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CVE-2018-12435

Status Candidate

Overview

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.

Related Files

Botan C++ Crypto Algorithms Library 2.7.0
Posted Jul 3, 2018
Site botan.randombit.net

Botan is a C++ library of cryptographic algorithms, including AES, DES, SHA-1, RSA, DSA, Diffie-Hellman, and many others. It also supports X.509 certificates and CRLs, and PKCS #10 certificate requests, and has a high level filter/pipe message processing system. The library is easily portable to most systems and compilers, and includes a substantial tutorial and API reference. This is the current stable release.

Changes: Avoided a side channel in ECDSA signature generation. Various other updates.
tags | library
advisories | CVE-2018-12435
SHA-256 | e42df91556317588c6ca0e41bf796f9bd5ec5c70e0668e6c97c608c697c24a90
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