Patch IM for security hole

Dockerfile

@@ -37,15 +37,15 @@ RUN build_deps="git build-base autoconf automake libtool" \
 	&& apk del $build_deps \
 	&& rm -rf /var/cache/apk/* /tmp/libpng
 
-RUN build_deps="build-base libtool freetype-dev xz-dev bzip2-dev tiff-dev libjpeg-turbo-dev ghostscript ghostscript-dev" \
-	&& mkdir /tmp/imagemagick \
-	&& cd /tmp/imagemagick \
-	&& wget -O ImageMagick.tar.gz "http://www.imagemagick.org/download/ImageMagick.tar.gz" \
-	&& IMDIR=$(tar -tzf ImageMagick.tar.gz |head -n 1 | cut -d / -f 1) \
-	&& tar -xzf ImageMagick.tar.gz \
-	&& cd $IMDIR \
+ENV IMAGEMAGICK_VERSION 6.9.3-10
+RUN build_deps="build-base libtool freetype-dev xz xz-dev bzip2-dev tiff-dev libjpeg-turbo-dev ghostscript ghostscript-dev" \
 	&& apk update \
 	&& apk add $build_deps \
+	&& mkdir /tmp/imagemagick \
+	&& cd /tmp/imagemagick \
+	&& wget -O ImageMagick.tar.xz "http://www.imagemagick.org/download/releases/ImageMagick-${IMAGEMAGICK_VERSION}.tar.xz" \
+	&& xz -cd ImageMagick.tar.xz | tar -xf - \
+	&& cd ImageMagick-${IMAGEMAGICK_VERSION} \
 	&& LDFLAGS=-L$PREFIX/lib CFLAGS=-I$PREFIX/include ./configure \
 	   --prefix=$PREFIX \
 	   --enable-static \
@@ -73,6 +73,8 @@ RUN build_deps="build-base libtool freetype-dev xz-dev bzip2-dev tiff-dev libjpe
 	&& apk add freetype xz-libs libbz2 libgcc libgomp libltdl tiff libjpeg-turbo ghostscript-fonts \
 	&& rm -rf /var/cache/apk/* /tmp/imagemagick
 
+ADD policy.xml /usr/local/etc/ImageMagick-6/
+
 RUN apk update \
 	&& apk add git sudo build-base \
 	&& adduser -s /bin/bash -u 9001 -D web \

policy.xml

@@ -0,0 +1,63 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE policymap [
+<!ELEMENT policymap (policy)+>
+<!ELEMENT policy (#PCDATA)>
+<!ATTLIST policy domain (delegate|coder|filter|path|resource) #IMPLIED>
+<!ATTLIST policy name CDATA #IMPLIED>
+<!ATTLIST policy rights CDATA #IMPLIED>
+<!ATTLIST policy pattern CDATA #IMPLIED>
+<!ATTLIST policy value CDATA #IMPLIED>
+]>
+<!--
+  Configure ImageMagick policies.
+
+  Domains include system, delegate, coder, filter, path, or resource.
+
+  Rights include none, read, write, and execute.  Use | to combine them,
+  for example: "read | write" to permit read from, or write to, a path.
+
+  Use a glob expression as a pattern.
+
+  Suppose we do not want users to process MPEG video images:
+
+    <policy domain="delegate" rights="none" pattern="mpeg:decode" />
+
+  Here we do not want users reading images from HTTP:
+
+    <policy domain="coder" rights="none" pattern="HTTP" />
+
+  Lets prevent users from executing any image filters:
+
+    <policy domain="filter" rights="none" pattern="*" />
+
+  The /repository file system is restricted to read only.  We use a glob
+  expression to match all paths that start with /repository:
+
+    <policy domain="path" rights="read" pattern="/repository/*" />
+
+  Any large image is cached to disk rather than memory:
+
+    <policy domain="resource" name="area" value="1GB"/>
+
+  Define arguments for the memory, map, area, and disk resources with
+  SI prefixes (.e.g 100MB).  In addition, resource policies are maximums for
+  each instance of ImageMagick (e.g. policy memory limit 1GB, -limit 2GB
+  exceeds policy maximum so memory limit is 1GB).
+-->
+<policymap>
+  <!-- <policy domain="resource" name="temporary-path" value="/tmp"/> -->
+  <!-- <policy domain="resource" name="memory" value="1GiB"/> -->
+  <!-- <policy domain="resource" name="map" value="2GiB"/> -->
+  <!-- <policy domain="resource" name="area" value="1GB"/> -->
+  <!-- <policy domain="resource" name="disk" value="16EB"/> -->
+  <!-- <policy domain="resource" name="file" value="768"/> -->
+  <!-- <policy domain="resource" name="thread" value="4"/> -->
+  <!-- <policy domain="resource" name="throttle" value="0"/> -->
+  <!-- <policy domain="resource" name="time" value="3600"/> -->
+  <!-- <policy domain="system" name="precision" value="6"/> -->
+  <policy domain="cache" name="shared-secret" value="passphrase"/>
+  <policy domain="coder" rights="none" pattern="EPHEMERAL" />
+  <policy domain="coder" rights="none" pattern="HTTPS" />
+  <policy domain="coder" rights="none" pattern="MVG" />
+  <policy domain="coder" rights="none" pattern="MSL" />
+</policymap>