CVE-2022-22724 is a high-severity vulnerability classified under CWE-400: Uncontrolled Resource Consumption. This vulnerability allows an attacker to cause a denial of service on Schneider Electric's Modicon M340 products, specifically on ports 80 (HTTP) and 502 (Modbus). By sending a large number of TCP RST or FIN packets to any open TCP port of the PLC, the attacker can exhaust resources, impacting the availability of the affected systems. As this vulnerability has a CVSS score of 7.5, it poses a substantial risk to organizations utilizing these products.
The potential for denial of service due to this vulnerability can severely disrupt operations, particularly in industrial environments where Modicon M340 CPUs are deployed. Organizations must recognize the urgency of addressing this issue as failure to do so could lead to significant operational downtime. Patching the affected products is crucial to mitigate the risk posed by this vulnerability.
Currently, there are no known exploits in the wild, but organizations should not become complacent. The high exploitability score indicates that this vulnerability could be easily leveraged by attackers. Therefore, organizations should prioritize patching immediately.
In light of these factors, organizations using Schneider Electric Modicon M340 products must take proactive measures to ensure their systems are updated and secured against this vulnerability.
Vulnerability Details
A CWE-400: Uncontrolled Resource Consumption vulnerability exists that could cause a denial of service on ports 80 (HTTP) and 502 (Modbus), when sending a large number of TCP RST or FIN packets to any open TCP port of the PLC. Affected Product: Modicon M340 CPUs: BMXP34 (All Versions).
The CVSS score for this vulnerability is 7.5, indicating a high level of severity. The high availability impact can lead to significant disruptions in service.
Technical Analysis
The root cause of this vulnerability is the PLC's inability to manage resource allocation effectively when faced with excessive TCP packets. The attack vector is network-based, indicating that an attacker can exploit this vulnerability remotely without needing physical access to the device.
The attack complexity is low, as no special conditions or privileges are required to exploit this vulnerability. Additionally, user interaction is not needed, making it an attractive target for potential attackers.
The availability impact is classified as high, meaning an attacker could render the service unavailable, leading to operational disruptions.
Risk & Impact Analysis
Risk to organizations includes the potential for significant operational disruption. The ability to send a large number of TCP packets to the PLC can overwhelm its resources, leading to denial of service. In an industrial context, this could halt production and lead to financial losses.
Given the high CVSS score and the lack of current known exploitation, organizations should assess their exposure risk and prioritize remediation. This vulnerability's impact could extend beyond immediate downtime, potentially affecting trust and compliance with operational standards.
Signal | Status |
|---|---|
Known Exploit | No |
Public PoC | No |
Actively Exploited | No |
Ransomware Use | No |
Affected Versions
The affected versions include all firmware versions for Modicon M340 CPUs: BMXP34, BMXP342000, BMXP342010, BMXP3420102, BMXP342030, and BMXP3420302.
Mitigation & Remediation
Organizations should prioritize patching the affected Modicon M340 firmware immediately. For more details on the patch, refer to the vendor's advisory.
Penetration testing can also help validate the effectiveness of the patch and identify any potential vulnerabilities that may have been overlooked.
Detection Guidance
Organizations should monitor logs for unusual patterns of traffic directed at the affected ports. Behavioral anomalies indicative of denial of service attempts should be tracked, and network signatures should be established to detect abnormal traffic.
AppSecure Threat Intelligence Insight
The long-term significance of CVE-2022-22724 lies in its demonstration of the vulnerabilities present in industrial control systems. This incident highlights the need for robust security measures in the deployment of such technologies.
Organizations are encouraged to re-evaluate their security posture in light of this vulnerability and consider engaging in regular security assessments, such as application security assessments and penetration testing to ensure that their systems are resilient against similar threats.
This vulnerability serves as a reminder of the critical importance of maintaining up-to-date systems and responds promptly to security advisories from vendors.
Red teaming exercises can also provide valuable insights into the security landscape and help organizations stay ahead of potential threats.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
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