ALT-PU-2022-1663-1
Closed vulnerabilities
Published: 2021-09-06
Modified: 2024-11-21
Modified: 2024-11-21
CVE-2021-40529
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.
Severity: MEDIUM (5.9)
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
References:
- https://eprint.iacr.org/2021/923
- https://eprint.iacr.org/2021/923
- https://github.com/randombit/botan/pull/2790
- https://github.com/randombit/botan/pull/2790
- https://ibm.github.io/system-security-research-updates/2021/07/20/insecurity-elgamal-pt1
- https://ibm.github.io/system-security-research-updates/2021/07/20/insecurity-elgamal-pt1
- https://ibm.github.io/system-security-research-updates/2021/09/06/insecurity-elgamal-pt2
- https://ibm.github.io/system-security-research-updates/2021/09/06/insecurity-elgamal-pt2
- FEDORA-2021-8d51cac49f
- FEDORA-2021-8d51cac49f
- FEDORA-2021-14b0d97496
- FEDORA-2021-14b0d97496
- GLSA-202208-14
- GLSA-202208-14