Add detection for CVE-2024-47575

agent/Resources/FortimangerCerts/w00t_cert.bin

@@ -0,0 +1,23 @@
+-----BEGIN CERTIFICATE-----
+MIIDyjCCArKgAwIBAgIEAuQYnjANBgkqhkiG9w0BAQsFADCBoDELMAkGA1UEBhMC
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+gJ6SLZBYXJeJjx15zjM=
+-----END CERTIFICATE-----

agent/Resources/FortimangerCerts/w00t_key.bin

@@ -0,0 +1,27 @@
+-----BEGIN RSA PRIVATE KEY-----
+MIIEogIBAAKCAQEAvU7JShNHCmCFsdjaTwPBofzBp0S7lGpfhKMSVcOyaBAcoxWs
+RH1/MxrR7zS/H0hiqc5H7ZbFSVi47TmZZhgCzRcDQdX+BM3S941n/G4skrBx07WC
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+ef0exm2YD7IcAzvTwPJMpbOBxZzMbD9NT+NNBjiWSKK964zcwMo=
+-----END RSA PRIVATE KEY-----

agent/exploits/cve_2024_47575.py

@@ -0,0 +1,161 @@
+"""Agent Asteroid implementation for CVE-2024-47575"""
+
+import socket
+import re
+import struct
+import ssl
+import random
+
+from agent import definitions
+from agent import exploits_registry
+from agent.exploits import webexploit
+
+VULNERABILITY_TITLE = "Missing Authentication for critical function in FortiManager"
+VULNERABILITY_REFERENCE = "CVE-2024-47575"
+VULNERABILITY_DESCRIPTION = (
+    "A missing authentication for critical function in FortiManager 7.6.0, FortiManager 7.4.0 through 7.4.4, FortiManager 7.2.0 through 7.2.7,"
+    " FortiManager 7.0.0 through 7.0.12, FortiManager 6.4.0 through 6.4.14, FortiManager 6.2.0 through 6.2.12, Fortinet FortiManager Cloud 7.4.1 through 7.4.4, FortiManager Cloud 7.2.1 through 7.2.7, FortiManager Cloud 7.0.1 through 7.0.12,"
+    " FortiManager Cloud 6.4.1 through 6.4.7 allows attacker to execute arbitrary code or commands via specially crafted requests."
+)
+RISK_RATING = "CRITICAL"
+
+REQUEST_GETIP = b"""get ip
+serialno=FGVMEVWG8YMT3R63
+mgmtid=00000000-0000-0000-0000-000000000000
+platform=FortiGate-VM64
+fos_ver=700
+minor=2
+patch=2
+build=1255
+branch=1255
+maxvdom=2
+fg_ip=192.168.1.53
+hostname=FGVMEVWG8YMT3R63
+harddisk=yes
+biover=04000002
+harddisk_size=30720
+logdisk_size=30235
+mgmt_mode=normal
+enc_flags=0
+first_fmgid=
+probe_mode=yes
+vdom=root
+intf=port1
+\0""".replace(b"\n", b"\r\n")
+
+REQUEST_AUTH = b"""get auth
+serialno=FGVMEVWG8YMT3R63
+mgmtid=00000000-0000-0000-0000-000000000000
+platform=FortiGate-60E
+fos_ver=700
+minor=2
+patch=4
+build=1396
+branch=1396
+maxvdom=2
+fg_ip=192.168.1.53
+hostname=FortiGate
+harddisk=yes
+biover=04000002
+harddisk_size=30720
+logdisk_size=30107
+mgmt_mode=normal
+enc_flags=0
+mgmtip=192.168.1.53
+mgmtport=443
+\0""".replace(b"\n", b"\r\n")
+
+REQUEST_FILE_EXCHANGE = b"""get file_exchange
+localid=REPLACE_LOCAL_ID
+chan_window_sz=32768
+deflate=gzip
+file_exch_cmd=put_json_cmd
+
+\0""".replace(b"\n", b"\r\n").replace(
+    b"REPLACE_LOCAL_ID", str(random.randint(100, 999)).encode()
+)
+
+FGFM_PORT = 541
+
+
+def _sendmsg(socket: ssl.SSLSocket, request: bytes) -> bytes:
+    """Send a message over an SSL socket and read the response."""
+    message = struct.pack(">II", 0x36E01100, len(request) + 8) + request
+    socket.send(message)
+    try:
+        hdr = socket.read(8)
+    except TimeoutError:
+        return b""
+
+    if len(hdr) != 8:
+        return hdr
+
+    try:
+        magic, size = struct.unpack(">II", hdr)
+        return socket.read(size)
+    except TimeoutError:
+        return b""
+
+
+def _create_ssl_sock(target: str) -> ssl.SSLSocket:
+    """Create an SSL socket connected to the target."""
+    host = (target, FGFM_PORT)
+    context = ssl.SSLContext(ssl.PROTOCOL_TLS_CLIENT)
+
+    context.load_cert_chain(
+        certfile="./agent/Resources/FortimangerCerts/w00t_cert.bin",
+        keyfile="./agent/Resources/FortimangerCerts/w00t_key.bin",
+    )
+    context.check_hostname = False
+    context.verify_mode = ssl.CERT_NONE
+
+    s = socket.create_connection(host, 30)
+    ssl_sock = context.wrap_socket(s)
+    return ssl_sock
+
+
+@exploits_registry.register
+class CVE202447575Exploit(webexploit.WebExploit):
+    accept_request = definitions.Request(method="GET", path="/p/login/")
+    accept_pattern = [re.compile("FortiManager")]
+
+    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]:
+        """Rule to detect specific vulnerability on a specific target.
+
+        Args:
+            target: Target to scan.
+
+        Returns:
+            List of identified vulnerabilities.
+        """
+        vulnerabilities: list[definitions.Vulnerability] = []
+        ssl_sock = _create_ssl_sock(target.host)
+
+        _sendmsg(ssl_sock, REQUEST_GETIP)
+        _sendmsg(ssl_sock, REQUEST_AUTH)
+        response = _sendmsg(ssl_sock, REQUEST_FILE_EXCHANGE)
+
+        try:
+            decoded_response = response.decode()
+            response_lines = decoded_response.split("\r\n")
+
+            remote_id_line = next(
+                (line for line in response_lines if line.startswith("remoteid=")), None
+            )
+
+            if remote_id_line is not None:
+                remote_id = remote_id_line.split("=")[1].strip()
+                if remote_id != "":
+                    vulnerability = self._create_vulnerability(target)
+                    vulnerabilities.append(vulnerability)
+        except (UnicodeDecodeError, IndexError, ValueError):
+            return vulnerabilities
+
+        return vulnerabilities

