CVE-2024-50383 — Observable Discrepancy in Project Botan
Severity
5.9MEDIUMNVD
OSV5.3
EPSS
0.2%
top 61.40%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
Timeline
PublishedOct 23
Latest updateJun 23
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.)
CVSS vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:NExploitability: 2.2 | Impact: 3.6