Node.js versions which bundle an unpatched version of OpenSSL or run against a dynamically linked version of OpenSSL which are unpatched are vulnerable to the Marvin Attack - https://people.redhat.com/~hkario/marvin/, if PCKS #1 v1.5 padding is allowed when performing RSA descryption using a private key. A flaw was found in Node.js. The privateDecrypt() API of the crypto library may allow a covert timing side-channel during PKCS#1 v1.5 padding error handling. This issue revealed significant timing differences in decryption for valid and invalid ciphertexts, which may allow a remote attacker to decrypt captured RSA ciphertexts or forge signatures, especially in scenarios involving API endpoints processing JSON Web Encryption messages.
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