oss-sec mailing list archives
Re: Re: ImageMagick: CVE-2017-9098: use of uninitialized memory in RLE decoder
From: Leo Famulari <leo () famulari name>
Date: Sat, 20 May 2017 13:54:36 -0400
On Sat, May 20, 2017 at 08:26:36AM -0700, Ian Zimmerman wrote:
On 2017-05-20 09:26, Salvatore Bonaccorso wrote:Chris Evans discovered that ImageMagick uses unitialized memory in the RLE decoder, allowing an attacker to leak sensitive information from process memory space. There is missing initialization in the ReadRLEImage function. Original article at: https://scarybeastsecurity.blogspot.com/2017/05/bleed-continues-18-byte-file-14k-bounty.htmlIt was good to see the discussion of how GraphicsMagick was affected, or not. I would love to see that in all *Magick weakness reports.
Chris Evans' report (copied in the email you replied to) says this: GraphicsMagick vs. ImageMagick, again. Well, well, look at this :) GraphicsMagick fixed this issue in March 2016, for the v1.3.24 release, tucked away in a changeset titled "Fix SourceForge bug #371 "out-of-bounds read in coders/rle.c:633:39" (see the second memset()). This is another case where tons of vulnerabilities are being found and fixed in both GraphicsMagick and ImageMagick with little co-ordination. This seems like a waste of effort and a risk of 0-day (or is it 1-day?) exposure. It goes both ways: the RLE memory corruption I referenced in my previous blog post was only fixed in GraphicsMagick in March 2016, having been previously fixed in ImageMagick in Dec 2014.
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Current thread:
- ImageMagick: CVE-2017-9098: use of uninitialized memory in RLE decoder Salvatore Bonaccorso (May 20)
- Re: ImageMagick: CVE-2017-9098: use of uninitialized memory in RLE decoder Ian Zimmerman (May 20)
- Re: Re: ImageMagick: CVE-2017-9098: use of uninitialized memory in RLE decoder Leo Famulari (May 20)
- Re: Re: ImageMagick: CVE-2017-9098: use of uninitialized memory in RLE decoder Bob Friesenhahn (May 20)
- Re: Re: ImageMagick: CVE-2017-9098: use of uninitialized memory in RLE decoder Thomas Deutschmann (May 22)
- Re: Re: ImageMagick: CVE-2017-9098: use of uninitialized memory in RLE decoder Bob Friesenhahn (May 22)
- Re: Re: ImageMagick: CVE-2017-9098: use of uninitialized memory in RLE decoder Solar Designer (May 23)
- Re: Re: ImageMagick: CVE-2017-9098: use of uninitialized memory in RLE decoder Thomas Deutschmann (May 23)
- Re: Re: ImageMagick: CVE-2017-9098: use of uninitialized memory in RLE decoder Bob Friesenhahn (May 23)
- Re: Re: ImageMagick: CVE-2017-9098: use of uninitialized memory in RLE decoder Leo Famulari (May 20)
- Re: ImageMagick: CVE-2017-9098: use of uninitialized memory in RLE decoder Ian Zimmerman (May 20)
- Re: Re: ImageMagick: CVE-2017-9098: use of uninitialized memory in RLE decoder Jodie Cunningham (May 22)