tests/exploits/cve_2024_47575_test.py

@@ -0,0 +1,72 @@
+from unittest import mock
+from agent.exploits import cve_2024_47575
+from agent import definitions
+import typing
+
+
+MockSendmsgSideEffect = typing.Callable[[mock.MagicMock, bytes], bytes]
+
+
+@mock.patch("agent.exploits.cve_2024_47575._create_ssl_sock")
+@mock.patch("agent.exploits.cve_2024_47575._sendmsg")
+def testCVE202447575_whenVulnerable_reportFinding(
+    mock_sendmsg: mock.MagicMock, mock_create_ssl_sock: mock.MagicMock
+) -> None:
+    """CVE-2024-47575 unit test: case when target is vulnerable."""
+
+    mock_ssl_socket = mock.MagicMock()
+    mock_create_ssl_sock.return_value = mock_ssl_socket
+
+    def mock_sendmsg_side_effect(sock: mock.MagicMock, request: bytes) -> bytes:
+        if b"get ip" in request:
+            return b"0\r\nrequest=ip\r\nip=169.254.0.20\r\nmgmtid=1624783840\r\nregister_status=0\r\nmgmtport=443\r\ncur_tun_serial= \r\nkeepalive_interval=120\r\nchan_window_sz=32768\r\nsock_timeout=360\r\n\r\n\x00"
+        elif b"get auth" in request:
+            return b"0\r\nrequest=auth\r\nserialno=FMG-VM0A14000310\r\nuser=\r\npasswd=\r\nmgmtport=443\r\nkeepalive_interval=120\r\nchan_window_sz=32768\r\nsock_timeout=360\r\nmgmtid=1624783840\r\n\r\n\x00"
+        elif b"get file_exchange" in request:
+            return b"\naction=ack\r\nremoteid=178\r\nlocalid=27189\r\nchan_window_sz=32768\r\ndeflate=gzip\r\n\r\n\x00"
+        return b""
+
+    mock_sendmsg.side_effect = mock_sendmsg_side_effect
+
+    exploit_instance = cve_2024_47575.CVE202447575Exploit()
+    target = definitions.Target("http", "localhost", 80)
+    vulnerabilities = exploit_instance.check(target)
+
+    assert len(vulnerabilities) > 0
+    vulnerability = vulnerabilities[0]
+    assert (
+        vulnerability.entry.title
+        == "Missing Authentication for critical function in FortiManager"
+    )
+    assert vulnerability.technical_detail == (
+        "http://localhost:80 is vulnerable to CVE-2024-47575, "
+        "Missing Authentication for critical function in FortiManager"
+    )
+
+
+@mock.patch("agent.exploits.cve_2024_47575._create_ssl_sock")
+@mock.patch("agent.exploits.cve_2024_47575._sendmsg")
+def testCVE202447575_whenSafe_reportNothing(
+    mock_sendmsg: mock.MagicMock, mock_create_ssl_sock: mock.MagicMock
+) -> None:
+    """CVE-2024-47575 unit test: case when target is safe."""
+
+    mock_ssl_socket = mock.MagicMock()
+    mock_create_ssl_sock.return_value = mock_ssl_socket
+
+    def mock_sendmsg_side_effect(sock: mock.MagicMock, request: bytes) -> bytes:
+        if b"get ip" in request:
+            return b"0\r\nrequest=ip\r\nip=169.254.0.20\r\nmgmtid=1624783840\r\nregister_status=0\r\nmgmtport=443\r\ncur_tun_serial= \r\nkeepalive_interval=120\r\nchan_window_sz=32768\r\nsock_timeout=360\r\n\r\n\x00"
+        elif b"get auth" in request:
+            return b"0\r\nrequest=auth\r\nserialno=FMG-VM0A14000310\r\nuser=\r\npasswd=\r\nmgmtport=443\r\nkeepalive_interval=120\r\nchan_window_sz=32768\r\nsock_timeout=360\r\nmgmtid=1624783840\r\n\r\n\x00"
+        elif b"get file_exchange" in request:
+            return b"\naction=error\r\nlocalid=0\r\nchan_window_sz=32768\r\ndeflate=gzip\r\n\r\n\x00"
+        return b""
+
+    mock_sendmsg.side_effect = mock_sendmsg_side_effect
+
+    exploit_instance = cve_2024_47575.CVE202447575Exploit()
+    target = definitions.Target("http", "localhost", 80)
+
+    vulnerabilities = exploit_instance.check(target)
+    assert len(vulnerabilities) == 0