CVE-2024-50383 Information

Description

Botan before 3.6.0 when certain GCC versions are used has a compiler-induced secret-dependent operation in lib/utils/donna128.h in donna128 (used in Chacha-Poly1305 and x25519). An addition can be skipped if a carry is not set. This was observed for GCC 11.3.0 with -O2 on MIPS and GCC on x86-i386. (Only 32-bit processors can be affected.)

Reference

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