I think application security on Linux compares well with that of Solaris or AIX. However, arbitrary comparisons like this are problematic and too generic.
How application security compares is dependent on how the Linux, Solaris and AIX hosts and their applications are configured, updated, managed and secured. In order to make a more accurate comparison, I'd need to know the applications in question, the precise operating system and some details about their configuration.
This was first published in April 2007