{"id":"CVE-2018-12435","aliases":["ALPINE-CVE-2018-12435","DEBIAN-CVE-2018-12435","EUVD-2018-4406","GHSA-xwpq-mm7j-gvv6","openSUSE-SU-2024:10594-1"],"status":"published","title":"Botan 2.5.0 through 2.6.0 before 2.7.0 allows a memory-cache side-channel attack on ECDSA...","description":"Botan 2.5.0 through 2.6.0 before 2.7.0 allows a memory-cache side-channel attack on ECDSA signatures, aka the Return Of the Hidden Number Problem or ROHNP, related to dsa/dsa.cpp, ec_group/ec_group.cpp, and ecdsa/ecdsa.cpp. To discover an ECDSA key, the attacker needs access to either the local machine or a different virtual machine on the same physical host.","severity":{"version":"3.0","score":5.9,"vector":"CVSS:3.0/AV:L/AC:H/PR:N/UI:N/S:C/C:H/I:N/A:N","level":"medium","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-08","score":0.00492,"percentile":0.42514,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-200"],"published":"2018-06-15T02:00:00Z","modified":"2026-10-23T18:03:46Z","fixes":[{"ecosystem":"Alpine:v3.11","package":"botan","fixed_in":["2.7.0-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.12","package":"botan","fixed_in":["2.7.0-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.13","package":"botan","fixed_in":["2.7.0-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.14","package":"botan","fixed_in":["2.7.0-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.15","package":"botan","fixed_in":["2.7.0-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.16","package":"botan","fixed_in":["2.7.0-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.17","package":"botan","fixed_in":["2.7.0-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.18","package":"botan","fixed_in":["2.7.0-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.19","package":"botan","fixed_in":["2.7.0-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.20","package":"botan","fixed_in":["2.7.0-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.21","package":"botan","fixed_in":["2.7.0-r0"],"sources":["osv"]},{"ecosystem":"Debian:12","package":"botan","fixed_in":["2.6.0-3"],"sources":["osv"]},{"ecosystem":"Debian:13","package":"botan","fixed_in":["2.6.0-3"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Alpine:v3.11","package":"botan","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"2.5.0"},{"fixed":"2.7.0-r0"}]}]},{"source":"osv","ecosystem":"Alpine:v3.12","package":"botan","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"2.5.0"},{"fixed":"2.7.0-r0"}]}]},{"source":"osv","ecosystem":"Alpine:v3.13","package":"botan","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"2.5.0"},{"fixed":"2.7.0-r0"}]}]},{"source":"osv","ecosystem":"Alpine:v3.14","package":"botan","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"2.5.0"},{"fixed":"2.7.0-r0"}]}]},{"source":"osv","ecosystem":"Alpine:v3.15","package":"botan","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"2.5.0"},{"fixed":"2.7.0-r0"}]}]},{"source":"osv","ecosystem":"Alpine:v3.16","package":"botan","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"2.5.0"},{"fixed":"2.7.0-r0"}]}]},{"source":"osv","ecosystem":"Alpine:v3.17","package":"botan","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"2.5.0"},{"fixed":"2.7.0-r0"}]}]},{"source":"osv","ecosystem":"Alpine:v3.18","package":"botan","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"2.5.0"},{"fixed":"2.7.0-r0"}]}]},{"source":"osv","ecosystem":"Alpine:v3.19","package":"botan","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"2.5.0"},{"fixed":"2.7.0-r0"}]}]},{"source":"osv","ecosystem":"Alpine:v3.20","package":"botan","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"2.5.0"},{"fixed":"2.7.0-r0"}]}]},{"source":"osv","ecosystem":"Alpine:v3.21","package":"botan","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"2.5.0"},{"fixed":"2.7.0-r0"}]}]},{"source":"osv","ecosystem":"Debian:12","package":"botan","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.6.0-3"}]}]},{"source":"osv","ecosystem":"Debian:13","package":"botan","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.6.0-3"}]}]},{"source":"osv","ecosystem":"openSUSE:Tumbleweed","package":"Botan","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.18.1-1.3"}]}],"bundled":7}],"products":[{"vendor":"botan_project","product":"botan"}],"references":[{"url":"https://www.nccgroup.trust/us/our-research/technical-advisory-return-of-the-hidden-number-problem/","tags":["x_refsource_MISC","x_transferred","Exploit","Third Party Advisory","evidence"]},{"url":"https://botan.randombit.net/security.html","tags":["x_refsource_CONFIRM","x_transferred","Third Party Advisory","advisory"]},{"url":"https://github.com/randombit/botan/commit/48fc8df51d99f9d8ba251219367b3d629cc848e3","tags":["x_refsource_CONFIRM","x_transferred","Patch","Third Party Advisory","fix"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2018-12435"},{"url":"https://github.com/advisories/GHSA-xwpq-mm7j-gvv6"},{"url":"https://security.alpinelinux.org/vuln/CVE-2018-12435","tags":["advisory"]},{"url":"https://security-tracker.debian.org/tracker/CVE-2018-12435","tags":["advisory"]},{"url":"","tags":["advisory"]},{"url":"https://www.suse.com/security/cve/CVE-2016-9132","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2017-14737","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2017-2801","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2018-12435","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2018-20187","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2018-9127","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2018-9860","tags":["web"]}],"sources":{"cve":[{"id":"CVE-2018-12435","description":"Botan 2.5.0 through 2.6.0 before 2.7.0 allows a memory-cache side-channel attack on ECDSA 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host.","status":"published","published":"2018-06-15T02:29:00.377Z","modified":"2026-10-20T13:46:32.351455916Z","cvss":[{"version":"3.0","score":5.9,"vector":"CVSS:3.0/AV:L/AC:H/PR:N/UI:N/S:C/C:H/I:N/A:N","level":"medium"}],"updated_at":"2026-11-02T15:44:07.934182Z"},{"id":"DEBIAN-CVE-2018-12435","description":"Botan 2.5.0 through 2.6.0 before 2.7.0 allows a memory-cache side-channel attack on ECDSA signatures, aka the Return Of the Hidden Number Problem or ROHNP, related to dsa/dsa.cpp, ec_group/ec_group.cpp, and ecdsa/ecdsa.cpp. To discover an ECDSA key, the attacker needs access to either the local machine or a different virtual machine on the same physical host.","status":"published","published":"2018-06-15T02:29:00.377Z","modified":"2026-10-23T18:03:46.898452309Z","cvss":[{"version":"3.0","score":5.9,"vector":"CVSS:3.0/AV:L/AC:H/PR:N/UI:N/S:C/C:H/I:N/A:N","level":"medium"}],"updated_at":"2026-11-02T15:45:30.290351Z"},{"id":"openSUSE-SU-2024:10594-1","title":"Botan-2.18.1-1.3 on GA media","description":"These are all security issues fixed in the Botan-2.18.1-1.3 package on the GA media of openSUSE Tumbleweed.","status":"published","published":"2024-06-15T00:00:00Z","modified":"2026-02-04T03:20:29.939433Z","updated_at":"2026-11-02T16:58:34.487567Z"}]}}