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critical advisory

X-Rite MA-T6 Remote Code Execution Vulnerability (CVE-2023-49899)

An unauthenticated remote attacker can exploit CVE-2023-49899 in X-Rite MA-T6 devices (versions prior to v2.33) to achieve arbitrary command execution by bypassing origin verification, leading to full compromise of the device.

CVE-2023-49899 is a critical vulnerability affecting X-Rite MA-T6 devices, specifically versions prior to v2.33. This flaw allows an unauthenticated remote attacker to execute arbitrary commands on the affected device. The root cause lies in the device's failure to correctly verify the origin of a communication channel, allowing malicious commands to be injected and executed without proper authentication or validation. This vulnerability has been assigned a CVSS v3.1 base score of 9.8 (Critical), highlighting its severe impact and ease of exploitation. Successful exploitation grants attackers complete control over the industrial device, posing significant risks to operational technology (OT) environments where these devices are deployed.

Attack Chain

  1. An unauthenticated remote attacker identifies an internet-exposed or network-accessible X-Rite MA-T6 device running a vulnerable firmware version (prior to v2.33).
  2. The attacker analyzes the communication protocol used by the device and identifies the mechanism susceptible to origin verification bypass.
  3. The attacker crafts a malicious communication packet or sequence designed to exploit the origin validation error (CWE-346).
  4. This crafted malicious communication contains embedded arbitrary commands intended for execution on the target device.
  5. The attacker sends the specially crafted communication to the vulnerable X-Rite MA-T6 device.
  6. Due to the insufficient origin verification, the device processes the malicious communication as legitimate.
  7. The embedded arbitrary commands are then executed with the privileges of the device's operating system.
  8. The attacker achieves unauthenticated remote code execution (RCE) on the X-Rite MA-T6 device, gaining full control.

Impact

Successful exploitation of CVE-2023-49899 leads to complete compromise of the affected X-Rite MA-T6 device. Given that the MA-T6 is an industrial measurement device, unauthorized command execution could result in data manipulation (e.g., inaccurate color measurements), disruption of critical industrial processes, or even physical damage if the device controls other machinery. Attackers could also use the compromised device as a pivot point to move laterally within an operational technology (OT) network, potentially impacting broader industrial control systems. The high CVSS score reflects the ease of exploitation (unauthenticated, network-adjacent) and the severe consequences (confidentiality, integrity, and availability all high).

Recommendation

  • Patch CVE-2023-49899 immediately by upgrading X-Rite MA-T6 devices to version v2.33 or later, as referenced in the NVD detail.
  • Implement strict network segmentation to limit the exposure of OT devices like the X-Rite MA-T6, even after patching.
  • Monitor network traffic for unusual communication patterns to and from X-Rite MA-T6 devices, especially external connections, as a layer of defense.