Date: Tue, 19 May 2015 11:19:34 -0700 From: Stanislav Malyshev <smalyshev@...il.com> To: Andrea Palazzo <andrea.palazzo@...el.it> CC: oss-security@...ts.openwall.com, security@....net Subject: Re: CVE Request + Advisory: PHP str_repeat() sign mismatch based memory corruption Hi! > http://phpcrossref.com/xref/jpegmeta/EXIF.php.html, > https://code.google.com/p/zimbra-api-php/, > http://phpcrossref.com/xref/jpegmeta/XML.php.html) it is really likely > that it would end up processed by one of these functions (string > concatenation, for example). > > $makernote <http://phpcrossref.com/xref/jpegmeta/_variables/makernote.html> .= str_repeat <http://phpcrossref.com/xref/jpegmeta/_functions/str_repeat.html>("\x00",( $tiff_data <http://phpcrossref.com/xref/jpegmeta/_variables/tiff_data.html>[ 'Makernote_Tag' ][ 'Offset' ] - 8 ) ); OK, I guess with parsing external formats like EXIF it can happen, so while I'm still not sure about remote exploitation, remote triggering is a possibility, you've convinced me here. -- Stas Malyshev smalyshev@...il.com
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