ghsa-gx4f-976g-7g6v
Vulnerability from github
Published
2023-03-08 17:19
Modified
2023-03-08 17:19
Severity ?
7.7 (High) - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N
Summary
XWiki Platform vulnerable to data leak via Improper Restriction of XML External Entity Reference
Details

Impact

Any user with edit rights on a document can trigger a XAR import on a forged XAR file, leading to the ability to display the content of any file on the XWiki server host.

Example to reproduce: * Create a forget XAR file and inside it, have the following package.xml content: ```xml

]>

&xxe; &xxe; Helper pages for creating and listing Class/Template/Sheets XWiki.Admin ... `` * Upload it onto a wiki page (e.g.XXE) as an attachment (e.g.test.xar). * Call the page usinghttp://localhost:8080/xwiki/bin/view/Main/XXE?sheet=XWiki.AdminImportSheet&file=test.xar`

You'll then notice that the displayed UI contains the content of the /etc/passwd file.

Patches

The vulnerability has been patched in XWiki 13.10.11, 14.4.7 and 14.10-rc-1.

Workarounds

You'd need to get XWiki Platform sources and apply the changes from https://github.com/xwiki/xwiki-platform/commit/e3527b98fdd8dc8179c24dc55e662b2c55199434 to the XarPackage java class and then copy the modified version to your WEB-INF/classes directory (or rebuild the xwiki-platform-xar-model maven module and replace the one found in WEB-INF/lib/).

References

  • https://github.com/xwiki/xwiki-platform/commit/e3527b98fdd8dc8179c24dc55e662b2c55199434
  • https://jira.xwiki.org/browse/XWIKI-20320

For more information

If you have any questions or comments about this advisory: * Open an issue in Jira XWiki.org * Email us at Security Mailing List

Show details on source website

To clipboard 

{
   affected: [
      {
         package: {
            ecosystem: "Maven",
            name: "org.xwiki.platform:xwiki-platform-xar-model",
         },
         ranges: [
            {
               events: [
                  {
                     introduced: "1.1-milestone-3",
                  },
                  {
                     fixed: "13.10.11",
                  },
               ],
               type: "ECOSYSTEM",
            },
         ],
      },
      {
         package: {
            ecosystem: "Maven",
            name: "org.xwiki.platform:xwiki-platform-xar-model",
         },
         ranges: [
            {
               events: [
                  {
                     introduced: "14.0",
                  },
                  {
                     fixed: "14.4.7",
                  },
               ],
               type: "ECOSYSTEM",
            },
         ],
      },
      {
         package: {
            ecosystem: "Maven",
            name: "org.xwiki.platform:xwiki-platform-xar-model",
         },
         ranges: [
            {
               events: [
                  {
                     introduced: "14.5",
                  },
                  {
                     fixed: "14.10-rc-1",
                  },
               ],
               type: "ECOSYSTEM",
            },
         ],
      },
   ],
   aliases: [
      "CVE-2023-27480",
   ],
   database_specific: {
      cwe_ids: [
         "CWE-611",
      ],
      github_reviewed: true,
      github_reviewed_at: "2023-03-08T17:19:30Z",
      nvd_published_at: "2023-03-07T19:15:00Z",
      severity: "HIGH",
   },
   details: "### Impact\nAny user with edit rights on a document can trigger a XAR import on a forged XAR file, leading to the ability to display the content of any file on the XWiki server host.\n\nExample to reproduce:\n* Create a forget XAR file and inside it, have the following `package.xml` content:\n  ```xml\n  <?xml version=\"1.0\" encoding=\"UTF-8\"?>\n  <!DOCTYPE foo [ <!ENTITY xxe SYSTEM \"file:///etc/passwd\"> ]>\n\n  <package>\n  <infos>\n  <name>&xxe;</name>\n  <description> &xxe; Helper pages for creating and listing Class/Template/Sheets</description>\n  <licence></licence>\n  <author>XWiki.Admin</author>\n  ...\n  ```\n* Upload it onto a wiki page (e.g. `XXE`) as an attachment (e.g. `test.xar`).\n* Call the page using `http://localhost:8080/xwiki/bin/view/Main/XXE?sheet=XWiki.AdminImportSheet&file=test.xar`\n\nYou'll then notice that the displayed UI contains the content of the `/etc/passwd` file.\n\n### Patches\nThe vulnerability has been patched in XWiki 13.10.11, 14.4.7 and 14.10-rc-1.\n\n### Workarounds\nYou'd need to get XWiki Platform sources and apply the changes from https://github.com/xwiki/xwiki-platform/commit/e3527b98fdd8dc8179c24dc55e662b2c55199434 to the `XarPackage` java class and then copy the modified version to your `WEB-INF/classes` directory (or rebuild the `xwiki-platform-xar-model` maven module and replace the one found in `WEB-INF/lib/`).\n\n### References\n* https://github.com/xwiki/xwiki-platform/commit/e3527b98fdd8dc8179c24dc55e662b2c55199434\n* https://jira.xwiki.org/browse/XWIKI-20320\n\n### For more information\nIf you have any questions or comments about this advisory:\n*    Open an issue in [Jira XWiki.org](https://jira.xwiki.org/)\n*    Email us at [Security Mailing List](mailto:security@xwiki.org)\n",
   id: "GHSA-gx4f-976g-7g6v",
   modified: "2023-03-08T17:19:30Z",
   published: "2023-03-08T17:19:30Z",
   references: [
      {
         type: "WEB",
         url: "https://github.com/xwiki/xwiki-platform/security/advisories/GHSA-gx4f-976g-7g6v",
      },
      {
         type: "ADVISORY",
         url: "https://nvd.nist.gov/vuln/detail/CVE-2023-27480",
      },
      {
         type: "WEB",
         url: "https://github.com/xwiki/xwiki-platform/commit/e3527b98fdd8dc8179c24dc55e662b2c55199434",
      },
      {
         type: "PACKAGE",
         url: "https://github.com/xwiki/xwiki-platform",
      },
      {
         type: "WEB",
         url: "https://jira.xwiki.org/browse/XWIKI-20320",
      },
   ],
   schema_version: "1.4.0",
   severity: [
      {
         score: "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N",
         type: "CVSS_V3",
      },
   ],
   summary: "XWiki Platform vulnerable to data leak via Improper Restriction of XML External Entity Reference",
}


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