{"id":"UBUNTU-CVE-2016-8635","details":"It was found that Diffie Hellman Client key exchange handling in NSS 3.21.x was vulnerable to small subgroup confinement attack. An attacker could use this flaw to recover private keys by confining the client DH key to small subgroup of the desired group.","modified":"2026-04-22T11:40:37.597065Z","published":"2016-11-17T00:00:00Z","related":["USN-3163-1"],"upstream":["CVE-2016-8635"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2016-8635"},{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-3163-1"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2016-8635"}],"affected":[{"package":{"name":"nss","ecosystem":"Ubuntu:14.04:LTS","purl":"pkg:deb/ubuntu/nss@2:3.26.2-0ubuntu0.14.04.3?arch=source&distro=trusty"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2:3.26.2-0ubuntu0.14.04.3"}]}],"versions":["2:3.15.1-1ubuntu1","2:3.15.2-1","2:3.15.3-1","2:3.15.3.1-1","2:3.15.3.1-1.1","2:3.15.3.1-1.1ubuntu1","2:3.15.4-1ubuntu3","2:3.15.4-1ubuntu4","2:3.15.4-1ubuntu5","2:3.15.4-1ubuntu6","2:3.15.4-1ubuntu7","2:3.15.4-1ubuntu7.1","2:3.17-0ubuntu0.14.04.1","2:3.17.1-0ubuntu0.14.04.1","2:3.17.1-0ubuntu0.14.04.2","2:3.17.4-0ubuntu0.14.04.1","2:3.19.2-0ubuntu0.14.04.1","2:3.19.2.1-0ubuntu0.14.04.1","2:3.19.2.1-0ubuntu0.14.04.2","2:3.21-0ubuntu0.14.04.1","2:3.21-0ubuntu0.14.04.2","2:3.23-0ubuntu0.14.04.1"],"ecosystem_specific":{"availability":"No subscription required","binaries":[{"binary_name":"libnss3","binary_version":"2:3.26.2-0ubuntu0.14.04.3"},{"binary_name":"libnss3-1d","binary_version":"2:3.26.2-0ubuntu0.14.04.3"},{"binary_name":"libnss3-nssdb","binary_version":"2:3.26.2-0ubuntu0.14.04.3"},{"binary_name":"libnss3-tools","binary_version":"2:3.26.2-0ubuntu0.14.04.3"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2016/UBUNTU-CVE-2016-8635.json"}},{"package":{"name":"nss","ecosystem":"Ubuntu:16.04:LTS","purl":"pkg:deb/ubuntu/nss@2:3.26.2-0ubuntu0.16.04.2?arch=source&distro=xenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2:3.26.2-0ubuntu0.16.04.2"}]}],"versions":["2:3.19.2-1ubuntu1","2:3.19.2.1-0ubuntu1","2:3.21-1ubuntu2","2:3.21-1ubuntu3","2:3.21-1ubuntu4","2:3.23-0ubuntu0.16.04.1"],"ecosystem_specific":{"availability":"No subscription required","binaries":[{"binary_name":"libnss3","binary_version":"2:3.26.2-0ubuntu0.16.04.2"},{"binary_name":"libnss3-1d","binary_version":"2:3.26.2-0ubuntu0.16.04.2"},{"binary_name":"libnss3-nssdb","binary_version":"2:3.26.2-0ubuntu0.16.04.2"},{"binary_name":"libnss3-tools","binary_version":"2:3.26.2-0ubuntu0.16.04.2"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2016/UBUNTU-CVE-2016-8635.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N"},{"type":"CVSS_V3","score":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N"},{"type":"Ubuntu","score":"medium"}]}