A vulnerability was found in a way the ECDH encryption algorithm decrypts data. An attacker with a specialised setup can extract the secret decryption key from a target located in an adjacent room within seconds. This is done by measuring the target's electromagnetic emanations.
Created libgcrypt tracking bugs for this issue:
Affects: fedora-all [bug 1306185]
Created mingw-libgcrypt tracking bugs for this issue:
Affects: fedora-all [bug 1306186]
Affects: epel-7 [bug 1306187]
Upstream bug fix:
The preferred way to protect against this vulnerability is to update to the new package version.
libgcrypt-1.6.5-1.fc24 has been pushed to the Fedora 24 stable repository. If problems still persist, please make note of it in this bug report.
libgcrypt-1.6.5-1.fc23 has been pushed to the Fedora 23 stable repository. If problems still persist, please make note of it in this bug report.