Index: src/java/org/apache/ivy/plugins/resolver/packager/PackagerResolver.java
===================================================================
--- src/java/org/apache/ivy/plugins/resolver/packager/PackagerResolver.java	(revision 731981)
+++ src/java/org/apache/ivy/plugins/resolver/packager/PackagerResolver.java	(working copy)
@@ -57,6 +57,7 @@
     
     private boolean validate = true;
     private boolean preserve;
+    private boolean restricted = true;
     private boolean verbose;
     private boolean quiet;
     
@@ -134,6 +135,13 @@
     }
 
     /**
+     * Set whether to enable restricted mode. Default is true.
+     */
+    public void setRestricted(boolean restricted) {
+        this.restricted = restricted;
+    }
+
+    /**
      * Set whether to run ant with the -verbose flag. Default is false.
      */
     public void setVerbose(boolean verbose) {
@@ -216,7 +224,8 @@
                 return null;
             }
             entry = new PackagerCacheEntry(mr, this.buildRoot, this.resourceCache,
-              this.resourceURL, this.validate, this.preserve, this.verbose, this.quiet);
+              this.resourceURL, this.validate, this.preserve, this.restricted,
+              this.verbose, this.quiet);
             try {
                 entry.build(packager.getResource(), properties);
             } catch (IOException e) {
Index: src/java/org/apache/ivy/plugins/resolver/packager/packager.xsl
===================================================================
--- src/java/org/apache/ivy/plugins/resolver/packager/packager.xsl	(revision 731981)
+++ src/java/org/apache/ivy/plugins/resolver/packager/packager.xsl	(working copy)
@@ -20,6 +20,7 @@
     <xsl:output encoding="UTF-8" method="xml" indent="yes" media-type="text/xml"/>
 
     <xsl:param name="resourceURL"/>
+    <xsl:param name="restricted"/>
 
     <xsl:variable name="maven2repo" select="'http://repo1.maven.org/maven2/'"/>
 
@@ -59,7 +60,7 @@
         <xsl:copy-of select="."/>
     </xsl:template>
 
-    <!-- The allowed build actions -->
+    <!-- The allowed build actions in restricted mode -->
     <xsl:template match="/packager-module/build/copy"><xsl:copy-of select="."/></xsl:template>
     <xsl:template match="/packager-module/build/jar"><xsl:copy-of select="."/></xsl:template>
     <xsl:template match="/packager-module/build/mkdir"><xsl:copy-of select="."/></xsl:template>
@@ -72,6 +73,18 @@
     <xsl:template match="/packager-module/build/war"><xsl:copy-of select="."/></xsl:template>
     <xsl:template match="/packager-module/build/zip"><xsl:copy-of select="."/></xsl:template>
 
+    <!-- Allow other build actions when restricted="false", otherwise generate error -->
+    <xsl:template match="/packager-module/build/*">
+        <xsl:choose>
+            <xsl:when test="$restricted = 'false'">
+                <xsl:copy-of select="."/>
+            </xsl:when>
+            <xsl:otherwise>
+                <xsl:message terminate="yes">build tag &lt;<xsl:value-of select="name()"/>&gt; not allowed in restricted mode</xsl:message>
+            </xsl:otherwise>
+        </xsl:choose>
+    </xsl:template>
+
     <!-- Resource definitions -->
     <xsl:template match="/packager-module/resource">
 
Index: src/java/org/apache/ivy/plugins/resolver/packager/PackagerCacheEntry.java
===================================================================
--- src/java/org/apache/ivy/plugins/resolver/packager/PackagerCacheEntry.java	(revision 731981)
+++ src/java/org/apache/ivy/plugins/resolver/packager/PackagerCacheEntry.java	(working copy)
@@ -48,6 +48,7 @@
     private final String resourceURL;
     private final boolean validate;
     private final boolean preserve;
+    private final boolean restricted;
     private final boolean verbose;
     private final boolean quiet;
 
@@ -56,13 +57,14 @@
     // CheckStyle:ParameterNumber OFF
     public PackagerCacheEntry(ModuleRevisionId mr, File rootDir,
       File resourceCache, String resourceURL, boolean validate,
-      boolean preserve, boolean verbose, boolean quiet) {
+      boolean preserve, boolean restricted, boolean verbose, boolean quiet) {
         this.mr = mr;
         this.dir = getSubdir(rootDir, this.mr);
         this.resourceCache = resourceCache;
         this.resourceURL = resourceURL;
         this.validate = validate;
         this.preserve = preserve;
+        this.restricted = restricted;
         this.verbose = verbose;
         this.quiet = quiet;
     }
@@ -143,6 +145,7 @@
         if (this.validate) {
             project.setUserProperty("ivy.packager.validate", "true");
         }
+        project.setUserProperty("ivy.packager.restricted", "" + this.restricted);
         if (properties != null) {
             for (Iterator it = properties.entrySet().iterator(); it.hasNext();) {
                 Entry entry = (Entry) it.next();
Index: src/java/org/apache/ivy/plugins/resolver/packager/build.xml
===================================================================
--- src/java/org/apache/ivy/plugins/resolver/packager/build.xml	(revision 731981)
+++ src/java/org/apache/ivy/plugins/resolver/packager/build.xml	(working copy)
@@ -44,6 +44,7 @@
     <target name="style">
         <xslt style="packager.xsl" in="packager.xml" out="packager-output.xml">
             <param name="resourceURL" expression="${resourceURL}"/>
+            <param name="restricted" expression="${ivy.packager.restricted}"/>
         </xslt>
     </target>
 
