Dynamic (#77)

tests/dynamic_fixtures/go_frameworks/echo/benign.go

@@ -0,0 +1,26 @@
+// Phase 17 (Track L.15) — echo benign control fixture.
+//
+// The /run route consults an allow-list before invoking exec, so
+// attacker bytes never reach the sink directly.
+package main
+
+import (
+	"os/exec"
+
+	"github.com/labstack/echo/v4"
+)
+
+func Run(c echo.Context) error {
+	cmd := c.QueryParam("cmd")
+	allow := map[string]string{"ls": "ls", "ps": "ps"}
+	if safe, ok := allow[cmd]; ok {
+		return exec.Command(safe).Run()
+	}
+	return nil
+}
+
+func main() {
+	e := echo.New()
+	e.GET("/run", Run)
+	_ = e
+}

tests/dynamic_fixtures/go_frameworks/echo/vuln.go

@@ -0,0 +1,27 @@
+// Phase 17 (Track L.15) — echo CMDI vuln fixture.
+//
+// The /run route forwards a `cmd` query parameter straight into
+// `os/exec.Command`.  Adapter binding: `e.GET("/run", Run)` with
+// `cmd` flowing through `c.QueryParam`.
+package main
+
+import (
+	"fmt"
+	"os/exec"
+
+	"github.com/labstack/echo/v4"
+)
+
+func Run(c echo.Context) error {
+	cmd := c.QueryParam("cmd")
+	fmt.Print("__NYX_SINK_HIT__\n")
+	out, err := exec.Command("sh", "-c", cmd).CombinedOutput()
+	fmt.Print(string(out))
+	return err
+}
+
+func main() {
+	e := echo.New()
+	e.GET("/run", Run)
+	_ = e
+}