CVSS 3.0
5.9 mediumCVSS:3.0/AV:L/AC:H/PR:N/UI:N/S:C/C:H/I:N/A:NCVE-2018-12435
Medium (5.9) in botan project botan. EPSS 0.5% chance of exploitation in the next 30 days.
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
- EPSS
- 0.5% chance of exploitation in the next 30 days; higher than 42% of CVEs (scores of 2026-10-31)
- CWE
- CWE-200
- Published
- Modified
- Record from
- the NVD, synced
Affected
- botan_project:botan
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