Observable Discrepancy Affecting bouncycastle.cryptography package, versions [,2.3.1)
Threat Intelligence
Exploit Maturity
Proof of concept
EPSS
0.05% (17th
percentile)
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Test your applications- Snyk ID SNYK-DOTNET-BOUNCYCASTLECRYPTOGRAPHY-7831266
- published 26 Aug 2024
- disclosed 11 Apr 2024
- credit Hubert Kario
Introduced: 11 Apr 2024
CVE-2024-30171 Open this link in a new tabHow to fix?
Upgrade BouncyCastle.Cryptography to version 2.3.1 or higher.
Overview
Affected versions of this package are vulnerable to Observable Discrepancy due to the timing difference between exceptions thrown when processing RSA key exchange handshakes, AKA Marvin.
Note: The implemented fix mitigates the leakage of data via the PKCS#1 interface, but does not fully alleviate the side-channel as it allows cases in which the padding check fails but the handshake succeeds.
CVSS Scores
version 3.1