{"url":"http://public2.vulnerablecode.io/api/vulnerabilities/1043?format=json","vulnerability_id":"VCID-gqbn-yyhm-mqcc","summary":"The NSS code used for checking PKCS#1 v1.5 was leaking information useful in mounting Bleichenbacher-like attacks.\nBoth the overall correctness of the padding as well as the length of the encrypted message was leaking through timing side-channel.\nBy 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.\nThe 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.","aliases":[{"alias":"CVE-2023-4421"}],"fixed_packages":[{"url":"http://public2.vulnerablecode.io/api/packages/610?format=json","purl":"pkg:mozilla/NSS@3.61.0","is_vulnerable":false,"affected_by_vulnerabilities":[],"resource_url":"http://public2.vulnerablecode.io/packages/pkg:mozilla/NSS@3.61.0"}],"affected_packages":[],"references":[{"reference_url":"https://www.mozilla.org/en-US/security/advisories/mfsa2023-53","reference_id":"mfsa2023-53","reference_type":"","scores":[{"value":"none","scoring_system":"generic_textual","scoring_elements":""}],"url":"https://www.mozilla.org/en-US/security/advisories/mfsa2023-53"}],"weaknesses":[],"exploits":[],"severity_range_score":null,"exploitability":null,"weighted_severity":null,"risk_score":null,"resource_url":"http://public2.vulnerablecode.io/vulnerabilities/VCID-gqbn-yyhm-mqcc"}