漏洞信息
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Vulnerability Title
ePA 3.x Integration: AES-GCM Nonce Reuse via Frozen VAU Request Counter
Vulnerability Description
ePA 3.x Integration implements the authorization workflow and writes Medical Information Objects to Germany's electronic patient record. Prior to 1.3.0, ePA 3.x Integration leaves request_counter unchanged in app/vau/VAUProtokoll.py while constructing VAU messages. The frozen client request counter causes the server side to reuse AES-GCM nonce and key combinations across responses. A network attacker who collects repeated ciphertexts can recover the XOR of plaintexts and use predictable inner HTTP headers and JSON fields to recover sensitive data, including patient health records. Repeated nonces can also enable recovery of the GHASH authentication key through the Joux forbidden attack, allowing forged AES-GCM messages and injection of malicious responses. The response-counter check also fails to maintain last_response_counter, weakening replay and ordering validation. This issue is fixed in version 1.3.0.
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
Vulnerability Type
在加密中重用Nonce与密钥对
Vulnerability Title
fbeta ePA 3.x Integration 加密问题漏洞
Vulnerability Description
fbeta ePA 3.x Integration是德国fbeta公司的一款Web服务集成组件。 fbeta ePA 3.x Integration 1.3.0之前版本存在加密问题漏洞,该漏洞源于构造VAU消息时request_counter未改变,导致服务器端重用AES-GCM nonce和密钥组合,可能使网络攻击者恢复明文敏感数据,还可恢复GHASH认证密钥,伪造AES-GCM消息并注入恶意响应。
CVSS Information
N/A
Vulnerability Type
N/A