{"id":"CVE-2020-12638","state":"PUBLISHED","title":"An encryption-bypass issue was discovered on Espressif ESP-IDF devices through 4.2, ESP8266_NONOS_SDK devices through 3.0.3, and ESP8266_RTOS_SDK devices through 3.3. Broadcasting ","description":"An encryption-bypass issue was discovered on Espressif ESP-IDF devices through 4.2, ESP8266_NONOS_SDK devices through 3.0.3, and ESP8266_RTOS_SDK devices through 3.3. Broadcasting forged beacon frames forces a device to change its authentication mode to OPEN, effectively disabling its 802.11 encryption.","publishedAt":"2020-07-23T15:41:58.000Z","updatedAt":"2024-08-04T12:04:22.314Z","severity":null,"assigner":"mitre","products":["n/a n/a"],"affected":[{"vendor":"n/a","product":"n/a","versions":[{"version":"n/a","status":"affected"}]}],"references":["https://github.com/espressif/esp-idf","https://github.com/espressif/ESP8266_NONOS_SDK","https://github.com/espressif/ESP8266_RTOS_SDK","https://lbsfilm.at/blog/wpa2-authenticationmode-downgrade-in-espressif-microprocessors"],"weaknesses":[],"ingestedAt":"2026-10-29T19:46:27.697Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2020/12xxx/CVE-2020-12638.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.1","cveMetadata":{"cveId":"CVE-2020-12638","state":"PUBLISHED","datePublished":"2020-07-23T15:41:58.000Z","dateUpdated":"2024-08-04T12:04:22.314Z","assignerShortName":"mitre","assignerOrgId":"8254265b-2729-46b6-b9e3-3dfca2d5bfca","dateReserved":"2020-05-04T00:00:00.000Z"},"containers":{"cna":{"descriptions":[{"lang":"en","value":"An encryption-bypass issue was discovered on Espressif ESP-IDF devices through 4.2, ESP8266_NONOS_SDK devices through 3.0.3, and ESP8266_RTOS_SDK devices through 3.3. Broadcasting forged beacon frames forces a device to change its authentication mode to OPEN, effectively disabling its 802.11 encryption."}],"affected":[{"vendor":"n/a","product":"n/a","versions":[{"version":"n/a","status":"affected"}]}],"references":[{"url":"https://github.com/espressif/esp-idf","tags":["x_refsource_MISC"]},{"url":"https://github.com/espressif/ESP8266_NONOS_SDK","tags":["x_refsource_MISC"]},{"url":"https://github.com/espressif/ESP8266_RTOS_SDK","tags":["x_refsource_MISC"]},{"url":"https://lbsfilm.at/blog/wpa2-authenticationmode-downgrade-in-espressif-microprocessors","tags":["x_refsource_MISC"]}],"problemTypes":[{"descriptions":[{"description":"n/a","lang":"en","type":"text"}]}],"providerMetadata":{"shortName":"mitre","dateUpdated":"2020-07-23T15:41:58.000Z","orgId":"8254265b-2729-46b6-b9e3-3dfca2d5bfca"},"x_legacyV4Record":{"CVE_data_meta":{"ASSIGNER":"cve@mitre.org","ID":"CVE-2020-12638","STATE":"PUBLIC"},"affects":{"vendor":{"vendor_data":[{"product":{"product_data":[{"product_name":"n/a","version":{"version_data":[{"version_value":"n/a"}]}}]},"vendor_name":"n/a"}]}},"data_format":"MITRE","data_type":"CVE","data_version":"4.0","description":{"description_data":[{"lang":"eng","value":"An encryption-bypass issue was discovered on Espressif ESP-IDF devices through 4.2, ESP8266_NONOS_SDK devices through 3.0.3, and ESP8266_RTOS_SDK devices through 3.3. Broadcasting forged beacon frames forces a device to change its authentication mode to OPEN, effectively disabling its 802.11 encryption."}]},"problemtype":{"problemtype_data":[{"description":[{"lang":"eng","value":"n/a"}]}]},"references":{"reference_data":[{"name":"https://github.com/espressif/esp-idf","refsource":"MISC","url":"https://github.com/espressif/esp-idf"},{"name":"https://github.com/espressif/ESP8266_NONOS_SDK","refsource":"MISC","url":"https://github.com/espressif/ESP8266_NONOS_SDK"},{"name":"https://github.com/espressif/ESP8266_RTOS_SDK","refsource":"MISC","url":"https://github.com/espressif/ESP8266_RTOS_SDK"},{"name":"https://lbsfilm.at/blog/wpa2-authenticationmode-downgrade-in-espressif-microprocessors","refsource":"MISC","url":"https://lbsfilm.at/blog/wpa2-authenticationmode-downgrade-in-espressif-microprocessors"}]}}},"adp":[{"title":"CVE Program Container","references":[{"url":"https://github.com/espressif/esp-idf","tags":["x_refsource_MISC","x_transferred"]},{"url":"https://github.com/espressif/ESP8266_NONOS_SDK","tags":["x_refsource_MISC","x_transferred"]},{"url":"https://github.com/espressif/ESP8266_RTOS_SDK","tags":["x_refsource_MISC","x_transferred"]},{"url":"https://lbsfilm.at/blog/wpa2-authenticationmode-downgrade-in-espressif-microprocessors","tags":["x_refsource_MISC","x_transferred"]}],"providerMetadata":{"shortName":"CVE","orgId":"af854a3a-2127-422b-91ae-364da2661108","dateUpdated":"2024-08-04T12:04:22.314Z"}}]}}}