:-:*:*:*:*:*:*:*","matchCriteriaId":"EB71EB29-0115-4307-A9F7-262394FD9FB0"},{"vulnerable":false,"criteria":"cpe:2.3:h:cisco:asa_5550:-:*:*:*:*:*:*:*","matchCriteriaId":"E6287D95-F564-44B7-A0F9-91396D7C2C4E"},{"vulnerable":false,"criteria":"cpe:2.3:h:cisco:asa_5555-x:-:*:*:*:*:*:*:*","matchCriteriaId":"5535C936-391B-4619-AA03-B35265FC15D7"},{"vulnerable":false,"criteria":"cpe:2.3:h:cisco:asa_5580:-:*:*:*:*:*:*:*","matchCriteriaId":"D1E828B8-5ECC-4A09-B2AD-DEDC558713DE"},{"vulnerable":false,"criteria":"cpe:2.3:h:cisco:asa_5585-x:-:*:*:*:*:*:*:*","matchCriteriaId":"16AE20C2-C77E-4E04-BF13-A48696E52426"}]}]}],"references":[{"url":"https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20191002-asa-ssl-vpn-dos","source":"psirt@cisco.com","tags":["Vendor Advisory"]},{"url":"https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20191002-asa-ssl-vpn-dos","source":"af854a3a-2127-422b-91ae-364da2661108","tags":["Vendor Advisory"]}]}}]}