guix/gnu/packages/patches/freeimage-CVE-2016-5684.patch

From: Debian Science Maintainers
 <debian-science-maintainers@lists.alioth.debian.org>
Date: Mon, 10 Oct 2016 08:22:44 +0100
Subject: CVE-2016-5684

---
 Source/FreeImage/PluginXPM.cpp | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/Source/FreeImage/PluginXPM.cpp b/Source/FreeImage/PluginXPM.cpp
index a698321..cc7bd07 100644
--- a/Source/FreeImage/PluginXPM.cpp
+++ b/Source/FreeImage/PluginXPM.cpp
@@ -181,6 +181,11 @@ Load(FreeImageIO *io, fi_handle handle, int page, int flags, void *data) {
 		}
 		free(str);
 
+		// check info string
+		if((width <= 0) || (height <= 0) || (colors <= 0) || (cpp <= 0)) {
+			throw "Improperly formed info string";
+		}
+
         if (colors > 256) {
 			dib = FreeImage_AllocateHeader(header_only, width, height, 24, FI_RGBA_RED_MASK, FI_RGBA_GREEN_MASK, FI_RGBA_BLUE_MASK);
 		} else {
@@ -193,7 +198,7 @@ Load(FreeImageIO *io, fi_handle handle, int page, int flags, void *data) {
 			FILE_RGBA rgba;
 
 			str = ReadString(io, handle);
-			if(!str)
+			if(!str || (strlen(str) < (size_t)cpp))
 				throw "Error reading color strings";
 
 			std::string chrs(str,cpp); //create a string for the color chars using the first cpp chars