CVE-2024-50382

Summary

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.

Affected Software

Weaknesses

• n/a

ADP Enrichment

CISA ADP Vulnrichment

• SSVC:
• Exploitation: poc
  • Automatable: no
  • Technical Impact: partial

References

• https://github.com/randombit/botan/commit/53b0cfde580e86b03d0d27a488b6c134f662e957
• https://github.com/randombit/botan/compare/3.5.0…3.6.0
• https://arxiv.org/pdf/2410.13489
• https://news.ycombinator.com/item?id=41887153

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