Package Instance

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{
    "url": "http://public2.vulnerablecode.io/api/packages/86191?format=api",
    "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=api",
            "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": "0.4514",
                            "published_at": "2026-04-13T12:55:00Z"
                        },
                        {
                            "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": "0.45132",
                            "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"
                        }
                    ],
                    "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=api",
                    "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"
}