Crypto++ through 8.4 contains a timing side channel in ECDSA signature generation. Function FixedSizeAllocatorWithCleanup could write to memory outside of the allocation if the allocated memory was not 16-byte aligned. NOTE: this issue exists because the CVE-2019-14318 fix was intentionally removed for functionality reasons.
The product writes data past the end, or before the beginning, of the intended buffer.
Link | Tags |
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https://github.com/weidai11/cryptopp/releases/tag/CRYPTOPP_8_4_0 | release notes |
https://github.com/weidai11/cryptopp/issues/992 | patch exploit vendor advisory issue tracking |