CVE-2022-4729 (published 2022-12-27T15:15Z)

A vulnerability was found in Graphite Web and classified as problematic. This issue affects some unknown processing of the component Template Name Handler. The manipulation leads to cross site scripting. The attack may be initiated remotely. The exploit has been disclosed to the public and may be used. The name of the patch is 2f178f490e10efc03cd1d27c72f64ecab224eb23. It is recommended to apply a patch to fix this issue. The associated identifier of this vulnerability is VDB-216743.

CVSS v3 base score: 5.4, MEDIUM (CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N)

Weakness information:
cwe_id: CWE-79
cwe_name: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
description: The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.
extended_description: 
            Cross-site scripting (XSS) vulnerabilities occur when:
            
               Untrusted data enters a web application, typically from a web request.
               The web application dynamically generates a web page that contains this untrusted data.
               During page generation, the application does not prevent the data from containing content that is executable by a web browser, such as JavaScript, HTML tags, HTML attributes, mouse events, Flash, ActiveX, etc.
               A victim visits the generated web page through a web browser, which contains malicious script that was injected using the untrusted data.
               Since the script comes from a web page that was sent by the web server, the victim's web browser executes the malicious script in the context of the web server's domain.
               This effectively violates the intention of the web browser's same-origin policy, which states that scripts in one domain should not be able to access resources or run code in a different domain.
            
            There are three main kinds of XSS:
            
               
                  Type 1: Reflected XSS (or Non-Persistent) - 
         			The server reads data directly from the HTTP request and reflects it back in the HTTP response. Reflected XSS exploits occur when an attacker causes a victim to supply dangerous content to a vulnerable web application, which is then reflected back to the victim and executed by the web browser. The most common mechanism for delivering malicious content is to include it as a parameter in a URL that is posted publicly or e-mailed directly to the victim. URLs constructed in this manner constitute the core of many phishing schemes, whereby an attacker convinces a victim to visit a URL that refers to a vulnerable site. After the site reflects the attacker's content back to the victim, the content is executed by the victim's browser.
               
                  Type 2: Stored XSS (or Persistent) - 
               The application stores dangerous data in a database, message forum, visitor log, or other trusted data store. At a later time, the dangerous data is subsequently read back into the application and included in dynamic content. From an attacker's perspective, the optimal place to inject malicious content is in an area that is displayed to either many users or particularly interesting users. Interesting users typically have elevated privileges in the application or interact with sensitive data that is valuable to the attacker. If one of these users executes malicious content, the attacker may be able to perform privileged operations on behalf of the user or gain access to sensitive data belonging to the user. For example, the attacker might inject XSS into a log message, which might not be handled properly when an administrator views the logs.
            
               
                  Type 0: DOM-Based XSS - 
               In DOM-based XSS, the client performs the injection of XSS into the page; in the other types, the server performs the injection. DOM-based XSS generally involves server-controlled, trusted script that is sent to the client, such as Javascript that performs sanity checks on a form before the user submits it. If the server-supplied script processes user-supplied data and then injects it back into the web page (such as with dynamic HTML), then DOM-based XSS is possible.
            
            
            Once the malicious script is injected, the attacker can perform a variety of malicious activities. The attacker could transfer private information, such as cookies that may include session information, from the victim's machine to the attacker. The attacker could send malicious requests to a web site on behalf of the victim, which could be especially dangerous to the site if the victim has administrator privileges to manage that site. Phishing attacks could be used to emulate trusted web sites and trick the victim into entering a password, allowing the attacker to compromise the victim's account on that web site. Finally, the script could exploit a vulnerability in the web browser itself possibly taking over the victim's machine, sometimes referred to as "drive-by hacking."
            In many cases, the attack can be launched without the victim even being aware of it. Even with careful users, attackers frequently use a variety of methods to encode the malicious portion of the attack, such as URL encoding or Unicode, so the request looks less suspicious.
         
         

Fix information:
repo_url: https://github.com/graphite-project/graphite-web
commit_details: repo_url: https://github.com/graphite-project/graphite-web
author: Michail Safronov
author_date: 2022-10-31 15:22:17+05:00
msg: Fix XSS in some dashboards queries (#2785)

* prevent xss on time range text fields

* prevent xss on dashbord queries
repository: repo_url: https://github.com/graphite-project/graphite-web
repo_name: graphite-project/graphite-web
description: A highly scalable real-time graphing system
repo_language: JavaScript
owner: graphite-project
file_changes: filename: dashboard.js
change_type: ModificationType.MODIFY
diff: @@ -163,6 +163,10 @@ function htmlEncode(input) {
   });
 }
 
+function htmlStriped(input) {
+  return htmlEncode(input).replace(/\s/g, '_')
+}
+
 function initDashboard () {
 
