CVE-2014-9369 in SPC4000
Summary
by MITRE
Siemens SPC controllers SPC4000, SPC5000, and SPC6000 before 3.6.0 allow remote attackers to cause a denial of service (device restart) via crafted packets.
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Analysis
by VulDB Data Team • 05/17/2022
The vulnerability identified as CVE-2014-9369 affects Siemens SPC controllers including models SPC4000, SPC5000, and SPC6000 operating on firmware versions prior to 3.6.0. These industrial control devices are commonly deployed in critical infrastructure environments where reliability and continuous operation are paramount. The flaw represents a significant security concern as it enables remote attackers to induce a denial of service condition that results in device restarts, potentially disrupting industrial processes and operations.
This vulnerability stems from insufficient input validation within the network protocol handling mechanisms of these controllers. Attackers can craft specially formatted network packets that exploit weaknesses in the device's packet processing routines, leading to unexpected behavior and subsequent device restarts. The attack vector is particularly concerning because it requires no authentication credentials and can be executed remotely over the network, making it accessible to adversaries with minimal privileges.
The operational impact of this vulnerability extends beyond simple service interruption. Industrial control systems that rely on continuous operation may experience cascading failures when these controllers restart unexpectedly. The restart process can interrupt critical processes, potentially leading to production halts, safety system degradation, or even hazardous conditions in environments where these controllers manage industrial processes. Organizations operating these devices face significant risk of operational disruption and potential financial losses due to unplanned downtime.
From a cybersecurity perspective, this vulnerability aligns with CWE-129, which addresses improper validation of input boundaries, and represents a classic example of a buffer overflow or input validation flaw that can be exploited for denial of service attacks. The ATT&CK framework categorizes this under the T1499.004 technique for network denial of service, where adversaries leverage vulnerabilities to disrupt network services. The remote exploitation capability makes this particularly dangerous in industrial environments where network connectivity is often required for monitoring and control purposes.
Mitigation strategies should prioritize immediate firmware updates to version 3.6.0 or later, which contain patches addressing the input validation deficiencies. Network segmentation and access controls should be implemented to limit unauthorized network access to these devices. Additionally, organizations should deploy intrusion detection systems capable of identifying suspicious packet patterns and establish monitoring procedures to detect unauthorized access attempts. Regular security assessments and vulnerability scanning should be conducted to identify similar weaknesses in other industrial control system components. The implementation of network access control lists and firewall rules can further reduce the attack surface by restricting communication to authorized endpoints only.