{"url":"http://public2.vulnerablecode.io/api/packages/164543?format=json","purl":"pkg:rpm/redhat/nss@3.19.1-3?arch=el6_6","type":"rpm","namespace":"redhat","name":"nss","version":"3.19.1-3","qualifiers":{"arch":"el6_6"},"subpath":"","is_vulnerable":true,"next_non_vulnerable_version":null,"latest_non_vulnerable_version":null,"affected_by_vulnerabilities":[{"url":"http://public2.vulnerablecode.io/api/vulnerabilities/2931?format=json","vulnerability_id":"VCID-7gkv-pu79-43hx","summary":"Security researcher Matthew Green reported a Diffie–Hellman\n(DHE) key processing issue in Network Security Services (NSS) where a\nman-in-the-middle (MITM) attacker can force a server to downgrade TLS\nconnections to 512-bit export-grade cryptography by modifying client\nrequests to include only export-grade cipher suites. The resulting\nweak key can then be leveraged to impersonate the server. This attack\nis detailed in the \"Imperfect Forward\nSecrecy: How Diffie-Hellman Fails in Practice\" paper and is known as the\n\"Logjam Attack.\"This issue was fixed in NSS version 3.19.1 by limiting the lower strength of\nsupported DHE keys to use 1023 bit primes.","references":[{"reference_url":"https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2015-4000.json","reference_id":"","reference_type":"","scores":[{"value":"3.7","scoring_system":"cvssv3","scoring_elements":"CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N"}],"url":"https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2015-4000.json"},{"reference_url":"https://api.first.org/data/v1/epss?cve=CVE-2015-4000","reference_id":"","reference_type":"","scores":[{"value":"0.92346","scoring_system":"epss","scoring_elements":"0.9974","published_at":"2026-06-04T12:55:00Z"}],"url":"https://api.first.org/data/v1/epss?cve=CVE-2015-4000"},{"reference_url":"https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-8176","reference_id":"","reference_type":"","scores":[],"url":"https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-8176"},{"reference_url":"https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-8873","reference_id":"","reference_type":"","scores":[],"url":"https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-8873"},{"reference_url":"https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-0460","reference_id":"","reference_type":"","scores":[],"url":"https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-0460"},{"reference_url":"https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-0469","reference_id":"","reference_type":"","scores":[],"url":"https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-0469"},{"reference_url":"https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-0470","reference_id":"","reference_type":"","scores":[],"url":"https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-0470"},{"reference_url":"https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-0477","reference_id":"","reference_type":"","scores":[],"url":"https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-0477"},{"reference_url":"https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-0478","reference_id":"","reference_type":"","scores":[],"url":"https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-0478"},{"reference_url":"https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-0480","reference_id":"","reference_type":"","scores":[],"url":"https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-0480"},{"reference_url":"https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-0488","reference_id":"","reference_type":"","scores":[],"url":"https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-0488"},{"reference_url":"https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-1788","reference_id":"","reference_type":"","scores":[],"url":"https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-1788"},{"reference_url":"https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-1789","reference_id":"","reference_type":"","scores":[],"url":"https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-1789"},{"reference_url":"https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-1790","reference_id":"","reference_type":"","scores":[],"url":"https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-1790"},{"reference_url":"https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-1791","reference_id":"","reference_type":"","scores":[],"url":"https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-1791"},{"reference_url":"https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-1792","reference_id":"","reference_type":"","scores":[],"url":"https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-1792"},{"reference_url":"https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-2590","reference_id":"","reference_type":"","scores":[],"url":"https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-2590"},{"reference_url":"https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-2601","reference_id":"","reference_type":"","scores":[],"url":"https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-2601"},{"reference