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assertion failure in ReplaceImageInList #802

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bestshow opened this issue Sep 30, 2017 · 2 comments
Closed

assertion failure in ReplaceImageInList #802

bestshow opened this issue Sep 30, 2017 · 2 comments
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@bestshow
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Here is the critical code : (in MogrifyImageList)

            swap=CloneImage(p,0,0,MagickTrue,exception);                                
            ReplaceImageInList(&p,CloneImage(q,0,0,MagickTrue,exception));        //8794
            ReplaceImageInList(&q,swap);                  

CloneImage may return NULL (in line 8794),and in ReplaceImageInList:

MagickExport void ReplaceImageInList(Image **images,Image *replace)        //1144
{
  assert(images != (Image **) NULL);
  assert(replace != (Image *) NULL);        //1147

If the "replace" is NULL,it will may cause assertion failure.

@mikayla-grace
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Thanks for the problem report. We can reproduce it and will have a patch to fix it in GIT master branch @ https://github.com/ImageMagick/ImageMagick later today. The patch will be available in the beta releases of ImageMagick @ https://www.imagemagick.org/download/beta/ by sometime tomorrow.

@nohmask
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nohmask commented Mar 28, 2018

This was assigned CVE-2017-18252.

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