A vulnerability has been found and corrected in mozilla NSS: In a wildcard certificate, the wildcard character should not be embedded within the U-label of an internationalized domain name. See the last bullet point in RFC 6125, Section 7.2 . The updated packages have been upgraded to the latest NSPR and NSS versions which is not vulnerable to this issue. Additionally the rootcerts package has also been updated to version 1.97, which adds, removes, and distrusts several certificates.