Note:
This project will be discontinued after December 13, 2021. [more]
2017-06-11
In Libgcrypt before 1.7.7, an attacker who learns the EdDSA session key (from side-channel observation during the signing process) can easily recover the long-term secret key. 1.7.7 makes a cipher/ecc-eddsa.c change to store this session key in secure memory, to ensure that constant-time point operations are used in the MPI library.
Products | Libgcrypt |
Type | Information Exposure (CWE-200) |
First patch | - None (likely due to unavailable code) |
Links |
• https://www.oracle.com/technetwork/security-advisory/cpujan2019-5072801.html
• http://www.oracle.com/technetwork/security-advisory/cpujul2018-4258247.html • http://www.securityfocus.com/bid/99046 • https://git.gnupg.org/cgi-bin/gitweb.cgi?p=libgcrypt.git%3Ba=commit%3Bh=5a22de904a0a366ae79f03ff1e13a1232a89e26b • https://git.gnupg.org/cgi-bin/gitweb.cgi?p=libgcrypt.git%3Ba=commit%3Bh=f9494b3f258e01b6af8bd3941ce436bcc00afc56 |