External risk intelligence

InterSystems Caché Stack Buffer Overflow in UtilConfigHome CSP Endpoint

CVE advisorySeverity: CRITICAL (CVSS 9.3)

CVE-2009-20005

The vulnerability exists in an HTTP endpoint (.csp) of a database management system. Such web interfaces are frequently exposed to the network to provide administrative or application access, making them a common target for remote requests in web-facing deployment scenarios.

Buffer Overflow

Halo Surface Signal: 4 out of 5 — likely to be public-facing.

External exposure likelihood

Horizon Alert

Summary of the vulnerability and why it matters

This advisory details a critical vulnerability in a database management system that could allow unauthorized code execution over the network. The issue stems from how a specific configuration endpoint handles incoming requests, where an oversized argument can overflow a buffer and potentially enable an attacker to run their own code. The full extent of affected versions and whether a fix is available is currently undefined, making it challenging to confirm exposure.

An input error lets attackers run code remotely.
Key systems could be compromised; exposure is unclear.
Confirm relevance and understand potential impact.

Attack Path

How an attacker could exploit the issue

An attacker can reach the vulnerable component by sending a specially crafted HTTP GET request to an exposed web endpoint. This request can contain an oversized argument, which overflows a buffer in the .csp handler. Successful exploitation could lead to arbitrary code execution. The specific product version targeted and whether a fix exists are currently unknown.

No authentication or special access needed.
Send oversized argument via HTTP GET.
Arbitrary code execution.

Live Threat

Current exploitation, exposure, and threat context

This vulnerability could allow an unauthenticated attacker to execute arbitrary code on systems running the affected endpoint by sending a specially crafted HTTP request. The exact data or system functions that could be affected are not specified.

System control structures.
Specially crafted HTTP GET request.
Arbitrary code execution.

Operational Fix

Recommended remediation, mitigation, and detection steps

The UtilConfigHome.csp endpoint in InterSystems Caché is affected by a stack-based buffer overflow, potentially allowing unauthenticated remote attackers to execute arbitrary code by sending a crafted HTTP GET request. Since an exact fix and affected version range are undefined, the immediate priority is to identify all instances of the affected technology, determine their network reachability and business criticality, and locate the accountable owner to plan a risk-based remediation strategy.

Accountable team ownership must be confirmed.
Verify network exposure and business criticality.
Plan remediation based on identified risk.

Supplementary metadata

CVSS vector

Validate whether this threat affects your internet-facing exposure.

Halo Threat Intelligence helps prioritize remediation with Halo Surface Signal and H/A/L/O context. Start exposure validation with a free external attack surface trial.

Free EASM Trial See How Signal Works

Frequently asked questions

What is InterSystems Caché?

InterSystems Caché is a high-performance database management system designed for rapid transaction processing and complex data management. It frequently serves as the backend for healthcare and enterprise applications. A key feature of the platform is its support for CSP (Caché Server Pages), which enables web-based access to the database environment, allowing developers to build and deploy interactive web applications directly within the system.

What does CWE-121 mean for CVE-2009-20005?

CWE-121 represents a stack-based buffer overflow. In this CVE, the vulnerability occurs because the UtilConfigHome.csp endpoint fails to properly verify the size of data provided in an HTTP request. When an oversized argument is sent, it exceeds the memory space allocated on the system's stack, overwriting adjacent control information. This allows the incoming data to disrupt normal operations and potentially execute unauthorized instructions.

How is this vulnerability triggered?

The issue is triggered when an attacker sends a specifically crafted HTTP GET request to the UtilConfigHome.csp endpoint. The request must include an argument that exceeds the buffer's capacity to handle input. Simply visiting the endpoint or interacting with standard, properly formatted application features does not trigger the overflow; it requires the deliberate transmission of malformed, oversized data designed to exploit the missing bounds check.

Why should I care about my exposure?

Halo Surface Signal indicates that because this vulnerability resides in a web-accessible database endpoint, it is frequently exposed to the network. If your instance is reachable from the internet or even an untrusted internal network, an unauthenticated attacker could attempt to run code remotely. Identifying whether your specific installation exposes this CSP endpoint to network traffic is essential to understanding your risk.

How should I respond if I use this software?

Because a clear patch or affected version range is not defined, you must prioritize internal discovery. Start by creating an inventory of all systems running InterSystems Caché and determine which ones have the UtilConfigHome.csp endpoint active. Once identified, evaluate the network accessibility of these endpoints and assign ownership to ensure they are monitored or isolated from untrusted traffic until more definitive vendor guidance is available.

References

Written by Nicholas Merritt

Nicholas Merritt is VP of Security Solutions at Halo Security. With more than 25 years across application security, vulnerability prioritization, and offensive security, he helps teams translate threat data into practical exposure validation and remediation focus. He authors Halo Threat Intelligence CVE advisories using Halo Surface Signal and H/A/L/O context to prioritize internet-facing risk.