Attacker Value

Moderate

(1 user assessed)

Exploitability

Very High

(1 user assessed)

User Interaction

None

Privileges Required

None

Attack Vector

Network

CVE-2021-22652

Disclosure Date: February 11, 2021 •

CVE-2021-22652 CVSS v3 Base Score: 9.8

MITRE ATT&CK

Add MITRE ATT&CK tactics and techniques that apply to this CVE.

Gives privileged access Unauthenticated Vulnerable in default configuration

Description

Access to the Advantech iView versions prior to v5.7.03.6112 configuration are missing authentication, which may allow an unauthorized attacker to change the configuration and obtain code execution.

Add Assessment

wvu-r7 (327)

February 11, 2021 11:19pm UTC (3 weeks ago)

Ratings

Attacker Value

Medium

Exploitability

Very High

Gives privileged access Unauthenticated Vulnerable in default configuration

Technical Analysis

The patch adds authentication to updateSystemSettings(), exportInventoryTable(), and a number of other methods.

   private boolean updateSystemSettings(HttpServletRequest request, HttpServletResponse response) {
     boolean bReturn = false;
     boolean bDataOk = false;
     StringBuffer strResults = new StringBuffer();
     String strPROMFilePath = new String();
     String strExportFilePath = new String();
     String strImportFilePath = new String();
     String strConfigFilePath = new String();
     String strDbBackupFilePath = new String();
     String strZTPTemplatesPath = new String();
     String strSSHPort = new String();
     String strTFTPPort = new String();
     String strMaxBackupFiles = new String();
     String strNetworkScanTimeout = new String();
     String strUserSessionTimeout = new String();
     String strJSONObj = request.getParameter("json_obj");
     String strJSONNamingObj = request.getParameter("json_naming_obj");
     SystemTable tempSystemTable = new SystemTable();
     int nUseCustomNaming = 0;
     JSONObject objJSON = null;
     DeviceTreeTable tempDeviceTreeTable = new DeviceTreeTable();
+    HttpSession session = request.getSession();
+    if (session == null || session.getAttribute("user_id") == null || session.getAttribute("user_name") == null || session.getAttribute("user_level") == null) {
+      strResults.append("Failed to update system settings: User Not Login");
+      System.out.println("Failed to update system settings: User Not Login");
+      response.setContentType("text/html");
+      try {
+        PrintWriter out = response.getWriter();
+        out.println(strResults);
+      } catch (Exception e) {
+        System.out.println("NetworkServlet-updateSystemSettings: " + e.toString());
+      }
+      return bReturn;
+    }
+    boolean bSecVuln = false;
     try {
       objJSON = new JSONObject(new JSONTokener(strJSONObj));
       strPROMFilePath = objJSON.getString("PROMPATH");
       strExportFilePath = objJSON.getString("EXPORTPATH");
       strImportFilePath = objJSON.getString("IMPORTPATH");
       strConfigFilePath = objJSON.getString("CONFIGPATH");
       strDbBackupFilePath = objJSON.getString("DBBACKUPPATH");
       strZTPTemplatesPath = objJSON.getString("ZTPTEMPLATESPATH");
       strSSHPort = objJSON.getString("SSHPORT");
       strTFTPPort = objJSON.getString("TFTPPORT");
       strMaxBackupFiles = objJSON.getString("MAXBACKUPFILES");
       strNetworkScanTimeout = objJSON.getString("NETWORKSCANTIMEOUT");
       strUserSessionTimeout = objJSON.getString("USERSESSIONTIMEOUT");
       nUseCustomNaming = objJSON.getInt("USECUSTOMNAMING");
       bDataOk = true;
-      boolean sqlInj = false;
+      boolean sqlInj1 = false, filepathDir1 = true;
+      boolean sqlInj2 = false, filepathDir2 = true;
+      boolean sqlInj3 = false, filepathDir3 = true;
+      boolean sqlInj4 = false, filepathDir4 = true;
+      boolean sqlInj5 = false, filepathDir5 = true;
+      boolean sqlInj6 = false, filepathDir6 = true;
       CUtils cutil = new CUtils();
-      if (strPROMFilePath != null && !strPROMFilePath.equals(""))
-        sqlInj = cutil.checkSQLInjection(strPROMFilePath);
-      if (sqlInj)
+      if (strPROMFilePath != null && !strPROMFilePath.equals("")) {
+        sqlInj1 = cutil.checkSQLInjection(strPROMFilePath);
+        filepathDir1 = cutil.checkDirectory(strPROMFilePath);
+      }
+      if (strExportFilePath != null && !strExportFilePath.equals("")) {
+        sqlInj2 = cutil.checkSQLInjection(strExportFilePath);
