|Description||The ElGamal implementation in Libgcrypt before 1.9.4 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.|
|Source||CVE (at NVD; CERT, LWN, oss-sec, fulldisc, bugtraq, EDB, Metasploit, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, Mageia, GitHub code/issues, web search, more)|
Vulnerable and fixed packages
The table below lists information on source packages.
The information below is based on the following data on fixed versions.
|Package||Type||Release||Fixed Version||Urgency||Origin||Debian Bugs|
[bullseye] - libgcrypt20 <no-dsa> (Minor issue)
[buster] - libgcrypt20 <no-dsa> (Minor issue)
[stretch] - libgcrypt20 <no-dsa> (Minor issue)
Related to CVE-2021-33560, but not a duplicate. Unfortunately scope of CVE-2021-33560 and
CVE-2021-40528 got switched at some point, and CVE-2021-33560 referring to the blinding
hardening. We keep the original association as per 2021-09-19 (until MITRE clarifies on