Untriaged
Compiler-induced timing leak in sp_256_get_entry_256_9 on RISC-V
In wolfSSL 5.8.4, constant-time masking logic in sp_256_get_entry_256_9 is optimized into conditional branches (bnez) by GCC when targeting RISC-V RV32I with -O3. This transformation breaks the side-channel resistance of ECC scalar multiplication, potentially allowing a local attacker to recover secret keys via timing analysis.
References
Affected products
wolfSSL
- <5.9.0
Package maintainers
-
@vifino Adrian Pistol <vifino@tty.sh>
-
@fabaff Fabian Affolter <mail@fabian-affolter.ch>