+        filepathDir2 = cutil.checkDirectory(strExportFilePath);
+      }
+      if (strImportFilePath != null && !strImportFilePath.equals("")) {
+        sqlInj3 = cutil.checkSQLInjection(strImportFilePath);
+        filepathDir3 = cutil.checkDirectory(strImportFilePath);
+      }
+      if (strConfigFilePath != null && !strConfigFilePath.equals("")) {
+        sqlInj4 = cutil.checkSQLInjection(strConfigFilePath);
+        filepathDir4 = cutil.checkDirectory(strConfigFilePath);
+      }
+      if (strDbBackupFilePath != null && !strDbBackupFilePath.equals("")) {
+        sqlInj5 = cutil.checkSQLInjection(strDbBackupFilePath);
+        filepathDir5 = cutil.checkDirectory(strDbBackupFilePath);
+      }
+      if (strZTPTemplatesPath != null && !strZTPTemplatesPath.equals("")) {
+        sqlInj6 = cutil.checkSQLInjection(strZTPTemplatesPath);
+        filepathDir6 = cutil.checkDirectory(strZTPTemplatesPath);
+      }
+      if (sqlInj1 || sqlInj2 || sqlInj3 || sqlInj4 || sqlInj5 || sqlInj6)
+        bDataOk = false;
+      if (!filepathDir1 || !filepathDir2 || !filepathDir3 || !filepathDir4 ||
+        !filepathDir5 || !filepathDir6) {
+        bSecVuln = true;
         bDataOk = false;
+      }
     } catch (Exception exception) {}
     if (bDataOk) {
       if (nUseCustomNaming == 1)
         bDataOk = tempDeviceTreeTable.saveNamingData(strJSONNamingObj);
       if (bDataOk) {
         if (tempSystemTable.updateSystemSettings(strJSONObj)) {
           strResults.append("[{\"PROMPATH\":\"");
           strResults.append(addBackslash(strPROMFilePath));
           strResults.append("\",\"EXPORTPATH\":\"");
           strResults.append(addBackslash(strExportFilePath));
           strResults.append("\",\"IMPORTPATH\":\"");
           strResults.append(addBackslash(strImportFilePath));
           strResults.append("\",\"CONFIGPATH\":\"");
           strResults.append(addBackslash(strConfigFilePath));
           strResults.append("\",\"DBBACKUPPATH\":\"");
           strResults.append(addBackslash(strDbBackupFilePath));
           strResults.append("\",\"ZTPTEMPLATESPATH\":\"");
           strResults.append(addBackslash(strZTPTemplatesPath));
           strResults.append("\",\"SSHPORT\":\"");
           strResults.append(addBackslash(strSSHPort));
           strResults.append("\",\"TFTPPORT\":\"");
           strResults.append(addBackslash(strTFTPPort));
           strResults.append("\",\"MAXBACKUPFILES\":\"");
           strResults.append(addBackslash(strMaxBackupFiles));
           strResults.append("\",\"NETWORKSCANTIMEOUT\":\"");
           strResults.append(addBackslash(strNetworkScanTimeout));
           strResults.append("\",\"USERSESSIONTIMEOUT\":\"");
           strResults.append(addBackslash(strUserSessionTimeout));
           strResults.append("\",\"USECUSTOMNAMING\":\"");
           strResults.append(Integer.toString(nUseCustomNaming));
           if (nUseCustomNaming == 1) {
             if (tempDeviceTreeTable.createCustomNaming()) {
               String strTempNaming = tempDeviceTreeTable.getCustomNaming();
               strResults.append("\",\"CUSTOMNAMETEMPLATE\":\"" + strTempNaming + "\"},");
             } else {
               strResults.append("\",\"CUSTOMNAMETEMPLATE\":\"\"},");
             }
             if (tempDeviceTreeTable.getNamingData()) {
               strResults.append(String.valueOf(tempDeviceTreeTable.getJSONObject()) + "]");
             } else {
               strResults.append("{\"IVIEW_NAMING\":\"\"}]");
             }
           } else {
             strResults.append("\",\"CUSTOMNAMETEMPLATE\":\"\"},{\"IVIEW_NAMING\":\"\"}]");
           }
         } else {
           strResults.append("Failed to save System Settings data.");
         }
       } else {
         strResults.append("Failed to save custom naming format data.");
       }
+    } else if (bSecVuln) {
+      strResults.append("Failed to updateSystemSettings: File Path Error.");
     } else {
       strResults.append("Failed to parse updateSystemSettings data.");
     }
     response.setContentType("text/html");
     try {
       PrintWriter out = response.getWriter();
       out.println(strResults.toString());
     } catch (Exception e) {
-      System.out.println("NetworkServlet-retrieveSystemSettings: " + e.toString());
+      System.out.println("NetworkServlet-updateSystemSettings: " + e.toString());
     }
     return bReturn;
   }

