CVE-2024-12212: CSP File Parsing RCE Vulnerability

CVE-2024-12212 Overview

CVE-2024-12212 is an out-of-bounds read vulnerability [CWE-125] in the parsing of Cscape Communication Setup Profile (CSP) files. The flaw stems from missing validation of user-supplied data during file parsing. An attacker can craft a malicious CSP file that forces the parser to read past the end of an allocated buffer. Successful exploitation can lead to arbitrary code execution in the context of the user opening the file. Horner Automation Cscape is engineering software used to program industrial control system (ICS) controllers, placing this issue in a critical operational technology (OT) context. The vulnerability requires user interaction and local access, as documented in CISA ICS Advisory ICSA-24-345-05.

Critical Impact
A maliciously crafted CSP file can trigger arbitrary code execution on engineering workstations running Cscape, providing attackers a foothold into industrial control system environments.

Affected Products

Horner Automation Cscape (see Horner Automation Software Overview)
Engineering workstations processing CSP configuration files
ICS environments relying on Cscape for controller programming

Discovery Timeline

2024-12-13 - CVE-2024-12212 published to NVD
2026-06-17 - Last updated in NVD database

Technical Details for CVE-2024-12212

Vulnerability Analysis

The vulnerability resides in the routines that parse Cscape CSP files. The parser trusts length or offset fields present in the file without validating them against the size of the underlying allocated buffer. When a specially crafted CSP file is opened, the parser dereferences memory beyond the intended structure boundary. This out-of-bounds read can leak adjacent memory contents or corrupt program state used in subsequent execution paths. Attackers who chain the primitive with predictable memory layouts can steer execution to attacker-controlled data. The result is arbitrary code execution under the privileges of the Cscape user, which is often an engineer with elevated access to ICS assets.

Root Cause

The root cause is improper input validation during file parsing, classified as an out-of-bounds read [CWE-125]. Cscape does not verify that structure lengths, offsets, and record counts inside the CSP file remain within the bounds of the allocated data structures before dereferencing them.

Attack Vector

Exploitation requires local access and user interaction. An attacker delivers a crafted CSP file through phishing, removable media, or a shared engineering repository. Once the target opens the file in Cscape, the parser processes the malicious structures and triggers the memory safety violation. No network exposure or authentication to a service is required, but the attacker must convince a legitimate user to open the file.

No verified public exploit code is available. See the CISA ICS Advisory ICSA-24-345-05 for vendor and coordinator technical details.

Detection Methods for CVE-2024-12212

Indicators of Compromise

Unexpected CSP files arriving via email, chat, or removable media on engineering workstations
Cscape process crashes or abnormal termination when opening CSP files
Child processes spawned by Cscape that are not part of normal engineering workflows
Outbound network connections from engineering workstations shortly after opening a CSP file

Detection Strategies

Monitor process creation events where Cscape is the parent and the child process is a shell, script host, or LOLBin
Alert on Cscape crash events in the Windows Application event log correlated with recent file opens
Inspect file writes of .csp files to shared directories used by engineering teams
Baseline normal Cscape behavior on operator workstations and flag deviations

Monitoring Recommendations

Collect endpoint telemetry from ICS engineering workstations into a centralized data lake for retrospective hunting
Track file provenance for CSP files, including origin host and user account that introduced them
Enable memory integrity and exploit protection telemetry on hosts running Cscape

How to Mitigate CVE-2024-12212

Immediate Actions Required

Apply the vendor update for Cscape as referenced in CISA ICS Advisory ICSA-24-345-05
Restrict Cscape execution to designated engineering workstations that are segmented from IT and internet-facing networks
Instruct engineers to open CSP files only from trusted, verified sources
Enumerate hosts with Cscape installed and prioritize patching

Patch Information

Refer to the vendor advisory linked from CISA ICS Advisory ICSA-24-345-05 and the Horner Automation Software Overview page for the fixed Cscape release. Deploy the updated version to all engineering workstations that process CSP files.

Workarounds

Block inbound CSP files at the email gateway and enforce file-type controls on removable media
Run Cscape under a standard user account rather than an administrator to limit post-exploitation impact
Apply application allowlisting to prevent Cscape from spawning unexpected child processes
Isolate engineering workstations from the broader corporate network using ICS network segmentation guidance