gnu: graphicsmagick: Fix CVE-2017-14165.

* gnu/packages/imagemagick.scm (graphicsmagick)[source]: Add patch.
* gnu/packages/patches/graphicsmagick-CVE-2017-14165.patch: New file.
* gnu/local.mk (dist_patch_DATA): Register it.

1 files changed, 72 insertions, 0 deletions

diff --git a/gnu/packages/patches/graphicsmagick-CVE-2017-14165.patch b/gnu/packages/patches/graphicsmagick-CVE-2017-14165.patch
new file mode 100644
index 0000000000..1f55d90d38
--- /dev/null
+++ b/gnu/packages/patches/graphicsmagick-CVE-2017-14165.patch
@@ -0,0 +1,72 @@
+http://hg.code.sf.net/p/graphicsmagick/code/raw-rev/493da54370aa
+http://openwall.com/lists/oss-security/2017/09/06/4
+
+some changes were made to make the patch apply
+
+# HG changeset patch
+# User Bob Friesenhahn <bfriesen@GraphicsMagick.org>
+# Date 1503257388 18000
+# Node ID 493da54370aa42cb430c52a69eb75db0001a5589
+# Parent  f8724674907902b7bc37c04f252fe30fbdd88e6f
+SUN: Verify that file header data length, and file length are sufficient for claimed image dimensions.
+
+diff -r f87246749079 -r 493da54370aa coders/sun.c
+--- a/coders/sun.c	Sun Aug 20 12:21:03 2017 +0200
++++ b/coders/sun.c	Sun Aug 20 14:29:48 2017 -0500
+@@ -498,6 +498,12 @@
+     if (sun_info.depth < 8)
+       image->depth=sun_info.depth;
+ 
++    if (image_info->ping)
++      {
++        CloseBlob(image);
++        return(image);
++      }
++
+     /*
+       Compute bytes per line and bytes per image for an unencoded
+       image.
+@@ -522,15 +528,37 @@
+       if (bytes_per_image > sun_info.length)
+         ThrowReaderException(CorruptImageError,ImproperImageHeader,image);
+ 
+-    if (image_info->ping)
+-      {
+-        CloseBlob(image);
+-        return(image);
+-      }
+     if (sun_info.type == RT_ENCODED)
+       sun_data_length=(size_t) sun_info.length;
+     else
+       sun_data_length=bytes_per_image;
++
++    /*
++      Verify that data length claimed by header is supported by file size
++    */
++    if (sun_info.type == RT_ENCODED)
++      {
++        if (sun_data_length < bytes_per_image/255U)
++          {
++            ThrowReaderException(CorruptImageError,ImproperImageHeader,image);
++          }
++      }
++    if (BlobIsSeekable(image))
++      {
++        const magick_off_t file_size = GetBlobSize(image);
++        const magick_off_t current_offset = TellBlob(image);
++        if ((file_size > 0) &&
++            (current_offset > 0) &&
++            (file_size > current_offset))
++        {
++          const magick_off_t remaining = file_size-current_offset;
++          if (remaining < (magick_off_t) sun_data_length)
++            {
++              ThrowReaderException(CorruptImageError,UnexpectedEndOfFile,image);
++            }
++        }
++      }
++
+     sun_data=MagickAllocateMemory(unsigned char *,sun_data_length);
+     if (sun_data == (unsigned char *) NULL)
+       ThrowReaderException(ResourceLimitError,MemoryAllocationFailed,image);
+