{"id":"UBUNTU-CVE-2016-2849","details":"Botan before 1.10.13 and 1.11.x before 1.11.29 do not use a constant-time algorithm to perform a modular inverse on the signature nonce k, which might allow remote attackers to obtain ECDSA secret keys via a timing side-channel attack.","modified":"2026-04-22T10:39:32.635291Z","published":"2016-05-13T14:59:00Z","upstream":["CVE-2016-2849"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2016-2849"},{"type":"REPORT","url":"http://botan.randombit.net/security.html"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2016-2849"}],"affected":[{"package":{"name":"botan1.10","ecosystem":"Ubuntu:14.04:LTS","purl":"pkg:deb/ubuntu/botan1.10@1.10.5-1+deb7u1ubuntu0.14.04.1?arch=source&distro=trusty"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.10.5-1+deb7u1ubuntu0.14.04.1"}]}],"versions":["1.10.5-1","1.10.5-1ubuntu1"],"ecosystem_specific":{"availability":"No subscription required","binaries":[{"binary_name":"libbotan-1.10-0","binary_version":"1.10.5-1+deb7u1ubuntu0.14.04.1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2016/UBUNTU-CVE-2016-2849.json"}},{"package":{"name":"botan1.10","ecosystem":"Ubuntu:16.04:LTS","purl":"pkg:deb/ubuntu/botan1.10@1.10.12-1?arch=source&distro=xenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.10.10-6","1.10.12-1"],"ecosystem_specific":{"binaries":[{"binary_name":"libbotan-1.10-1","binary_version":"1.10.12-1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2016/UBUNTU-CVE-2016-2849.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N"},{"type":"Ubuntu","score":"medium"}]}