GnuTLS before 3.3.13 does not validate that the signature algorithms match when importing a certificate.
{ "availability": "No subscription required", "ubuntu_priority": "low", "binaries": [ { "gnutls26-doc": "2.12.23-12ubuntu2.2", "libgnutls26-dbg": "2.12.23-12ubuntu2.2", "libgnutlsxx27": "2.12.23-12ubuntu2.2", "libgnutls26": "2.12.23-12ubuntu2.2", "gnutls-bin": "3.0.11+really2.12.23-12ubuntu2.2", "libgnutls-openssl27": "2.12.23-12ubuntu2.2", "libgnutls-dev": "2.12.23-12ubuntu2.2" } ] }