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Date: Sat, 1 Oct 2016 10:43:18 -0500 (CDT)
From: Bob Friesenhahn <>
Subject: GraphicsMagick CVE request: 8BIM/8BIMW unsigned underflow leads to
 heap overflow

Today we received a report from Marco Grassi about a heap overflow in 
the 8BIM reader.  8BIM is a metadata chunk often attached to JPEG 

After investigation it was found that there was a small unsigned 
overflow leading to a huge size value, which then resulted in a heap 
overflow (causing a crash).

We believe that this issue exists in all GraphicsMagick releases to 
date (including 1.3.25).

The fix to this may be found in GraphicsMagick Mercurial at 

Bob Friesenhahn,
GraphicsMagick Maintainer,

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