   // Populate naming-scheme based datastructures
@@ -1229,7 +1233,7 @@ function selectRelativeTime() {
     fieldLabel: 'Show the past',
     width: 90,
     allowBlank: false,
-    regex: /\d+/,
+    regex: /^\d+$/,
     regexText: 'Please enter a number',
     value: TimeRange.relativeStartQuantity
   });
@@ -1251,7 +1255,7 @@ function selectRelativeTime() {
     fieldLabel: 'Until',
     width: 90,
     allowBlank: true,
-    regex: /\d+/,
+    regex: /^\d+$/,
     regexText: 'Please enter a number',
     value: TimeRange.relativeUntilQuantity
   });
@@ -1291,10 +1295,10 @@ function selectRelativeTime() {
 
   function updateTimeRange() {
     TimeRange.type = 'relative';
-    TimeRange.relativeStartQuantity = quantityField.getValue();
-    TimeRange.relativeStartUnits = unitField.getValue();
-    TimeRange.relativeUntilQuantity = untilQuantityField.getValue();
-    TimeRange.relativeUntilUnits = untilUnitField.getValue();
+    TimeRange.relativeStartQuantity = htmlStriped(quantityField.getValue());
+    TimeRange.relativeStartUnits = htmlStriped(unitField.getValue());
+    TimeRange.relativeUntilQuantity = htmlStriped(untilQuantityField.getValue());
+    TimeRange.relativeUntilUnits = htmlStriped(untilUnitField.getValue());
     win.close();
     timeRangeUpdated();
   }

programming_language: JavaScript
filename: views.py
change_type: ModificationType.MODIFY
diff: @@ -16,6 +16,7 @@ from graphite.dashboard.send_graph import send_graph_email
 from graphite.render.views import renderView
 from graphite.util import json
 from graphite.user_util import isAuthenticated
+from graphite.errors import handleInputParameterError, str_param
 
 fieldRegex = re.compile(r'<([^>]+)>')
 defaultScheme = {
@@ -108,7 +109,9 @@ class DashboardConfig:
 config = DashboardConfig()
 
 
+@handleInputParameterError
 def dashboard(request, name=None):
+  name = str_param('name', name)
   dashboard_conf_missing = False
 
   try:
@@ -155,7 +158,9 @@ def dashboard(request, name=None):
   return render(request, "dashboard.html", context)
 
 
+@handleInputParameterError
 def template(request, name, val):
+  name = str_param('name', name)
   template_conf_missing = False
 
   try:
@@ -221,7 +226,10 @@ def getPermissions(user):
   return permissions
 
 
+@handleInputParameterError
 def save(request, name):
+  name = str_param('name', name)
+
   if 'change' not in getPermissions(request.user):
     return json_response( dict(error="Must be logged in with appropriate permissions to save") )
   # Deserialize and reserialize as a validation step
@@ -238,7 +246,11 @@ def save(request, name):
   return json_response( dict(success=True) )
 
 
+@handleInputParameterError
 def save_template(request, name, key):
+  name = str_param('name', name)
+  key = str_param('key', key)
+
   if 'change' not in getPermissions(request.user):
     return json_response( dict(error="Must be logged in with appropriate permissions to save the template") )
   # Deserialize and reserialize as a validation step
@@ -257,7 +269,9 @@ def save_template(request, name, key):
   return json_response( dict(success=True) )
 
 
+@handleInputParameterError
 def load(request, name):
+  name = str_param('name', name)
   try:
     dashboard = Dashboard.objects.get(name=name)
   except Dashboard.DoesNotExist:
@@ -266,7 +280,9 @@ def load(request, name):
   return json_response( dict(state=json.loads(dashboard.state)) )
 
 
+@handleInputParameterError
 def load_template(request, name, val):
+  name = str_param('name', name)
   try:
     template = Template.objects.get(name=name)
   except Template.DoesNotExist:
@@ -277,7 +293,9 @@ def load_template(request, name, val):
   return json_response( dict(state=state) )
 
 
+@handleInputParameterError
 def delete(request, name):
+  name = str_param('name', name)
   if 'delete' not in getPermissions(request.user):
     return json_response( dict(error="Must be logged in with appropriate permissions to delete") )
 
@@ -290,7 +308,9 @@ def delete(request, name):
     return json_response( dict(success=True) )
 
 
+@handleInputParameterError
 def delete_template(request, name):
+  name = str_param('name', name)
   if 'delete' not in getPermissions(request.user):
     return json_response( dict(error="Must be logged in with appropriate permissions to delete the template") )
 

programming_language: Python
filename: errors.py
change_type: ModificationType.MODIFY
diff: @@ -1,5 +1,6 @@
 from django.http import HttpResponseBadRequest
 from graphite.logger import log
+from graphite.util import htmlEscape, is_unsafe_str
 
 
 class NormalizeEmptyResultError(Exception):
@@ -94,12 +95,22 @@ class InputParameterError(ValueError):
         return msg
 