_url":"https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-2613","reference_id":"","reference_type":"","scores":[],"url":"https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-2613"},{"reference_url":"https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-2621","reference_id":"","reference_type":"","scores":[],"url":"https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-2621"},{"reference_url":"https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-2625","reference_id":"","reference_type":"","scores":[],"url":"https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-2625"},{"reference_url":"https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-2628","reference_id":"","reference_type":"","scores":[],"url":"https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-2628"},{"reference_url":"https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-2632","reference_id":"","reference_type":"","scores":[],"url":"https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-2632"},{"reference_url":"https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-2808","reference_id":"","reference_type":"","scores":[],"url":"https://cve.mitr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-2015:1544","reference_type":"","scores":[],"url":"https://access.redhat.com/errata/RHSA-2015:1544"},{"reference_url":"https://access.redhat.com/errata/RHSA-2015:1604","reference_id":"RHSA-2015:1604","reference_type":"","scores":[],"url":"https://access.redhat.com/errata/RHSA-2015:1604"},{"reference_url":"https://access.redhat.com/errata/RHSA-2016:2056","reference_id":"RHSA-2016:2056","reference_type":"","scores":[],"url":"https://access.redhat.com/errata/RHSA-2016:2056"}],"fixed_packages":[],"aliases":["CVE-2015-4000"],"risk_score":6.6,"exploitability":"2.0","weighted_severity":"3.3","resource_url":"http://public2.vulnerablecode.io/vulnerabilities/VCID-7gkv-pu79-43hx"},{"url":"http://public2.vulnerablecode.io/api/vulnerabilities/2945?format=json","vulnerability_id":"VCID-vct8-ur1y-63db","summary":"Security researcher Karthikeyan Bhargavan reported an issue\nin Network Security Services (NSS) where the client allows for a ECDHE_ECDSA\nexchange where the server does not send its ServerKeyExchange\nmessage instead of aborting the handshake. Instead, the NSS client will take the\nEC key from the ECDSA certificate. This violates the TLS protocol and also has\nsome security implications for forward secrecy. In this situation, the browser\nthinks it is engaged in an ECDHE exchange, but has been silently downgraded to a\nnon-forward secret mixed-ECDH exchange instead. As a result, if False\nStart is enabled, the browser will start sending data encrypted under\nthese non-forward-secret connection keys. This issue was fixed in NSS version\n3.19.1.","references":[{"reference_url":"https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2015-2721.json","reference_id":"","reference_type":"","scores":[],"url":"https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2015-2721.json"},{"reference_url":"https://api.first.org/data/v1/epss?cve=CVE-2015-2721","reference_id":"","reference_type":"","scores":[{"value":"0.00511","scoring_system":"epss","scoring_elements":"0.66799","published_at":"2026-06-04T12:55:00Z"}],"url":"https://api.first.org/data/v1/epss?cve=CVE-2015-2721"},{"reference_url":"https://bugzilla.redhat.com/show_bug.cgi?id=1236967","reference_id":"1236967","reference_type":"","scores":[],"url":"https://bugzilla.redhat.com/show_bug.cgi?id=1236967"},{"reference_url":"https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-2721","reference_id":"CVE-2015-2721","reference_type":"","scores":[],"url":"https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-2721"},{"reference_url":"https://security.gentoo.org/glsa/201512-10","reference_id":"GLSA-201512-10","reference_type":"","scores":[],"url":"https://security.gentoo.org/glsa/201512-10"},{"reference_url":"https://security.gentoo.org/glsa/201605-06","reference_id":"GLSA-201605-06","reference_type":"","scores":[],"url":"https://security.gentoo.org/glsa/201605-06"},{"reference_url":"https://www.mozilla.org/en-US/security/advisories/mfsa2015-71","reference_id":"mfsa2015-71","reference_type":"","scores":[{"value":"none","scoring_system":"generic_textual","scoring_elements":""}],"url":"https://www.mozilla.org/en-US/security/advisories/mfsa2015-71"},{"reference_url":"https://access.redhat.com/errata/RHSA-2015:1185","reference_id":"RHSA-2015:1185","reference_type":"","scores":[],"url":"https://access.redhat.com/errata/RHSA-2015:1185"},{"reference_url":"https://access.redhat.com/errata/RHSA-2015:1664","reference_id":"RHSA-2015:1664","reference_type":"","scores":[],"url":"https://access.redhat.com/errata/RHSA-2015:1664"}],"fixed_packages":[],"aliases":["CVE-2015-2721"],"risk_score":null,"exploitability":"0.5","weighted_severity":"0.0","resource_url":"http://public2.vulnerablecode.io/vulnerabilities/VCID-vct8-ur1y-63db"}],"fixing_vulnerabilities":[],"risk_score":"6.6","resource_url":"http://public2.vulnerablecode.io/packages/pkg:rpm/redhat/nss@3.19.1-3%3Farch=el6_6"}