An issue was discovered in wolfSSL before 4.5.0, when single precision is not employed. Local attackers can conduct a cache-timing attack against public key operations. These attackers may already have obtained sensitive information if the affected system has been used for private key operations (e.g., signing with a private key).
Source: https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-15309
Reference (s):
- https://github.com/wolfSSL/wolfssl/releases/tag/v4.5.0-stable
- https://arxiv.org/abs/2008.12188