{"id":"UBUNTU-CVE-2018-10844","details":"It was found that the GnuTLS implementation of HMAC-SHA-256 was vulnerable to a Lucky thirteen style attack. Remote attackers could use this flaw to conduct distinguishing attacks and plaintext-recovery attacks via statistical analysis of timing data using crafted packets.","modified":"2026-02-04T03:52:36.560807Z","published":"2018-08-22T00:00:00Z","related":["USN-3999-1"],"upstream":["CVE-2018-10844"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2018-10844"},{"type":"REPORT","url":"https://eprint.iacr.org/2018/747"},{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-3999-1"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2018-10844"}],"affected":[{"package":{"name":"gnutls26","ecosystem":"Ubuntu:14.04:LTS","purl":"pkg:deb/ubuntu/gnutls26@2.12.23-12ubuntu2.8?arch=source&distro=trusty"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.12.23-1ubuntu4","2.12.23-1ubuntu5","2.12.23-12ubuntu1","2.12.23-12ubuntu2","2.12.23-12ubuntu2.1","2.12.23-12ubuntu2.2","2.12.23-12ubuntu2.3","2.12.23-12ubuntu2.4","2.12.23-12ubuntu2.5","2.12.23-12ubuntu2.6","2.12.23-12ubuntu2.7","2.12.23-12ubuntu2.8"],"ecosystem_specific":{"binaries":[{"binary_version":"3.0.11+really2.12.23-12ubuntu2.8","binary_name":"gnutls-bin"},{"binary_version":"2.12.23-12ubuntu2.8","binary_name":"libgnutls-dev"},{"binary_version":"2.12.23-12ubuntu2.8","binary_name":"libgnutls-openssl27"},{"binary_version":"2.12.23-12ubuntu2.8","binary_name":"libgnutls26"},{"binary_version":"2.12.23-12ubuntu2.8","binary_name":"libgnutlsxx27"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2018/UBUNTU-CVE-2018-10844.json"}},{"package":{"name":"gnutls28","ecosystem":"Ubuntu:16.04:LTS","purl":"pkg:deb/ubuntu/gnutls28@3.4.10-4ubuntu1.5?arch=source&distro=xenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.4.10-4ubuntu1.5"}]}],"versions":["3.3.15-5ubuntu2","3.3.18-1ubuntu1","3.3.20-1ubuntu1","3.4.9-2ubuntu1","3.4.10-4ubuntu1","3.4.10-4ubuntu1.1","3.4.10-4ubuntu1.2","3.4.10-4ubuntu1.3","3.4.10-4ubuntu1.4"],"ecosystem_specific":{"availability":"No subscription required","binaries":[{"binary_version":"3.4.10-4ubuntu1.5","binary_name":"gnutls-bin"},{"binary_version":"3.4.10-4ubuntu1.5","binary_name":"guile-gnutls"},{"binary_version":"3.4.10-4ubuntu1.5","binary_name":"libgnutls-dev"},{"binary_version":"3.4.10-4ubuntu1.5","binary_name":"libgnutls-openssl27"},{"binary_version":"3.4.10-4ubuntu1.5","binary_name":"libgnutls28-dev"},{"binary_version":"3.4.10-4ubuntu1.5","binary_name":"libgnutls30"},{"binary_version":"3.4.10-4ubuntu1.5","binary_name":"libgnutlsxx28"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2018/UBUNTU-CVE-2018-10844.json"}},{"package":{"name":"gnutls28","ecosystem":"Ubuntu:18.04:LTS","purl":"pkg:deb/ubuntu/gnutls28@3.5.18-1ubuntu1.1?arch=source&distro=bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.5.18-1ubuntu1.1"}]}],"versions":["3.5.8-6ubuntu3","3.5.17-1ubuntu1","3.5.17-1ubuntu3","3.5.18-1ubuntu1"],"ecosystem_specific":{"availability":"No subscription required","binaries":[{"binary_version":"3.5.18-1ubuntu1.1","binary_name":"gnutls-bin"},{"binary_version":"3.5.18-1ubuntu1.1","binary_name":"libgnutls-dane0"},{"binary_version":"3.5.18-1ubuntu1.1","binary_name":"libgnutls-openssl27"},{"binary_version":"3.5.18-1ubuntu1.1","binary_name":"libgnutls28-dev"},{"binary_version":"3.5.18-1ubuntu1.1","binary_name":"libgnutls30"},{"binary_version":"3.5.18-1ubuntu1.1","binary_name":"libgnutlsxx28"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2018/UBUNTU-CVE-2018-10844.json"}}],"schema_version":"1.7.3","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:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N"},{"type":"Ubuntu","score":"medium"}]}