CVEs-PoC/2021/CVE-2021-40529.md

CVE-2021-40529

Description

The ElGamal implementation in Botan through 2.18.1, as used in Thunderbird and other products, 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.