CVEvulnerability
CVE-2018-12435
5.9 MEDIUM
Official page ↗
- Status
- Modified
- Published
- 2018-06-15
- Last modified
- 2026-06-17
- Assigner
- [email protected]
- CVSS 3.0 ([email protected])
- 5.9 MEDIUM — CVSS:3.0/AV:L/AC:H/PR:N/UI:N/S:C/C:H/I:N/A:N
- CVSS 2.0 ([email protected])
- 1.9 LOW — AV:L/AC:M/Au:N/C:P/I:N/A:N
- Weaknesses
- CWE-200
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.
Affected configurations
• botan project botan (>= 2.5.0 <= 2.7.0)
Related
Weakness · CWE (1)
- CWE-200 Exposure of Sensitive Information to an Unauthorized Actor weakness
References
- https://botan.randombit.net/security.html Third Party Advisory
- https://github.com/randombit/botan/commit/48fc8df51d99f9d8ba251219367b3d629cc848e3 Patch, Third Party Advisory
- https://www.nccgroup.trust/us/our-research/technical-advisory-return-of-the-hidden-number-problem/ Exploit, Third Party Advisory
- https://botan.randombit.net/security.html Third Party Advisory
- https://github.com/randombit/botan/commit/48fc8df51d99f9d8ba251219367b3d629cc848e3 Patch, Third Party Advisory
- https://www.nccgroup.trust/us/our-research/technical-advisory-return-of-the-hidden-number-problem/ Exploit, Third Party Advisory