{"id":"UBUNTU-CVE-2018-18508","details":"In Network Security Services (NSS) before 3.36.7 and before 3.41.1, a malformed signature can cause a crash due to a null dereference, resulting in a Denial of Service.","modified":"2026-04-22T13:00:19.509295Z","published":"2018-12-31T00:00:00Z","related":["USN-3898-1","USN-3898-2"],"upstream":["CVE-2018-18508"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2018-18508"},{"type":"REPORT","url":"https://developer.mozilla.org/en-US/docs/Mozilla/Projects/NSS/NSS_3.42.1_release_notes"},{"type":"REPORT","url":"https://developer.mozilla.org/en-US/docs/Mozilla/Projects/NSS/NSS_3.41.1_release_notes"},{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-3898-1"},{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-3898-2"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2018-18508"}],"affected":[{"package":{"name":"nss","ecosystem":"Ubuntu:14.04:LTS","purl":"pkg:deb/ubuntu/nss@2:3.28.4-0ubuntu0.14.04.5?arch=source&distro=trusty"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2:3.28.4-0ubuntu0.14.04.5"}]}],"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","2:3.26.2-0ubuntu0.14.04.3","2:3.28.4-0ubuntu0.14.04.1","2:3.28.4-0ubuntu0.14.04.2","2:3.28.4-0ubuntu0.14.04.3","2:3.28.4-0ubuntu0.14.04.4"],"ecosystem_specific":{"availability":"No subscription required","binaries":[{"binary_version":"2:3.28.4-0ubuntu0.14.04.5","binary_name":"libnss3"},{"binary_version":"2:3.28.4-0ubuntu0.14.04.5","binary_name":"libnss3-1d"},{"binary_version":"2:3.28.4-0ubuntu0.14.04.5","binary_name":"libnss3-nssdb"},{"binary_version":"2:3.28.4-0ubuntu0.14.04.5","binary_name":"libnss3-tools"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2018/UBUNTU-CVE-2018-18508.json"}},{"package":{"name":"nss","ecosystem":"Ubuntu:16.04:LTS","purl":"pkg:deb/ubuntu/nss@2:3.28.4-0ubuntu0.16.04.5?arch=source&distro=xenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2:3.28.4-0ubuntu0.16.04.5"}]}],"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","2:3.26.2-0ubuntu0.16.04.2","2:3.28.4-0ubuntu0.16.04.1","2:3.28.4-0ubuntu0.16.04.2","2:3.28.4-0ubuntu0.16.04.3","2:3.28.4-0ubuntu0.16.04.4"],"ecosystem_specific":{"availability":"No subscription required","binaries":[{"binary_version":"2:3.28.4-0ubuntu0.16.04.5","binary_name":"libnss3"},{"binary_version":"2:3.28.4-0ubuntu0.16.04.5","binary_name":"libnss3-1d"},{"binary_version":"2:3.28.4-0ubuntu0.16.04.5","binary_name":"libnss3-nssdb"},{"binary_version":"2:3.28.4-0ubuntu0.16.04.5","binary_name":"libnss3-tools"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2018/UBUNTU-CVE-2018-18508.json"}},{"package":{"name":"nss","ecosystem":"Ubuntu:18.04:LTS","purl":"pkg:deb/ubuntu/nss@2:3.35-2ubuntu2.2?arch=source&distro=bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2:3.35-2ubuntu2.2"}]}],"versions":["2:3.32-1ubuntu3","2:3.34-1ubuntu1","2:3.35-2ubuntu2","2:3.35-2ubuntu2.1"],"ecosystem_specific":{"availability":"No subscription required","binaries":[{"binary_version":"2:3.35-2ubuntu2.2","binary_name":"libnss3"},{"binary_version":"2:3.35-2ubuntu2.2","binary_name":"libnss3-tools"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2018/UBUNTU-CVE-2018-18508.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H"},{"type":"Ubuntu","score":"medium"}]}