Safe3-uusec-waf/rules/command-injection-detection.lua
UUSEC Technology e66cca6014 v7.0.0
### Feature Updates

**Interface & Management**

- Redesigned main program and management interface with improved aesthetics and usability, supports UI language switching (English/Chinese)
- Added Rule Collections functionality: Create custom rule templates for batch configuration
- Introduced whitelist rules that terminate further rule matching upon success
- UUSEC WAF Rules API intelligent suggestions during advanced rule editing:ml-citation
- New plugin management supporting hot-reloaded plugins to extend WAF capabilities

**Protocol & Optimization**

- Supports streaming responses for continuous data push (e.g., LLM stream outputs)
- Enables Host header modification during proxying for upstream service access
- Search engine validation: `waf.searchEngineValid(dns,ip,ua)` prevents high-frequency rules from affecting SEO indexing
- Interception log report generation (HTML/PDF exports)
- Automatic rotation of UUSEC WAF error/access logs to prevent performance issues

**Security & Infrastructure**

- Expanded free SSL certificate support: HTTP-01 & DNS-01 verification across 50+ domain providers
- Customizable advanced WAF settings: HTTP2, GZIP, HTTP Caching, SSL protocols, etc
- Cluster configuration: Manage UUSEC WAF nodes and ML servers via web UI
2025-07-02 09:47:41 +08:00

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Lua

--[[
Rule name: Command injection detection
Filtering stage: Request phase
Threat level: Critical
Rule description: Detect shell command injection attacks in URLs, cookies, and forms. The RCE semantic detection engine can be used to detect various deformations, such as cat$IFS/etc/os-release or c$()at /e??/p?????, etc.
--]]
local checkRCE = waf.checkRCE
local kvFilter = waf.kvFilter
local function rMatch(v)
if checkRCE(v, 1) then
return true, v
end
return false
end
local function rMatch1(v)
if checkRCE(v, 0) then
return true, v
end
return false
end
local function rMatch2(v)
if checkRCE(v, 2) then
return true, v
end
return false
end
local form = waf.form
if form then
local m, d = kvFilter(form["FORM"], rMatch, true)
if m then
return m, d, true
end
end
local queryString = waf.queryString
if queryString then
local m, d = kvFilter(queryString, rMatch2)
if m then
return m, d, true
end
end
local cookies = waf.cookies
if cookies then
local m, d = kvFilter(cookies, rMatch1, true)
if m then
return m, d, true
end
end
local m, d = kvFilter(waf.reqHeaders, rMatch)
if m then
return m, d, true
end
return false