Upstream information

CVE-2021-40529 at MITRE


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.

SUSE information

Overall state of this security issue: Does not affect SUSE products

This issue is currently rated as having low severity.

SUSE Bugzilla entry: 1190244 [NEW]

No SUSE Security Announcements cross referenced.

List of released packages

Product(s) Fixed package version(s) References
openSUSE Tumbleweed
  • Botan >= 2.18.2-1.1
  • Botan-doc >= 2.18.2-1.1
  • libbotan-2-18 >= 2.18.2-1.1
  • libbotan-2-18-32bit >= 2.18.2-1.1
  • libbotan-devel >= 2.18.2-1.1
  • libbotan-devel-32bit >= 2.18.2-1.1
  • python3-botan >= 2.18.2-1.1
openSUSE Tumbleweed GA Botan-2.18.2-1.1

Status of this issue by product and package

Please note that this evaluation state might be work in progress, incomplete or outdated. Also information for service packs in the LTSS phase is only included for issues meeting the LTSS criteria. If in doubt, feel free to contact us for clarification.

Product(s) Source package State
SUSE Linux Enterprise Workstation Extension 15 SP2 MozillaThunderbird Analysis
SUSE Linux Enterprise Workstation Extension 15 SP3 MozillaThunderbird Analysis