| lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
|
Open Source and information security mailing list archives
| ||
|
Date: Sat, 29 Sep 2007 00:32:41 +0530 From: "Jimby Sharp" <jimbysharp@...il.com> To: "Michal Zalewski" <lcamtuf@...ne.cc> Cc: full-disclosure@...ts.grok.org.uk, carl hardwick <hardwick.carl@...il.com> Subject: Re: Firefox 2.0.0.7 has a very serious calculation bug Michal I don't get the same from C-style double arithmetics. Could you provide a sample code that you believe should show the same behavior? On 9/28/07, Michal Zalewski <lcamtuf@...ne.cc> wrote: > On Fri, 28 Sep 2007, carl hardwick wrote: > > > javascript:5.2-0.1 > > Firefox 2.0.0.7 result: 5.1000000000000005 (WRONG!) > > This is a proper behavior of IEEE 754 64-bit double float, which, IIRC, is > precisely what ECMA standard mandates. > > You will get the same from any C-style 'double' arithmetics. > > > Internet Explorer 7 result: 5.1 (OK) > > They use a marginally higher precision. Now try 5.002-.001 - chances are, > you will get 5.00999... > > Neither is a "very serious calculation bug". Javascript does not guarantee > - and nowhere actually delivers - arbitrary GMP-style precision. > > /mz > > _______________________________________________ > Full-Disclosure - We believe in it. > Charter: http://lists.grok.org.uk/full-disclosure-charter.html > Hosted and sponsored by Secunia - http://secunia.com/ > _______________________________________________ Full-Disclosure - We believe in it. Charter: http://lists.grok.org.uk/full-disclosure-charter.html Hosted and sponsored by Secunia - http://secunia.com/
Powered by blists - more mailing lists