Date: Thu, 18 Jun 2015 13:33:54 +0200 From: Frank Dittrich <frank.dittrich@...lbox.org> To: john-users@...ts.openwall.com Subject: Re: Using loopback with regex could cause crash On 05/25/2015 06:38 PM, Marek Wrzosek wrote: > If john.pot contains e.g. "." and john is started with --loopback > --rules=none --regex=case=alpha:case="\0" (--regex="\0" doesn't crash > with the same john.pot) then this could happen: > > buf=[sS][eE][xX][iI][sS] > buf=0 > buf=[jJ] > buf=[mM] > buf=[pP] > buf=2 > buf=9 > buf=[bB] > buf=[cC] > buf=[dD] > buf=[lL] > buf=[gG] > buf=[wW] > buf=. > error: syntax error, unexpected $end > Error, invalid regex expression. John exiting now base_word=. Regex= . Words containing '?' caused the same problem as words containing '.'. Turns out regex mode did already handle other special characters, so I just added handling '.' and '?' in a similar way. Commit https://github.com/magnumripper/JohnTheRipper/commit/b9ae4161c19576a99f9b1f79ed551170a042a894 fixes the issue. Frank
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