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.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Alpine Linux | — | Upgrade libgcrypt | Aug 30, 2017 | Jun 10, 2017 |
| Debian | — | Upgrade libgcrypt20 | Jun 15, 2017 | Jun 10, 2017 |
| Oracle Solaris | — | Upgrade system/library/security/libgcrypt to version 1.7.9-0.175.3.27.0.4.0 on Solaris 11.3 | Dec 19, 2017 | Jun 10, 2017 |
| Suse | — | Upgrade libgcrypt-develUpgrade libgcrypt20Upgrade libgcrypt20-hmac-32bitUpgrade libgcrypt20-hmacUpgrade libgcrypt20-32bit | Jun 19, 2017 | Jun 10, 2017 |
| Ubuntu | — | Upgrade libgcrypt20 | Jul 4, 2017 | Jun 10, 2017 |
| Vmware Photon_os | — | Use 'tdnf update' to upgrade all packages to the latest version. | Jan 20, 2025 | Jun 11, 2017 |
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