Crypto++ 8.3.0 and earlier contains a timing side channel in ECDSA
signature generation. This allows a local or remote attacker, able to
measure the duration of hundreds to thousands of signing operations, to
compute the private key used. The issue occurs because scalar
multiplication in ecp.cpp (prime field curves, small leakage) and
algebra.cpp (binary field curves, large leakage) is not constant time and
leaks the bit length of the scalar among other information.
Upstream:released (5.6.4-9)
Ubuntu 12.04 ESM (Precise Pangolin):DNE
Ubuntu 14.04 ESM (Trusty Tahr):needed
Ubuntu 16.04 LTS (Xenial Xerus):needed
Ubuntu 18.04 LTS (Bionic Beaver):needed
Ubuntu 19.04 (Disco Dingo):needed
Ubuntu 19.10 (Eoan Ermine):not-affected (5.6.4-9)
Ubuntu 20.04 (Focal Fossa):not-affected (5.6.4-9)
More Information

Updated: 2019-12-05 20:00:10 UTC (commit 0aa5e7c87c8b55d2ec5c7f4ca1179cf75de91961)