|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.|
|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] - botan <no-dsa> (Minor issue)
[buster] - botan <no-dsa> (Minor issue)
[stretch] - botan1.10 <ignored> (Affected function encrypt(...) has changed drastically. Backport is too instrusive to backport)
Fixed by: https://github.com/randombit/botan/commit/9a23e4e3bc3966340531f2ff608fa9d33b5185a2