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Fortify Sample C++ Demo

This sample demonstrates a simple dataflow vulnerability in C++ code. The code in sample.cpp is intended to be a simple shell program; it reads user input, checks that the user is running a safe program, and runs that program. However, if the user specified a command such as "safe_program ; dangerous_program", then the dangerous program would be executed by the system() call.

Fortify SCA results should contain vulnerabilities with the following categories:

  • Command Injection
  • Memory Leak
  • Other vulnerabilities might also be found depending on the versions of Rulepacks used in the scan.

The Command Injection vulnerability indicates that user input comes from a call to getline() on line 16 and is then passed to argument 0 of the system() call on line 21. This is due to the absence of appropriate input length checks.

To run the scan:

First clean up any existing data from a previous build and scan:

sourceanalyzer -b sample-cpp -clean
msbuild ALL_BUILD.vcxproj -t:Clean

Next, translate the source files by prepending the sourceanalyzer command:

sourceanalyzer -b sample-cpp msbuild ALL_BUILD.vcxproj

Then, execute the scan on the translated files:

sourceanalyzer -b sample-cpp -scan -verbose -f sample-cpp.fpr

Finally, view the results in AuditWorkbench:

auditworkbench sample-cpp.fpr

You can also use ScanCentral by first creating a mobile build solution (mbs) and then uploading it:

sourceanalyzer -b sample-cpp -export-build-session sample-cpp.mbs
scancentral -url $ScanCentralCtrlUrl start -upload -uptoken $SSCAuthToken `
    -b sample-cpp -application sample-cpp -version 1.0 -mbs sample-cpp.mbs `
    -email $ScanCentralEmail -block -o -f sample-cpp.fpr