Detect CVE-2025-40602 - SonicWall SMA1000 Missing Authorization Exploitation in Google Chronicle
Detects exploitation attempts targeting CVE-2025-40602, a missing authorization vulnerability (CWE-862) combined with execution with unnecessary privileges (CWE-250) in SonicWall SMA1000 appliances. This KEV-listed vulnerability allows unauthenticated or insufficiently privileged attackers to access restricted resources or execute privileged operations. Detection focuses on anomalous HTTP requests to SMA1000 management interfaces, unexpected authentication bypass patterns, and post-exploitation activity indicative of privilege escalation on SMA gateway infrastructure.
MITRE ATT&CK
YARA-L Detection Query
rule cve_2025_40602_sonicwall_sma1000_missing_authz {
meta:
author = "df00tech Detection Engineering"
description = "Detects CVE-2025-40602 SonicWall SMA1000 missing authorization exploitation"
severity = "CRITICAL"
priority = "HIGH"
reference = "https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2025-0019"
events:
$req.metadata.event_type = "NETWORK_HTTP"
$req.target.port in (443, 8443, 80, 8080)
(
re.regex($req.target.url, `(?i)/(appliance|management|admin|api|vpn|config)`)
)
$req.network.http.response_code in (200, 201, 204)
re.regex($req.target.url, `(?i)/(admin|management|config|api/v[0-9])`)
$req.principal.ip != ""
match:
$req.principal.ip over 5m
outcome:
$risk_score = max(
if($req.network.http.response_code = 200 and re.regex($req.target.url, `(?i)/(admin|management)`), 80, 40)
)
$src_ip = array_distinct($req.principal.ip)
$urls_accessed = array_distinct($req.target.url)
condition:
#req >= 3
}Chronicle YARA-L 2.0 rule detecting SonicWall SMA1000 authorization bypass by monitoring for successful HTTP responses to privileged management endpoints across a 5-minute window, with risk scoring based on path sensitivity.
Data Sources
Required Tables
False Positives & Tuning
- Legitimate API integrations with SMA1000 management interface using service accounts
- Network operations center tools performing routine SMA1000 health checks
- Authorized security tools performing compliance scans against SMA1000 infrastructure
- Configuration management systems with scheduled SMA1000 API interactions
Other platforms for CVE-2025-40602
Testing Methodology
Validate this detection against 3 adversary techniques from Atomic Red Team. Each test below lists the behaviour to exercise and the telemetry you should expect to see. Executable commands and cleanup steps are available with Pro.
- Test 1SMA1000 Admin Endpoint Probe - Authorization Bypass Simulation
Expected signal: Network logs showing HTTP GET requests from the test host to the SMA1000 target IP on port 443, with URL paths matching /appliance/, /management/, /admin/, and /api/. HTTP response codes of 200 on any path indicate potential missing authorization.
- Test 2SMA1000 Configuration Extraction via Unauthorized API Access
Expected signal: Network logs showing HTTP GET requests to multiple /api/v1/ and /appliance/ paths with JSON Accept headers, followed by data transfer bytes indicating response body content was returned. File creation events in /tmp/sma1000_test/ on the attacking host.
- Test 3SMA1000 Privilege Escalation Test via Unauthenticated Admin Action
Expected signal: Network logs showing HTTP POST request to /api/v1/users endpoint with JSON body containing user creation parameters. If vulnerable, response body will contain user object with assigned ID. Authentication logs on SMA1000 should NOT show a preceding valid authentication event from the source IP.
Unlock Pro Content
Get the full detection package for CVE-2025-40602 including response playbook, investigation guide, and atomic red team tests.