Medium severity5.9NVD Advisory· Published Jun 15, 2018· Updated Jun 17, 2026
CVE-2018-12435
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.
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Affected products
2- Range: 2.5.0 - 2.6.0
Patches
Vulnerability mechanics
References
3- github.com/randombit/botan/commit/48fc8df51d99f9d8ba251219367b3d629cc848e3nvdPatchThird Party Advisory
- www.nccgroup.trust/us/our-research/technical-advisory-return-of-the-hidden-number-problem/nvdExploitThird Party Advisory
- botan.randombit.net/security.htmlnvdThird Party Advisory
News mentions
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