   private boolean exportInventoryTable(HttpServletRequest request, HttpServletResponse response) {
     boolean bReturn = false;
     String strResults = new String();
     String strColumnList = request.getParameter("col_list");
     String strSeperator = request.getParameter("sep_type");
     String strFilename = request.getParameter("filename");
     String strSearchTerm = request.getParameter("query");
     String strSearchCol = request.getParameter("qtype");
     String strSortCol = request.getParameter("sortname");
     String strSortOrder = request.getParameter("sortorder");
     DeviceTreeTable tempDeviceTreeTable = new DeviceTreeTable();
+    HttpSession session = request.getSession();
+    if (session == null || session.getAttribute("user_id") == null || session.getAttribute("user_name") == null || session.getAttribute("user_level") == null) {
+      strResults = "Failed to export inventory table: User Not Login";
+      System.out.println("Failed to export inventory table: User Not Login");
+      response.setContentType("text/html");
+      try {
+        PrintWriter out = response.getWriter();
+        out.println(strResults);
+      } catch (Exception e) {
+        System.out.println("NetworkServlet-exportInventoryTable: " + e.toString());
+      }
+      return bReturn;
+    }
     try {
       Thread.sleep(3000L);
     } catch (InterruptedException interruptedException) {}
-    boolean sqlInj1 = false, sqlInj2 = false, dtrl = false;
+    boolean sqlInj0 = false, sqlInj1 = false, sqlInj2 = false, dtrl = false;
     CUtils cutil = new CUtils();
+    if (strColumnList != null && !strColumnList.equals(""))
+      sqlInj0 = cutil.checkSQLInjection(strColumnList);
     if (strSearchTerm != null && !strSearchTerm.equals(""))
       sqlInj1 = cutil.checkSQLInjection(strSearchTerm);
     if (strSearchCol != null && !strSearchCol.equals(""))
       sqlInj2 = cutil.checkSQLInjection(strSearchCol);
     if (strFilename != null && !strFilename.equals(""))
-      dtrl = cutil.checkFileNameIncludePath(strFilename);
-    if (!sqlInj1 && !sqlInj2 && !dtrl) {
+      dtrl = cutil.checkFileNameIncludePath(strFilename, "csv");
+    if (!sqlInj0 && !sqlInj1 && !sqlInj2 && !dtrl) {
       if (tempDeviceTreeTable.exportInventoryTable(strColumnList, strSeperator, strFilename, strSearchTerm, strSearchCol, strSortCol, strSortOrder)) {
         strResults = "Export has completed.";
       } else {
         strResults = "Export failed.";
       }
     } else if (dtrl && !sqlInj1 && !sqlInj2) {
-      strResults = "Export failed: Directory Traversal Vulnerability";
+      strResults = "Export failed: Directory/Path Traversal Vulnerability";
     } else if (!dtrl && (sqlInj1 || sqlInj2)) {
       strResults = "Export failed: SQL Injection Vulnerability";
     } else {
       strResults = "Export failed: Security Vulnerability";
     }
     response.setContentType("text/html");
     try {
       PrintWriter out = response.getWriter();
       out.println(strResults);
     } catch (Exception e) {
       System.out.println("NetworkServlet.exportInventoryTable: " + e.toString());
     }
     return bReturn;
   }

CVSS V3 Severity and Metrics

Data provided by the National Vulnerability Database (NVD)

Base Score:

9.8 Critical

Impact Score:

5.9

Exploitability Score:

3.9

Vector:

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector (AV):

Network

Attack Complexity (AC):

Low

Privileges Required (PR):

None

User Interaction (UI):

None

Scope (S):

Unchanged

Confidentiality (C):

High

Integrity (I):

High

Availability (A):

High

Products

Advantech iView

References

Canonical

CVE-2021-22652 (https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-22652)

Miscellaneous

https://us-cert.cisa.gov/ics/advisories/icsa-21-040-02

Rapid7

Moderate

CVE-2021-22652

Moderate

Very High

None

None

Network

CVE-2021-22652

Description

Add Assessment

Ratings

Technical Analysis

CVSS V3 Severity and Metrics

General Information

Products

References

Canonical

Miscellaneous

Additional Info

Technical Analysis

Moderate

CVE-2021-22652

Moderate

Very High

None

None

Network

CVE-2021-22652

Description

Add Assessment

Ratings

Technical Analysis

CVSS V3 Severity and Metrics

General Information

Products

References

Canonical

Miscellaneous

Additional Info

Technical Analysis

Quick Cookie Notification