Build Security In (BSI) is a software assurance initiative of the U.S. Department of Homeland Security. At one point, they provided a set of C/C++ coding rules with a security focus. CodeSonar provides checks in support of most of these rules, and continues to provide those checks although the rules are no longer among the resources provided on the BSI website.
Relevant Warning Classes
The following PDF shows the CodeSonar warning classes that are associated with individual BSI rules and are matched with CodeSonar 6.2.