CVE ID:	CVE-2023-4421
Description:	The NSS code used for checking PKCS#1 v1.5 was leaking information useful in mounting Bleichenbacher-like attacks. Both the overall correctness of the padding as well as the length of the encrypted message was leaking through timing side-channel. By sending large number of attacker-selected ciphertexts, the attacker would be able to decrypt a previously intercepted PKCS#1 v1.5 ciphertext (for example, to decrypt a TLS session that used RSA key exchange), or forge a signature using the victim's key. The issue was fixed by implementing the implicit rejection algorithm, in which the NSS returns a deterministic random message in case invalid padding is detected, as proposed in the Marvin Attack paper. This vulnerability affects NSS < 3.61.
Test IDs:	1.3.6.1.4.1.25623.1.1.1.2.2023.3634
Cross References:	Common Vulnerability Exposure (CVE) ID: CVE-2023-4421 https://bugzilla.mozilla.org/show_bug.cgi?id=1651411 https://bugzilla.mozilla.org/show_bug.cgi?id=1651411 https://www.mozilla.org/security/advisories/mfsa2023-53/ https://www.mozilla.org/security/advisories/mfsa2023-53/