Cloud Controller provides signed URL with write authorization to read only user

Cloud Foundry Cloud Controller, versions prior to 1.78.0, contain an endpoint with improper authorization. A remote authenticated malicious user with read permissions can request package information and receive a signed bit-service url that grants the user write permissions to the bit-service.

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授权机制不恰当

Cloud Foundry Cloud Controller 授权问题漏洞

Cloud Foundry是美国Cloud Foundry基金会的一套开源的平台即服务（PaaS）云计算平台。该产品提供容器调度、持续交付和自动化服务部署等功能。Cloud Controller是其中的一款云控制器。 Cloud Foundry Cloud Controller 1.78.0之前版本中存在安全漏洞。远程攻击者可利用该漏洞获取已签名的bit-service URL，进而对bit-service执行写入操作。

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