{"url":"http://public2.vulnerablecode.io/api/packages/86191?format=json","purl":"pkg:mozilla/NSS@3.61.0","type":"mozilla","namespace":"","name":"NSS","version":"3.61.0","qualifiers":{},"subpath":"","is_vulnerable":false,"next_non_vulnerable_version":"3.68.1","latest_non_vulnerable_version":"3.73.0","affected_by_vulnerabilities":[],"fixing_vulnerabilities":[{"url":"http://public2.vulnerablecode.io/api/vulnerabilities/63103?format=json","vulnerability_id":"VCID-2zrv-q4tb-wqeg","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.","references":[{"reference_url":"https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2023-4421.json","reference_id":"","reference_type":"","scores":[{"value":"6.5","scoring_system":"cvssv3","scoring_elements":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N"}],"url":"https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2023-4421.json"},{"reference_url":"https://api.first.org/data/v1/epss?cve=CVE-2023-4421","reference_id":"","reference_type":"","scores":[{"value":"0.00224","scoring_system":"epss","scoring_elements":"0.45017","published_at":"2026-05-14T12:55:00Z"},{"value":"0.00224","scoring_system":"epss","scoring_elements":"0.44918","published_at":"2026-05-11T12:55:00Z"},{"value":"0.00224","scoring_system":"epss","scoring_elements":"0.44943","published_at":"2026-05-12T12:55:00Z"},{"value":"0.00224","scoring_system":"epss","scoring_elements":"0.45132","published_at":"2026-04-02T12:55:00Z"},{"value":"0.00224","scoring_system":"epss","scoring_elements":"0.45154","published_at":"2026-04-04T12:55:00Z"},{"value":"0.00224","scoring_system":"epss","scoring_elements":"0.45096","published_at":"2026-04-07T12:55:00Z"},{"value":"0.00224","scoring_system":"epss","scoring_elements":"0.45149","published_at":"2026-04-09T12:55:00Z"},{"value":"0.00224","scoring_system":"epss","scoring_elements":"0.45171","published_at":"2026-04-11T12:55:00Z"},{"value":"0.00224","scoring_system":"epss","scoring_elements":"0.45138","published_at":"2026-04-12T12:55:00Z"},{"value":"0.00224","scoring_system":"epss","scoring_elements":"0.4514","published_at":"2026-04-13T12:55:00Z"},{"value":"0.00224","scoring_system":"epss","scoring_elements":"0.4519","published_at":"2026-04-16T12:55:00Z"},{"value":"0.00224","scoring_system":"epss","scoring_elements":"0.45184","published_at":"2026-04-18T12:55:00Z"},{"value":"0.00224","scoring_system":"epss","scoring_elements":"0.45135","published_at":"2026-04-21T12:55:00Z"},{"value":"0.00224","scoring_system":"epss","scoring_elements":"0.45049","published_at":"2026-04-24T12:55:00Z"},{"value":"0.00224","scoring_system":"epss","scoring_elements":"0.45056","published_at":"2026-04-26T12:55:00Z"},{"value":"0.00224","scoring_system":"epss","scoring_elements":"0.44997","published_at":"2026-04-29T12:55:00Z"},{"value":"0.00224","scoring_system":"epss","scoring_elements":"0.44892","published_at":"2026-05-05T12:55:00Z"},{"value":"0.00224","scoring_system":"epss","scoring_elements":"0.44959","published_at":"2026-05-07T12:55:00Z"},{"value":"0.00224","scoring_system":"epss","scoring_elements":"0.44976","published_at":"2026-05-09T12:55:00Z"}],"url":"https://api.first.org/data/v1/epss?cve=CVE-2023-4421"},{"reference_url":"https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-4421","reference_id":"","reference_type":"","scores":[],"url":"https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-4421"},{"reference_url":"https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml","reference_id":"","reference_type":"","scores":[{"value":"5.9","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N"}],"url":"https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml"},{"reference_url":"https://bugzilla.redhat.com/show_bug.cgi?id=2238677","reference_id":"2238677","reference_type":"","scores":[],"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2238677"},{"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"},{"reference_url":"https://usn.ubuntu.com/6727-1/","reference_id":"USN-6727-1","reference_type":"","scores":[],"url":"https://usn.ubuntu.com/6727-1/"}],"fixed_packages":[{"url":"http://public2.vulnerablecode.io/api/packages/86191?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"}],"aliases":["CVE-2023-4421"],"risk_score":3.0,"exploitability":"0.5","weighted_severity":"5.9","resource_url":"http://public2.vulnerablecode.io/vulnerabilities/VCID-2zrv-q4tb-wqeg"}],"risk_score":null,"resource_url":"http://public2.vulnerablecode.io/packages/pkg:mozilla/NSS@3.61.0"}