Missing error check in do_verify, which might allow remote attackers to bypass validation of the certificate chain via a malformed SSL/TLS signature.
To install Crypt::OpenSSL::DSA, copy and paste the appropriate command in to your terminal.
cpanm
cpanm Crypt::OpenSSL::DSA
CPAN shell
perl -MCPAN -e shell install Crypt::OpenSSL::DSA
For more information on module installation, please visit the detailed CPAN module installation guide.