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Apache CXF ships with a OpenId Connect JWK Keys service, which allows a client to obtain the public keys in JWK format, which can then be used to verify the signature of tokens issued by the service. Typically, the service obtains the public key from a local keystore (JKS/PKCS12) by specifing the path of the keystore and the alias of the keystore entry. This case is not vulnerable. However it is also possible to obtain the keys from a JWK keystore file, by setting the configuration parameter "rs.security.keystore.type" to "jwk". For this case all keys are returned in this file "as is", including all private key and secret key credentials. This is an obvious security risk if the user has configured the signature keystore file with private or secret key credentials. From CXF 3.3.5 and 3.2.12, it is mandatory to specify an alias corresponding to the id of the key in the JWK file, and only this key is returned. In addition, any private key information is omitted by default. "oct" keys, which contain secret keys, are not returned at all.

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Apache CXF 安全漏洞

Apache CXF是美国阿帕奇（Apache）基金会的一个开源的Web服务框架。该框架支持多种Web服务标准、多种前端编程API等。 Apache CXF 3.3.5之前版本和3.2.12之前版本（带有OpenId Connect JWK Keys服务）中存在安全漏洞。攻击者可利用该漏洞获取私钥和密钥凭证。

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