{"containers":{"cna":{"affected":[{"product":"Apache APISIX","vendor":"Apache Software Foundation","versions":[{"lessThanOrEqual":"2.12.1","status":"affected","version":"Apache APISIX","versionType":"custom"}]}],"credits":[{"lang":"en","value":"Thanks for Guangli Dong from www.huoxian.cn"}],"descriptions":[{"lang":"en","value":"In Apache APISIX before 2.13.0, when decoding JSON with duplicate keys, lua-cjson will choose the last occurred value as the result. By passing a JSON with a duplicate key, the attacker can bypass the body_schema validation in the request-validation plugin. For example, `{\"string_payload\":\"bad\",\"string_payload\":\"good\"}` can be used to hide the \"bad\" input. Systems satisfy three conditions below are affected by this attack: 1. use body_schema validation in the request-validation plugin 2. upstream application uses a special JSON library that chooses the first occurred value, like jsoniter or gojay 3. upstream application does not validate the input anymore. The fix in APISIX is to re-encode the validated JSON input back into the request body at the side of APISIX. Improper Input Validation vulnerability in __COMPONENT__ of Apache APISIX allows an attacker to __IMPACT__. This issue affects Apache APISIX Apache APISIX version 2.12.1 and prior versions."}],"metrics":[{"other":{"content":{"other":"low"},"type":"unknown"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-20","description":"CWE-20 Improper Input Validation","lang":"en","type":"CWE"}]}],"providerMetadata":{"dateUpdated":"2022-03-28T11:06:08.000Z","orgId":"f0158376-9dc2-43b6-827c-5f631a4d8d09","shortName":"apache"},"references":[{"tags":["x_refsource_MISC"],"url":"https://lists.apache.org/thread/03vd2j81krxmpz6xo8p1dl642flpo6fv"},{"name":"[oss-security] 20220328 CVE-2022-25757: Apache APISIX: the body_schema check in request-validation plugin can be bypassed","tags":["mailing-list","x_refsource_MLIST"],"url":"http://www.openwall.com/lists/oss-security/2022/03/28/2"}],"source":{"discovery":"UNKNOWN"},"title":"Apache APISIX: the body_schema check in request-validation plugin can be bypassed","workarounds":[{"lang":"en","value":"1. upgrade APISIX to 2.13.0 if you need to use the body_schema validation in the request-validation plugin\n2. add additional validation in the application code, embrace defensive programming"}],"x_generator":{"engine":"Vulnogram 0.0.9"},"x_legacyV4Record":{"CVE_data_meta":{"ASSIGNER":"security@apache.org","ID":"CVE-2022-25757","STATE":"PUBLIC","TITLE":"Apache APISIX: the body_schema check in request-validation plugin can be bypassed"},"affects":{"vendor":{"vendor_data":[{"product":{"product_data":[{"product_name":"Apache APISIX","version":{"version_data":[{"version_affected":"<=","version_name":"Apache APISIX","version_value":"2.12.1"}]}}]},"vendor_name":"Apache Software Foundation"}]}},"credit":[{"lang":"eng","value":"Thanks for Guangli Dong from www.huoxian.cn"}],"data_format":"MITRE","data_type":"CVE","data_version":"4.0","description":{"description_data":[{"lang":"eng","value":"In Apache APISIX before 2.13.0, when decoding JSON with duplicate keys, lua-cjson will choose the last occurred value as the result. 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