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...the complexity > requirements imposed by the installer are really worth much against > the pre-hashed lists that would be used to match up the shadow > contents. Rainbow tables don?t help against salted hashes. Rainbow tables are for attacking *un*salted hashes, like NTLM used. https://crackstation.net/hashing-security.htm When the hashes are properly salted, the only option is brute force. All having /etc/shadow does for you is let you make billions of guesses per second instead of 5 guesses per minute, as you get with proper throttling on remote login avenues.

On Wed, Feb 4, 2015 at 4:55 PM, Warren Young <wyml at etr-usa.com> wrote: >>> >> There have been remotely exploitable vulnerabilities where an arbitrary file could be read > > CVEs, please? > > I?m aware of vulnerabilities that allow a remote read of arbitrary files that are readable by the exploited process?s user, but for such an exploit to work on /etc/shadow,