{"cve":"CVE-2018-12435","nvd":{"published":"2018-06-15T02:29:00.377","modified":"2026-06-17T01:37:46.823","status":"Modified","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.","cvss_v4":null,"cvss_v3":{"version":"3.0","vector":"CVSS:3.0/AV:L/AC:H/PR:N/UI:N/S:C/C:H/I:N/A:N","score":5.9},"cwes":["CWE-200"],"references":["https://botan.randombit.net/security.html","https://github.com/randombit/botan/commit/48fc8df51d99f9d8ba251219367b3d629cc848e3","https://www.nccgroup.trust/us/our-research/technical-advisory-return-of-the-hidden-number-problem/","https://botan.randombit.net/security.html","https://github.com/randombit/botan/commit/48fc8df51d99f9d8ba251219367b3d629cc848e3"],"products":["botan_project:botan"],"source":"nvd","synced_at":"2026-10-19T20:51:47.459859389+00:00"},"epss":{"cve":"CVE-2018-12435","score":0.00492,"percentile":0.42262,"date":"2026-10-31"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}