A flaw was found in a way Red Hat Certificate System handled Extensions in the certificate signing requests (CSR). All requested Extensions were added to issued certificate despite constraints defined in Certificate Authority (CA) profile.

For example, CSR could contain Basic Constraints or Key Usage constraint that once copied to issued certificate would result in creation of subordinate CA certificate, even though CA configuration prohibits issuing of subordinate CA certificate, possibly leading to a bypass the intended security policy.

Affected versions: Red Hat Certificate System 7.1, 7.2, 7.3 Netscape Certificate Management System 6.x