{"id":"USN-4891-1","summary":"openssl vulnerability","details":"It was discovered that OpenSSL incorrectly handled certain renegotiation\nClientHello messages. A remote attacker could use this issue to cause\nOpenSSL to crash, resulting in a denial of service.\n","modified":"2026-04-27T15:46:16.409341Z","published":"2021-03-25T14:29:46Z","related":["UBUNTU-CVE-2021-3449"],"upstream":["CVE-2021-3449","UBUNTU-CVE-2021-3449"],"references":[{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-4891-1"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2021-3449"}],"affected":[{"package":{"name":"openssl","ecosystem":"Ubuntu:18.04:LTS","purl":"pkg:deb/ubuntu/openssl@1.1.1-1ubuntu2.1~18.04.9?arch=source&distro=bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.1.1-1ubuntu2.1~18.04.9"}]}],"versions":["1.0.2g-1ubuntu13","1.0.2g-1ubuntu14","1.0.2n-1ubuntu1","1.1.0g-2ubuntu1","1.1.0g-2ubuntu2","1.1.0g-2ubuntu3","1.1.0g-2ubuntu4","1.1.0g-2ubuntu4.1","1.1.0g-2ubuntu4.3","1.1.1-1ubuntu2.1~18.04.1","1.1.1-1ubuntu2.1~18.04.2","1.1.1-1ubuntu2.1~18.04.3","1.1.1-1ubuntu2.1~18.04.4","1.1.1-1ubuntu2.1~18.04.5","1.1.1-1ubuntu2.1~18.04.6","1.1.1-1ubuntu2.1~18.04.7","1.1.1-1ubuntu2.1~18.04.8"],"ecosystem_specific":{"binaries":[{"binary_version":"1.1.1-1ubuntu2.1~18.04.9","binary_name":"libssl1.1"},{"binary_version":"1.1.1-1ubuntu2.1~18.04.9","binary_name":"openssl"}],"availability":"No subscription required"},"database_specific":{"cves_map":{"ecosystem":"Ubuntu:18.04:LTS","cves":[{"id":"CVE-2021-3449","severity":[{"score":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H","type":"CVSS_V3"},{"score":"high","type":"Ubuntu"}]}]},"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-4891-1.json"}},{"package":{"name":"openssl","ecosystem":"Ubuntu:20.04:LTS","purl":"pkg:deb/ubuntu/openssl@1.1.1f-1ubuntu2.3?arch=source&distro=focal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.1.1f-1ubuntu2.3"}]}],"versions":["1.1.1c-1ubuntu4","1.1.1d-2ubuntu3","1.1.1d-2ubuntu6","1.1.1f-1ubuntu1","1.1.1f-1ubuntu2","1.1.1f-1ubuntu2.1","1.1.1f-1ubuntu2.2"],"ecosystem_specific":{"binaries":[{"binary_version":"1.1.1f-1ubuntu2.3","binary_name":"libssl1.1"},{"binary_version":"1.1.1f-1ubuntu2.3","binary_name":"openssl"}],"availability":"No subscription required"},"database_specific":{"cves_map":{"ecosystem":"Ubuntu:20.04:LTS","cves":[{"id":"CVE-2021-3449","severity":[{"score":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H","type":"CVSS_V3"},{"score":"high","type":"Ubuntu"}]}]},"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-4891-1.json"}}],"schema_version":"1.7.5"}