cve/2021/CVE-2021-40530.md

CVE-2021-40530

Description

The ElGamal implementation in Crypto++ through 8.5 allows plaintext recovery because, during interaction between two cryptographic libraries, a certain dangerous combination of the prime defined by the receiver's public key, the generator defined by the receiver's public key, and the sender's ephemeral exponents can lead to a cross-configuration attack against OpenPGP.

POC

Reference

• https://ibm.github.io/system-security-research-updates/2021/07/20/insecurity-elgamal-pt1

Github

No PoCs found on GitHub currently.