Certificate authority Comodo issues eight certificates that include forbidden internal server names or reserved IP addresses. Certificate Authority/Browser Forum banned the use of such designations for certificates issued after Nov. 1, 2015. Comodo said it pushed out a hotfix within hours, contacted its affected customers, and revoked the certificates. The CA/B forum banned the practice of issuing certificates for internal servers that were not unique and exposed networks to man-in-the-middle attacks and other risks. The CAs is not alone among CAs that have issued such certificates.
Source: https://threatpost.com/comodo-issues-eight-forbidden-certificates/115311/