Bob - Exim would not be vulnerable to bash. If exim uses bash in a script, bash may be vulnerable. However, if bash is patched, other products using bash (like Exim, apache, etc.) would be safe as well.
That being said, and slightly off topic, it still may be vulnerable (and I think it is) to POODLE attacks aimed at SSLv3 support in services like exim, etc..
Bob - Exim would not be vulnerable to bash. If exim uses bash in a script, bash may be vulnerable. However, if bash is patched, other products using bash (like Exim, apache, etc.) would be safe as well.
That being said, and slightly off topic, it still may be vulnerable (and I think it is) to POODLE attacks aimed at SSLv3 support in services like exim, etc..