 
-# Replace special characters "&", "<" and ">" to HTML-safe sequences.
-def escape(s):
-    s = s.replace("&", "&amp;")  # Must be done first!
-    s = s.replace("<", "&lt;")
-    s = s.replace(">", "&gt;")
+def safe_param(name, s):
+    if is_unsafe_str(s):
+        raise InputParameterError("{} contain unsafe symbols".format(name))
+    return s
+
+
+def is_unclean_str(s):
+    for symbol in '&<>~!@#$%^*()`':
+        if s.find(symbol) >= 0:
+            return True
+    return False
+
 
+def str_param(name, s):
+    if s is not None and is_unclean_str(s):
+        raise InputParameterError("{} contain restricted symbols".format(name))
     return s
 
 
@@ -111,6 +122,6 @@ def handleInputParameterError(f):
         except InputParameterError as e:
             msgStr = str(e)
             log.warning('%s', msgStr)
-            return HttpResponseBadRequest(escape(msgStr))
+            return HttpResponseBadRequest(htmlEscape(msgStr))
 
     return new_f

programming_language: Python
filename: util.py
change_type: ModificationType.MODIFY
diff: @@ -128,6 +128,21 @@ def find_escaped_pattern_fields(pattern_string):
       yield index
 
 
+# Replace special characters "&", "<" and ">" to HTML-safe sequences.
+def htmlEscape(s):
+    s = s.replace("&", "&amp;")  # Must be done first!
+    s = s.replace("<", "&lt;")
+    s = s.replace(">", "&gt;")
+    return s
+
+
+def is_unsafe_str(s):
+    for symbol in '<>':
+        if s.find(symbol) >= 0:
+            return True
+    return False
+
+
 def load_module(module_path, member=None):
   module_name = splitext(basename(module_path))[0]
   try:  # 'U' is default from Python 3.0 and deprecated since 3.9

programming_language: Python
filename: base.py
change_type: ModificationType.MODIFY
diff: @@ -2,6 +2,13 @@ from django.test import TestCase as OriginalTestCase
 from graphite.worker_pool.pool import stop_pools
 
 
+def is_unsafe_str(s):
+    for symbol in '<>':
+        if s.find(symbol) > 0:
+            return True
+        return False
+
+
 class TestCase(OriginalTestCase):
     def tearDown(self):
         stop_pools()
@@ -15,5 +22,6 @@ class TestCase(OriginalTestCase):
                 " (expected %d)" % (response.status_code, status_code)
             )
 
-        xss = response.content.find(b"<") != -1 or response.content.find(b">") != -1
-        self.assertFalse(xss, msg=msg_prefix+str(response.content))
+        content = str(response.content)
+        xss = is_unsafe_str(content)
+        self.assertFalse(xss, msg=msg_prefix+content)

programming_language: Python
filename: test_dashboard.py
change_type: ModificationType.MODIFY
diff: @@ -20,6 +20,8 @@ try:
 except ImportError:
     from django.contrib.auth.models import User
 
+from graphite.util import htmlEscape
+
 
 class DashboardTest(TestCase):
     # Set config to the test config file
@@ -244,23 +246,42 @@ class DashboardTest(TestCase):
         self.assertEqual(response.status_code, 200)
         self.assertEqual(response.content, b'{"templates": []}')
 
+    def test_dashboard_save_temporary_xss_name(self):
+        xssStr = htmlEscape('<img src=1 onerror=alert(1)>')
+        url = '/graphite/dashboard/save_template/' + xssStr + '/testkey'
+
+        request = copy.deepcopy(self.testtemplate)
+        response = self.client.post(url, request)
+        self.assertContains(response, 'name contain restricted symbols', status_code=400)
+
+    def test_dashboard_save_temporary_xss_key(self):
+        xssStr = htmlEscape('<img src=1 onerror=alert(1)>')
+        url = '/graphite/dashboard/save_template/testtemplate/' + xssStr
+
+        request = copy.deepcopy(self.testtemplate)
+        response = self.client.post(url, request)
+        self.assertContains(response, 'key contain restricted symbols', status_code=400)
+
     def test_dashboard_save_template(self):
         url = reverse('dashboard_save_template', args=['testtemplate', 'testkey'])
         request = copy.deepcopy(self.testtemplate)
         response = self.client.post(url, request)
         self.assertEqual(response.status_code, 200)
+        self.assertEqual(response.content, b'{"success": true}')
 
-        # Save again after it now exists
+    # Save again after it now exists
     def test_dashboard_save_template_overwrite(self):
         url = reverse('dashboard_save_template', args=['testtemplate', 'testkey'])
         request = copy.deepcopy(self.testtemplate)
         response = self.client.post(url, request)
         self.assertEqual(response.status_code, 200)
+        self.assertEqual(response.content, b'{"success": true}')
 
         url = reverse('dashboard_save_template', args=['testtemplate', 'testkey'])
         request = copy.deepcopy(self.testtemplate)
         response = self.client.post(url, request)
         self.assertEqual(response.status_code, 200)
+        self.assertEqual(response.content, b'{"success": true}')
 
     def test_dashboard_find_template(self):
         url = reverse('dashboard_save_template', args=['testtemplate', 'testkey'])

programming_language: Python