CVE-2024-12011: TCP/IP Gateway Information Disclosure Flaw

CVE-2024-12011 Overview

CVE-2024-12011 is a buffer over-read vulnerability [CWE-126] affecting the 130.8005 TCP/IP Gateway running firmware version 12h. The flaw resides in the device's embedded web server and exposes process memory through an information disclosure condition. A remote unauthenticated attacker can leverage the memory leak to extract valid authentication tokens belonging to active user sessions. With those tokens, the attacker can bypass authentication and access privileged functionality on the gateway.

Critical Impact
Unauthenticated remote attackers can leak session tokens from gateway memory and bypass authentication on the affected industrial TCP/IP gateway.

Affected Products

130.8005 TCP/IP Gateway
Firmware version 12h
Embedded web server component on the gateway

Discovery Timeline

2025-02-13 - CVE-2024-12011 published to the National Vulnerability Database
2026-04-15 - Last updated in the NVD database

Technical Details for CVE-2024-12011

Vulnerability Analysis

The vulnerability is classified as a buffer over-read [CWE-126]. The embedded web server reads beyond the bounds of an allocated buffer when handling specific requests. The data returned to the client includes residual memory contents from adjacent regions of the process address space.

Because the gateway's web server stores authentication tokens for logged-in users in process memory, those tokens can appear within the leaked bytes. An attacker who repeatedly triggers the over-read can harvest valid session material without supplying credentials.

The issue requires user interaction according to the CVSS vector, indicating an authenticated user must be active for tokens to be present in memory. Confidentiality impact is high because the leaked material grants direct access to authenticated functionality.

Root Cause

The root cause is improper bounds checking inside the web server's response handling. The server reads more bytes from a source buffer than the buffer contains, returning uninitialized or adjacent memory to the caller. No length validation prevents the read from crossing the intended boundary.

Attack Vector

The attack vector is network based and requires no privileges. A remote attacker sends crafted HTTP requests to the gateway's web interface. The server returns responses containing leaked memory fragments. The attacker parses responses to extract token strings, then replays those tokens against authenticated endpoints to bypass the login flow. See the Nozomi Networks Vulnerability Advisory for additional technical details.

Detection Methods for CVE-2024-12011

Indicators of Compromise

Repeated HTTP requests from a single source to the gateway's web server within short time windows
Authenticated API calls originating from IP addresses that never completed a login flow
Session tokens reused across multiple distinct client IP addresses or user agents
Unusually large or malformed HTTP responses returned by the gateway web server

Detection Strategies

Inspect web server logs for high-frequency requests to endpoints that return variable-length responses
Correlate authentication events with subsequent API activity to find sessions used without a preceding login
Apply network monitoring to flag anomalous request patterns aimed at the gateway management interface
Compare response sizes against expected baselines to surface over-read conditions in transit

Monitoring Recommendations

Forward gateway logs to a centralized analytics platform for cross-session correlation
Alert on authentication token usage from geographies or networks outside operational norms
Track failed and successful authentications against the gateway and flag mismatched ratios
Monitor for new client fingerprints accessing privileged endpoints without prior login traffic

How to Mitigate CVE-2024-12011

Immediate Actions Required

Restrict network reachability of the gateway's web interface to trusted management networks only
Place the device behind a firewall or VPN and block direct internet exposure
Invalidate active authentication sessions and force re-authentication for all users
Review historical logs for evidence of token reuse or unauthenticated access to privileged endpoints

Patch Information

Consult the Nozomi Networks Vulnerability Advisory for vendor remediation guidance and updated firmware availability. Apply firmware updates that supersede version 12h as soon as the vendor provides a fixed release.

Workarounds

Segment the gateway onto an isolated management VLAN with strict access control lists
Disable the web management interface when it is not actively required for operations
Require VPN access with multi-factor authentication for any administrative connection
Rotate authentication credentials and tokens on a frequent schedule until the patch is deployed

bash

# Example firewall rule restricting gateway web interface to a management subnet
iptables -A INPUT -p tcp --dport 80 -s 10.10.0.0/24 -j ACCEPT
iptables -A INPUT -p tcp --dport 80 -j DROP
iptables -A INPUT -p tcp --dport 443 -s 10.10.0.0/24 -j ACCEPT
iptables -A INPUT -p tcp --dport 443 -j DROP