/usr/lib/perl5/WebAuth/ is in libwebauth-perl 4.5.5-2.
This file is owned by root:root, with mode 0o755.
..
/usr/lib/perl5/WebAuth/Exception.pm
/usr/lib/perl5/WebAuth/Key.pm
/usr/lib/perl5/WebAuth/Keyring.pm
/usr/lib/perl5/WebAuth/KeyringEntry.pod
/usr/lib/perl5/WebAuth/Krb5.pm
/usr/lib/perl5/WebAuth/Tests.pm
/usr/lib/perl5/WebAuth/Token/
/usr/lib/perl5/WebAuth/Token.pm
/usr/lib/perl5/WebAuth/Token/App.pm
/usr/lib/perl5/WebAuth/Token/Cred.pm
/usr/lib/perl5/WebAuth/Token/Error.pm
/usr/lib/perl5/WebAuth/Token/Id.pm
/usr/lib/perl5/WebAuth/Token/Login.pm
/usr/lib/perl5/WebAuth/Token/Proxy.pm
/usr/lib/perl5/WebAuth/Token/Request.pm
/usr/lib/perl5/WebAuth/Token/WebKDCFactor.pm
/usr/lib/perl5/WebAuth/Token/WebKDCProxy.pm
/usr/lib/perl5/WebAuth/Token/WebKDCService.pm