event on potential local privillefe escalation via env var misuse

Signed-off-by: h4l0gen <[email protected]>

events/syscall/potential_local_privillege_escalation_via_env_var_misuse

@@ -0,0 +1,44 @@
+//go:build linux
+// +build linux
+
+// SPDX-License-Identifier: Apache-2.0
+/*
+Copyright (C) 2024 The Falco Authors.
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+    http://www.apache.org/licenses/LICENSE-2.0
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package syscall
+
+import (
+    "os"
+    "os/exec"
+
+    "github.com/falcosecurity/event-generator/events"
+)
+
+var _ = events.Register(PotentialLocalPrivillegeEscalation)
+
+func PotentialLocalPrivillegeEscalation(h events.Helper) error {
+    // Set the GLIBC_TUNABLES environment variable
+    os.Setenv("GLIBC_TUNABLES", "glibc.tune.hwcaps=-WAITED,glibc.tune.secrets=2")
+
+    cmd := exec.Command("bash", "-c", "id")
+    cmd.Env = os.Environ()
+
+    h.Log().Info("Process run with suspect environment variable which could be attempting privilege escalation")
+    err := cmd.Run()
+    if err != nil {
+        h.Log().WithError(err).Error("Failed to execute process with modified environment")
+        return err
+    }
+
+    return nil
+}