CVE-2024-9005: Insecure Deserialization RCE Vulnerability

CVE-2024-9005 Overview

CVE-2024-9005 is a deserialization of untrusted data vulnerability [CWE-502] disclosed by Schneider Electric. The flaw allows an attacker to achieve remote code execution when unsafely deserialized data is posted to the affected web server. Successful exploitation requires low-privileged authentication and user interaction, but delivers high impact to confidentiality, integrity, and availability. Schneider Electric published the issue in security notice SEVD-2024-282-05.

Critical Impact
An authenticated attacker can send crafted serialized objects to the web server and execute arbitrary code in the context of the vulnerable service.

Affected Products

Schneider Electric product line covered by advisory SEVD-2024-282-05
Refer to the vendor advisory for the complete list of affected models and firmware versions
Consult vendor documentation for confirmation against deployed asset inventory

Discovery Timeline

2024-10-08 - CVE-2024-9005 published to NVD
2026-06-17 - Last updated in NVD database

Technical Details for CVE-2024-9005

Vulnerability Analysis

The vulnerability is classified under [CWE-502]: Deserialization of Untrusted Data. The affected web server accepts serialized objects from clients and reconstructs them without validating the object graph or restricting allowed types. During deserialization, gadget chains within available libraries can be triggered, leading to arbitrary code execution on the host.

An attacker must possess valid low-privilege credentials and induce user interaction to reach the vulnerable endpoint. Once the payload is posted, the server processes it inline and executes attacker-controlled logic. The impact scope is limited to the vulnerable component but includes full compromise of confidentiality, integrity, and availability within that boundary.

Root Cause

The root cause is the server's use of an unsafe deserialization routine on user-supplied data submitted through HTTP POST requests. The routine does not enforce a type allowlist, does not validate signatures on serialized payloads, and does not sandbox the reconstruction process. Any client capable of authenticating can submit an object graph that instantiates classes with side effects during deserialization.

Attack Vector

The attack vector is network-based. An authenticated attacker crafts a malicious serialized object using known gadget chains for the runtime hosting the web server. The attacker submits the payload to a web endpoint that accepts serialized input. On deserialization, the gadget chain executes attacker-controlled commands under the privileges of the web server process. See the Schneider Electric Security Notice for endpoint and payload specifics.

No verified public proof-of-concept code is available for this CVE at the time of writing.

Detection Methods for CVE-2024-9005

Indicators of Compromise

HTTP POST requests to the web server carrying binary or Base64-encoded serialized object payloads from unexpected source addresses
Unexpected child processes spawned by the web server process, particularly shell interpreters or scripting runtimes
Outbound connections initiated by the web server to non-standard destinations following a POST request
New or modified files in web application directories following authenticated sessions

Detection Strategies

Inspect HTTP POST bodies for serialization magic bytes and known gadget-chain class names in web application firewall logs
Correlate authentication events with subsequent process creation on the affected host to identify anomalous execution chains
Baseline normal parent-child process relationships for the web server and alert on deviations

Monitoring Recommendations

Enable verbose logging on the affected web server, including full request URIs, authenticated user identifiers, and payload metadata
Forward web server, authentication, and endpoint process telemetry to a centralized analytics platform for correlation
Alert on any process spawned by the web server binary that is not part of the documented runtime profile

How to Mitigate CVE-2024-9005

Immediate Actions Required

Apply the remediation guidance published by Schneider Electric in advisory SEVD-2024-282-05 to all affected assets
Restrict network access to the web server so that only authorized management workstations can reach it
Rotate credentials for any accounts that could authenticate to the affected service prior to patching
Audit web server logs for suspicious POST requests dating back to the earliest possible exposure

Patch Information

Schneider Electric published patch and mitigation guidance in the Schneider Electric Security Notice SEVD-2024-282-05. Administrators should identify affected firmware or software versions in the advisory and follow the vendor-supplied update procedure.

Workarounds

Place the affected web server behind a segmented management network isolated from general user and internet traffic
Enforce strict access control lists on the web server so only administrators with a documented need can authenticate
Deploy a reverse proxy or web application firewall that blocks requests containing serialized object signatures on paths that should not accept them
Disable or remove the affected feature if it is not required in the deployment

bash

# Example: restrict inbound access to the management web server using iptables
iptables -A INPUT -p tcp --dport 443 -s 10.0.10.0/24 -j ACCEPT
iptables -A INPUT -p tcp --dport 443 -j DROP