libpreloadvaccine is a project to attempt whitelisting of shared objects loaded via LD_PRELOAD.
This libary implements portions of the rtld-audit API to intercept searches for shared objects at runtime. If the searched-for library is part of a preload list and not part of the whitelist, it gets ignored by the dynamic linker at runtime.
To use the library, simply define the LD_AUDIT environment variable to the path of libpreloadvaccine.so and enjoy.
To whitelist preloads, add them to /etc/libpreloadvaccine.allow.
Like a real vaccine, this is not 100% effective against all types of preloads attacks. You may still define preloads via command line arguments to the dymanic linker for effect. And just like a vaccine, this is better than running around without protection!
