CVE-2014-2346

Vulnerability

An improper input validation vulnerability (CWE-20) exists in the COPA-DATA zenon DNP3 NG driver (DNP3 master) versions 7.10 SP0 through 7.11 SP0 build 10238 and the zenon DNP3 Process Gateway (DNP3 outstation) versions 7.11 SP0 build 10238 and earlier [1][2]. The flaw occurs when the DNP3 driver processes specially crafted input over a serial line, leading to an infinite loop and process crash.

Exploitation

An attacker must have physical proximity to the affected device to send crafted input over a serial connection [1][2]. No authentication is required, and the attacker can trigger the denial-of-service condition by transmitting a malicious DNP3 message that the driver fails to validate properly.

Impact

Successful exploitation causes a denial-of-service (DoS) condition, resulting in an infinite loop that crashes the DNP3 driver process [1][2]. This closes communication connections and causes system instability, potentially disrupting SCADA operations in energy, water, and wastewater treatment environments.

Mitigation

COPA-DATA has produced an update that mitigates the vulnerability [1][2]. Affected users should contact COPA-DATA customer support for the fix and apply it according to the vendor's guidance. No workarounds are documented in the available references.