Botan before 3.6.0, when certain LLVM versions are used, has compiler-induced secret-dependent control flow in lib/utils/ghash/ghash.cpp in GHASH in AES-GCM. There is a branch instead of an XOR with carry. This was observed for Clang in LLVM 15 on RISC-V.
CVSS Details
- CVSS 3.1 Base Score: 5.9
- CVSS 3.1 Vector: (CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N)
Covered by Rapid7
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Debian | — | Upgrade botan | May 15, 2025 | Oct 23, 2024 |
| Ubuntu | — | Upgrade botan (Ubuntu Pro)Upgrade libbotan-2-19Upgrade botanUpgrade python3-botan (Ubuntu Pro)Upgrade libbotan-2-19 (Ubuntu Pro)Upgrade python3-botanUpgrade libbotan-2-dev (Ubuntu Pro)Upgrade libbotan-2-dev | Jun 26, 2025 | Oct 23, 2024 |
Prioritise with Active Threat Intelligence
With curated Threat Intelligence, you can see which vulnerabilities truly put you at risk, prioritize what matters most, and act before attackers do.
Explore Intelligence Hub