Date: Mon, 17 Nov 2014 07:59:14 +1100 From: Joshua Rogers <oss@...ernot.info> To: oss-security@...ts.openwall.com Subject: Re: Fuzzing findings (and maybe CVE requests) - Image/GraphicsMagick, elfutils, GIMP, gdk-pixbuf, file, ndisasm, less On 17/11/14 07:43, Michal Zalewski wrote: >> However, even if tools like file/ndisasm/gimp/readelf can be used by >> > many (w/o strong system isolation boundaries) to analyze untrusted >> > inputs (for reverse engineering, malware analysis and similar >> > purposes) - I'd simply put a blame on those users > Well, it's always the easy option, but keep in mind that there are > countless tutorials that tell people to use 'file' or 'strings' to > examine sketchy file, or use tools such as objdump to do hobby > forensics. I agree with Michal on this. It's like saying Ritchie's fault for the fact that C does not have inbuilt bound checking, allowing for buffer overflows... I won't really expand on this, but my opinion is that _any_ program that is 'trusted', such as `file' and `strings', that contains a flaw in it that could pwn the running user, is a security risk. I'll also add, from the `file' manpage: > There has been a file command in every UNIX since at least Research > Version 4 (man page dated November, 1973). The System V version intro‐ > duced one significant major change: the external list of magic > types. This slowed the program down slightly but made it a lot more > flexible. `file' is also used by internals of most programs that handle any input too. Or some variant of it(probably libmagic). And one last point.. `vlc' is used with untrusted input(i.e .mp4s, avis, mp3s, etc.). If somebody gets pwned because they try to watch a video they download, is it their fault?.. Thanks, -- -- Joshua Rogers <https://internot.info/>
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