CVE-2023-46731 (published 2023-11-06T19:15Z)

XWiki Platform is a generic wiki platform offering runtime services for applications built on top of it. XWiki doesn't properly escape the section URL parameter that is used in the code for displaying administration sections. This allows any user with read access to the document `XWiki.AdminSheet` (by default, everyone including unauthenticated users) to execute code including Groovy code. This impacts the confidentiality, integrity and availability of the whole XWiki instance. This vulnerability has been patched in XWiki 14.10.14, 15.6 RC1 and 15.5.1. Users are advised to upgrade. Users unablr to upgrade may apply the fix in commit `fec8e0e53f9` manually. Alternatively, to protect against attacks from unauthenticated users, view right for guests can be removed from this document (it is only needed for space and wiki admins).

CVSS v3 base score: 9.8, CRITICAL (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H)

Weakness information:
cwe_id: CWE-94
cwe_name: Improper Control of Generation of Code ('Code Injection')
description: The product constructs all or part of a code segment using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the syntax or behavior of the intended code segment.
extended_description: 
            When a product allows a user's input to contain code syntax, it might be possible for an attacker to craft the code in such a way that it will alter the intended control flow of the product. Such an alteration could lead to arbitrary code execution.
            Injection problems encompass a wide variety of issues -- all mitigated in very different ways. For this reason, the most effective way to discuss these weaknesses is to note the distinct features which classify them as injection weaknesses. The most important issue to note is that all injection problems share one thing in common -- i.e., they allow for the injection of control plane data into the user-controlled data plane. This means that the execution of the process may be altered by sending code in through legitimate data channels, using no other mechanism. While buffer overflows, and many other flaws, involve the use of some further issue to gain execution, injection problems need only for the data to be parsed. The most classic instantiations of this category of weakness are SQL injection and format string vulnerabilities.
         
         

Fix information:
repo_url: https://github.com/xwiki/xwiki-platform
commit_details: repo_url: https://github.com/xwiki/xwiki-platform
author: Michael Hamann
author_date: 2023-07-11 16:47:08+02:00
msg: XWIKI-21110: Improve section name display in administration
repository: repo_url: https://github.com/xwiki/xwiki-platform
repo_name: xwiki/xwiki-platform
description: The XWiki platform
repo_language: Java
owner: xwiki
file_changes: filename: AdminSheet.xml
change_type: ModificationType.MODIFY
diff: @@ -371,7 +371,7 @@
   #end
 #end
 (% id="document-title" %)(((
-  = $services.localization.render("administration.sectionTitle$level", [$sectionName]) =
+  = $services.localization.render("administration.sectionTitle$level", 'xwiki/2.1', [$sectionName]) =
   ## Display the category/section description below the title.
   #set ($categoryOrSectionId = $crtCategory.id)
   #if ("$!crtSection.id" != '')

programming_language: Ruby
filename: AdminSheetPageTest.java
change_type: ModificationType.ADD
diff: @@ -0,0 +1,60 @@
+/*
+ * See the NOTICE file distributed with this work for additional
+ * information regarding copyright ownership.
+ *
+ * This is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU Lesser General Public License as
+ * published by the Free Software Foundation; either version 2.1 of
+ * the License, or (at your option) any later version.
+ *
+ * This software is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this software; if not, write to the Free
+ * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
+ * 02110-1301 USA, or see the FSF site: http://www.fsf.org.
+ */
+package org.xwiki.administration;
+
+import org.jsoup.nodes.Document;
+import org.jsoup.nodes.Element;
+import org.junit.jupiter.api.Test;
+import org.xwiki.model.reference.DocumentReference;
+import org.xwiki.test.annotation.ComponentList;
+import org.xwiki.test.page.HTML50ComponentList;
+import org.xwiki.test.page.PageTest;
+import org.xwiki.test.page.TestNoScriptMacro;
+import org.xwiki.test.page.XWikiSyntax21ComponentList;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertNotNull;
+
+/**
+ * Page test of {@code XWiki.AdminSheet}.
+ *
+ * @version $Id$
+ */
+@HTML50ComponentList
+@XWikiSyntax21ComponentList
+@ComponentList({
+    TestNoScriptMacro.class
+})
+class AdminSheetPageTest extends PageTest
+{
+    private static final DocumentReference ADMIN_SHEET = new DocumentReference("xwiki", "XWiki", "AdminSheet");
+
+    @Test
+    void sectionEscaping() throws Exception
+    {
+        this.request.put("section", "{{noscript /}}");
+        this.request.put("viewer", "content");
+
+        Document result = renderHTMLPage(ADMIN_SHEET);
+        Element documentTitle = result.getElementById("document-title");
+        assertNotNull(documentTitle);
+        assertEquals("administration.sectionTitle [{{noscript /}}]", documentTitle.text());
+    }
+}

programming_language: Java