| パッケージ | 影響を受けるバージョン | 修正済みバージョン |
|---|---|---|
| c driver | ≥ 2.0.0, < 2.3.2 | 2.3.2 |
A flaw in libmongoc's SCRAM authentication implementation caused the client to continue the authentication handshake and transmit the client proof even when a nonce mismatch was detected in the server's first message. An unauthorized party with a man-in-the-middle position could exploit this by injecting a crafted server-first-message containing a controlled salt and low iteration count, then capturing the resulting client proof to perform offline password cracking. This vulnerability is mitigated by TLS, which is standard in production deployments.
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