Lasso all versions prior to 2.7.0 has improper verification of a cryptographic signature.
https://www.debian.org/security/2021/dsa-4926
https://lists.debian.org/debian-lts-announce/2021/06/msg00013.html
https://git.entrouvert.org/lasso.git/tree/NEWS?id=v2.7.0
https://git.entrouvert.org/lasso.git/commit/?id=076a37d7f0eb74001127481da2d355683693cde9