{"id":"USN-6727-1","summary":"nss vulnerabilities","details":"It was discovered that NSS incorrectly handled padding when checking PKCS#1\ncertificates. A remote attacker could possibly use this issue to perform\nBleichenbacher-like attacks and recover private data. This issue only\naffected Ubuntu 20.04 LTS. (CVE-2023-4421)\n\nIt was discovered that NSS had a timing side-channel when performing RSA\ndecryption. A remote attacker could possibly use this issue to recover\nprivate data. (CVE-2023-5388)\n\nIt was discovered that NSS had a timing side-channel when using certain\nNIST curves. A remote attacker could possibly use this issue to recover\nprivate data. (CVE-2023-6135)\n\nThe NSS package contained outdated CA certificates. This update refreshes\nthe NSS package to version 3.98 which includes the latest CA certificate\nbundle and other security improvements.\n","modified":"2026-04-27T16:50:23.596489Z","published":"2024-04-10T13:40:08Z","related":["UBUNTU-CVE-2023-4421","UBUNTU-CVE-2023-5388","UBUNTU-CVE-2023-6135"],"upstream":["CVE-2023-4421","CVE-2023-5388","CVE-2023-6135","UBUNTU-CVE-2023-4421","UBUNTU-CVE-2023-5388","UBUNTU-CVE-2023-6135"],"references":[{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-6727-1"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2023-4421"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2023-5388"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2023-6135"}],"affected":[{"package":{"name":"nss","ecosystem":"Ubuntu:20.04:LTS","purl":"pkg:deb/ubuntu/nss@2:3.98-0ubuntu0.20.04.1?arch=source&distro=focal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2:3.98-0ubuntu0.20.04.1"}]}],"versions":["2:3.45-1ubuntu2","2:3.47-1ubuntu1","2:3.47-1ubuntu2","2:3.48-1ubuntu1","2:3.49.1-1ubuntu1","2:3.49.1-1ubuntu1.1","2:3.49.1-1ubuntu1.2","2:3.49.1-1ubuntu1.4","2:3.49.1-1ubuntu1.5","2:3.49.1-1ubuntu1.6","2:3.49.1-1ubuntu1.7","2:3.49.1-1ubuntu1.8","2:3.49.1-1ubuntu1.9"],"ecosystem_specific":{"availability":"No subscription required","binaries":[{"binary_name":"libnss3","binary_version":"2:3.98-0ubuntu0.20.04.1"},{"binary_name":"libnss3-tools","binary_version":"2:3.98-0ubuntu0.20.04.1"}]},"database_specific":{"cves_map":{"cves":[{"severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N"},{"type":"Ubuntu","score":"medium"}],"id":"CVE-2023-4421"},{"severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L"},{"type":"Ubuntu","score":"medium"}],"id":"CVE-2023-5388"},{"severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N"},{"type":"Ubuntu","score":"medium"}],"id":"CVE-2023-6135"}],"ecosystem":"Ubuntu:20.04:LTS"},"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-6727-1.json"}},{"package":{"name":"nss","ecosystem":"Ubuntu:22.04:LTS","purl":"pkg:deb/ubuntu/nss@2:3.98-0ubuntu0.22.04.1?arch=source&distro=jammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2:3.98-0ubuntu0.22.04.1"}]}],"versions":["2:3.68-1ubuntu1","2:3.68-1ubuntu2","2:3.68.2-0ubuntu1","2:3.68.2-0ubuntu1.1","2:3.68.2-0ubuntu1.2"],"ecosystem_specific":{"availability":"No subscription required","binaries":[{"binary_name":"libnss3","binary_version":"2:3.98-0ubuntu0.22.04.1"},{"binary_name":"libnss3-tools","binary_version":"2:3.98-0ubuntu0.22.04.1"}]},"database_specific":{"cves_map":{"cves":[{"severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L"},{"type":"Ubuntu","score":"medium"}],"id":"CVE-2023-5388"},{"severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N"},{"type":"Ubuntu","score":"medium"}],"id":"CVE-2023-6135"}],"ecosystem":"Ubuntu:22.04:LTS"},"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-6727-1.json"}}],"schema_version":"1.7.5"}