cpe:/a:botan_project:botan:2.5.0 cpe:/a:botan_project:botan:2.6.0 cpe:/a:botan_project:botan:2.7.0 CVE-2018-12435 2018-06-14T22:29:00.377-04:00 2018-08-22T15:57:41.990-04:00 1.9 LOCAL MEDIUM NONE PARTIAL NONE NONE http://nvd.nist.gov 2018-08-02T15:25:12.410-04:00 CONFIRM https://botan.randombit.net/security.html CONFIRM https://github.com/randombit/botan/commit/48fc8df51d99f9d8ba251219367b3d629cc848e3 MISC https://www.nccgroup.trust/us/our-research/technical-advisory-return-of-the-hidden-number-problem/ 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.