ImageMagick security policy error (solved)

[Member andfree]

$ convert *.jpg picture.pdf
convert-im6.q16: attempt to perform an operation not allowed by the security policy PDF @ error/constitute.c/IsCoderAuthorized/421.

/etc/ImageMagick-6/policy.xml:

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE policymap [
  <!ELEMENT policymap (policy)*>
  <!ATTLIST policymap xmlns CDATA #FIXED ''>
  <!ELEMENT policy EMPTY>
  <!ATTLIST policy xmlns CDATA #FIXED '' domain NMTOKEN #REQUIRED
    name NMTOKEN #IMPLIED pattern CDATA #IMPLIED rights NMTOKEN #IMPLIED
    stealth NMTOKEN #IMPLIED value CDATA #IMPLIED>
]>
<!--
  Configure ImageMagick policies.

  Domains include system, delegate, coder, filter, path, or resource.

  Rights include none, read, write, execute and all.  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" />

  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/*" />

  Lets prevent users from executing any image filters:

    <policy domain="filter" rights="none" pattern="*" />

  Any large image is cached to disk rather than memory:

    <policy domain="resource" name="area" value="1GP"/>

  Use the default system font unless overwridden by the application:

    <policy domain="system" name="font" value="/usr/share/fonts/favorite.ttf"/>

  Define arguments for the memory, map, area, width, height 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).

  Rules are processed in order.  Here we want to restrict ImageMagick to only
  read or write a small subset of proven web-safe image types:

    <policy domain="delegate" rights="none" pattern="*" />
    <policy domain="filter" rights="none" pattern="*" />
    <policy domain="coder" rights="none" pattern="*" />
    <policy domain="coder" rights="read|write" pattern="{GIF,JPEG,PNG,WEBP}" />
-->
<policymap>
  <!-- <policy domain="resource" name="temporary-path" value="/tmp"/> -->
  <policy domain="resource" name="memory" value="256MiB"/>
  <policy domain="resource" name="map" value="512MiB"/>
  <policy domain="resource" name="width" value="16KP"/>
  <policy domain="resource" name="height" value="16KP"/>
  <!-- <policy domain="resource" name="list-length" value="128"/> -->
  <policy domain="resource" name="area" value="128MP"/>
  <policy domain="resource" name="disk" value="1GiB"/>
  <!-- <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="coder" rights="none" pattern="MVG" /> -->
  <!-- <policy domain="module" rights="none" pattern="{PS,PDF,XPS}" /> -->
  <!-- <policy domain="path" rights="none" pattern="@*" /> -->
  <!-- <policy domain="cache" name="memory-map" value="anonymous"/> -->
  <!-- <policy domain="cache" name="synchronize" value="True"/> -->
  <!-- <policy domain="cache" name="shared-secret" value="passphrase" stealth="true"/>
  <!-- <policy domain="system" name="max-memory-request" value="256MiB"/> -->
  <!-- <policy domain="system" name="shred" value="2"/> -->
  <!-- <policy domain="system" name="precision" value="6"/> -->
  <!-- <policy domain="system" name="font" value="/path/to/font.ttf"/> -->
  <!-- <policy domain="system" name="pixel-cache-memory" value="anonymous"/> -->
  <!-- <policy domain="system" name="shred" value="2"/> -->
  <!-- <policy domain="system" name="precision" value="6"/> -->
  <!-- not needed due to the need to use explicitly by mvg: -->
  <!-- <policy domain="delegate" rights="none" pattern="MVG" /> -->
  <!-- use curl -->
  <policy domain="delegate" rights="none" pattern="URL" />
  <policy domain="delegate" rights="none" pattern="HTTPS" />
  <policy domain="delegate" rights="none" pattern="HTTP" />
  <!-- in order to avoid to get image with password text -->
  <policy domain="path" rights="none" pattern="@*"/>
  <!-- disable ghostscript format types -->
  <policy domain="coder" rights="none" pattern="PS" />
  <policy domain="coder" rights="none" pattern="PS2" />
  <policy domain="coder" rights="none" pattern="PS3" />
  <policy domain="coder" rights="none" pattern="EPS" />
  <policy domain="coder" rights="none" pattern="PDF" />
  <policy domain="coder" rights="none" pattern="XPS" />
</policymap>

• This topic was modified 1 month, 1 week ago by andfree.
• This topic was modified 1 month, 1 week ago by andfree.
• This topic was modified 1 month, 1 week ago by andfree.

[Member Robin]

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Up

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::

From: https://stackoverflow.com/a/59193253/15250400

1.) Make sure you have Ghostscript ≥9.24:

    gs --version

2.) If yes, just remove this whole following section from /etc/ImageMagick-6/policy.xml:

    <!-- disable ghostscript format types -->
    <policy domain="coder" rights="none" pattern="PS" />
    <policy domain="coder" rights="none" pattern="PS2" />
    <policy domain="coder" rights="none" pattern="PS3" />
    <policy domain="coder" rights="none" pattern="EPS" />
    <policy domain="coder" rights="none" pattern="PDF" />
    <policy domain="coder" rights="none" pattern="XPS" />

Windows is like a submarine. Open a window and serious problems will start.

[Member andfree]

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Thank you.

$ gs –version
bash: gs: command not found

$ sudo apt-get install ghostscript
Reading package lists... Done
Building dependency tree... Done
Reading state information... Done
Suggested packages:
  ghostscript-x
The following NEW packages will be installed:
  ghostscript
0 upgraded, 1 newly installed, 0 to remove and 1 not upgraded.
Need to get 0 B/98.1 kB of archives.
After this operation, 236 kB of additional disk space will be used.
Selecting previously unselected package ghostscript.
(Reading database ... 105079 files and directories currently installed.)
Preparing to unpack .../ghostscript_9.53.3~dfsg-7+deb11u2_i386.deb ...
Unpacking ghostscript (9.53.3~dfsg-7+deb11u2) ...
Setting up ghostscript (9.53.3~dfsg-7+deb11u2) ...
Processing triggers for man-db (2.10.1-1~bpo11+1) ...

$ gs –version
GPL Ghostscript 9.53.3 (2020-10-01)
Copyright (C) 2020 Artifex Software, Inc.  All rights reserved.
This software is supplied under the GNU AGPLv3 and comes with NO WARRANTY:
see the file COPYING for details.
Error: /undefinedfilename in (\342\200\223version)
Operand stack:

Execution stack:
   %interp_exit   .runexec2   --nostringval--   --nostringval--   --nostringval--   2   %stopped_push   --nostringval--   --nostringval--   --nostringval--   false   1   %stopped_push
Dictionary stack:
   --dict:726/1123(ro)(G)--   --dict:0/20(G)--   --dict:75/200(L)--
Current allocation mode is local
Last OS error: No such file or directory
GPL Ghostscript 9.53.3: Unrecoverable error, exit code 1

Robin wrote:

(…) remove this whole following section from /etc/ImageMagick-6/policy.xml:

<!– disable ghostscript format types –>
<policy domain=”coder” rights=”none” pattern=”PS” />
<policy domain=”coder” rights=”none” pattern=”PS2″ />
<policy domain=”coder” rights=”none” pattern=”PS3″ />
<policy domain=”coder” rights=”none” pattern=”EPS” />
<policy domain=”coder” rights=”none” pattern=”PDF” />
<policy domain=”coder” rights=”none” pattern=”XPS” />

Unfortunately, it didn’t work`

Finally, it seems that it worked. Many thanks.

• This reply was modified 1 month, 1 week ago by andfree.
• This reply was modified 1 month, 1 week ago by andfree.
• This reply was modified 1 month, 1 week ago by andfree.

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