Index: doc/resolver/packager.html
===================================================================
--- doc/resolver/packager.html	(revision 731981)
+++ doc/resolver/packager.html	(working copy)
@@ -40,10 +40,6 @@
 </p>
 
 <p>
-The only packaging operations currently supported are downloading files, extracting files from archives, packaging files into archives, and moving and copying files. In the future more general operations may be supported, once appropriate security controls are in place.
-</p>
-
-<p>
 Packager repositories allow the creation of Ivy repositories that require neither the participation of any of the modules' creators nor setting up a huge mirror site. One such repository on the web is <a href="http://ivyroundup.googlecode.com/">Ivy RoundUp</a>. Of course, private packager repositories are feasible as well.
 </p>
 
@@ -52,11 +48,11 @@
 </p>
 
 <p>
-The packaging instructions are contained in "packager.xml" in a simple XML format. At resolve time this file gets converted into a "build.xml" file via XSLT and then executed using <a href="http://ant.apache.org/">ant</a>. Therefore, ant must be available as an executable on the platform. The ant task executes in a separate process and so is not affected by properties, etc. that may be set in any existing ant environment in which Ivy is running. However, Ivy will define a few properties for convenience; see the "Properties" listed below.
+The packaging instructions are contained in "packager.xml" in a simple XML format. At resolve time this file gets converted into a "build.xml" file via XSLT and then executed using <a href="http://ant.apache.org/">ant</a>. Therefore, ant must be available as an executable on the platform. The ant task executes in a separate ant project and so is not affected by properties, etc. that may be set in any existing ant environment in which Ivy is running. However, Ivy will define a few properties for convenience; see the "Properties" listed below.
 </p>
 
 <p>
-For security reasons, the XSLT transform ensures that (a) all downloaded archives have verified SHA1 checksums (including cached resources); and (b) only a very limited set of ant tasks can be performed during the artifact "build" phase; currently these include move, copy, mkdir, zip, unzip, tar, and untar.
+For security reasons, the XSLT transform ensures that (a) all downloaded archives have verified SHA1 checksums (including cached resources); and (b) only a very limited set of ant tasks can be performed during the artifact "build" phase; currently these include move, copy, mkdir, zip, unzip, tar, and untar (this restriction may be overridden however; see below).
 </p>
 
 <p>
@@ -64,11 +60,11 @@
 </p>
 
 <p>
-Because the downloading and packaging process is relatively slow, it is important to use <a href="../concept.html#cache">Ivy's caching support</a> to avoid repeated execution of the packaging instructions.
+Because the packaging process is relatively slow, it is important to use <a href="../concept.html#cache">Ivy's caching support</a> to avoid repeated execution of the packaging instructions.
 </p>
 
 <h1>Attributes</h1>
-This resolver shares the <a href="../settings/resolvers.html#common">common attributes</a> of standard resolvers.
+This resolver shares the <a href="../settings/resolvers.html#common">common attributes</a> of standard resolvers, plus the following:
 <table class="ivy-attributes">
 <thead>
     <tr><th class="ivy-att">Attribute</th><th class="ivy-att-desc">Description</th><th class="ivy-att-req">Required</th></tr>
@@ -90,6 +86,11 @@
     <td>No; defaults to none</td>
   </tr>
   <tr>
+    <td>restricted</td>
+    <td>True if this resolver should only allow "safe" ant tasks in the packaging instructions</td>
+    <td>No; defaults to true</td>
+  </tr>
+  <tr>
     <td>verbose</td>
     <td>True to run ant with the -verbose flag</td>
     <td>No; defaults to false</td>
@@ -255,12 +256,18 @@
   </tr>
   <tr>
     <td>build</td>
-    <td>Specify move, copy, and/or archiving ant tasks that ultimately result in each artifact being placed into artifacts/[type]s/[artifact].[ext]</td>
+    <td>Specify ant tasks that ultimately result in each artifact being placed into artifacts/[type]s/[artifact].[ext]</td>
     <td>0..1</td>
   </tr>
 </tbody>
 </table>
+<br />
+Which ant tasks are allowed within the build tag is controlled by the <span class="ivy-att">restricted</span> configuration attribute. When true (the default), only the following ant tasks are allowed: copy, jar, mkdir, move, tar, unjar, untar, unwar, unzip, war, and zip. When false, all ant tasks are allowed.
 
+<p>
+<strong>Warning:</strong> setting <span class="ivy-att">restricted</span> to false creates a security problem due to ant tasks like delete, exec, etc. Do not use this setting when your configuration points to an untrusted repository.
+</p>
+
 <h1>Resource XML Elements</h1>
 The resource XML tag supports the following attributes:
 <table class="ivy-attributes">