A vulnerability exists in the command handling of the IEC 61850 communication stack included in the product revisions listed as affected in this CVE. An attacker with access to IEC 61850 networks could exploit the vulnerability by using a specially crafted 61850 packet, forcing the communication interfaces of the PM 877, CI850 and CI868 modules into fault mode or causing unavailability of the S+ Operations 61850 connectivity, resulting in a denial-of-service situation. The System 800xA IEC61850 Connect is not affected. Note: This vulnerability does not impact on the overall availability and functionality of the S+ Operations node, only the 61850 communication function.
This issue affects several versions of the AC800M (System 800xA): from 6.0.0x through 6.0.0303.0, from 6.1.0x through 6.1.0031.0, from 6.1.1x through 6.1.1004.0, from 6.1.1x through 6.1.1202.0, from 6.2.0x through 6.2.0006.0; Symphony Plus SD Series: A_0, A_1, A_2.003, A_3.005, A_4.001, B_0.005; Symphony Plus MR (Melody Rack): from 3.10 through 3.52; S+ Operations: 2.1, 2.2, 2.3, 3.3.
This vulnerability has been assigned a CVSS score of 7.1, indicating a high severity level. The attack vector is classified as adjacent, with low complexity. Attackers do not require any privileges or user interaction to exploit this vulnerability. The impact on availability is significant, which could lead to service disruptions.
Risk to organizations includes potential denial-of-service situations, affecting critical operations. Organizations should prioritize patching immediately to mitigate these risks.
Vulnerability Details
The vulnerability in question is categorized under CWE-1284. The command handling flaws in the IEC 61850 communication stack can be exploited through specially crafted packets, leading to faults in communication interfaces.
Technical Analysis
The root cause of this vulnerability arises from inadequate validation of incoming packets in the IEC 61850 communication stack. The attack vector is local to the IEC 61850 networks, and the complexity of the attack is low. No privileges are required for exploitation, nor is user interaction necessary. The impact on availability is high, potentially causing critical services to become unavailable.
Risk & Impact Analysis
Real-world deployment risks associated with this vulnerability are significant. Organizations that utilize the affected products must understand the potential for disruption in service, particularly in environments reliant on the IEC 61850 communication functions. The urgency of addressing this vulnerability is underscored by its high CVSS score and the potential for denial-of-service attacks.
Exploitation Status
Signal | Status |
|---|---|
Known Exploit | No |
Public PoC | No |
Actively Exploited | No |
Ransomware Use | No |
Affected Versions
The following versions are affected: AC800M (System 800xA): from 6.0.0x through 6.0.0303.0, from 6.1.0x through 6.1.0031.0, from 6.1.1x through 6.1.1004.0, from 6.1.1x through 6.1.1202.0, from 6.2.0x through 6.2.0006.0; Symphony Plus SD Series: A_0, A_1, A_2.003, A_3.005, A_4.001, B_0.005; Symphony Plus MR (Melody Rack): from 3.10 through 3.52; S+ Operations: 2.1, 2.2, 2.3, 3.3.
Mitigation & Remediation
Organizations are encouraged to apply patches or updates as soon as they become available. In the absence of a patch, consider implementing network segmentation to limit access to vulnerable components. Regular monitoring of communication traffic may help detect abnormal patterns indicative of attempts to exploit this vulnerability.
Detection Guidance
Monitoring for unusual traffic patterns in IEC 61850 networks can help identify potential exploitation attempts. Log analysis focusing on packet structures and communication interfaces may reveal attempts to exploit this vulnerability.
AppSecure Threat Intelligence Insight
This vulnerability highlights the ongoing risks associated with industrial control systems and the importance of maintaining robust security measures for networked environments. The potential for denial-of-service attacks in critical infrastructure underlines the need for proactive security assessments. Organizations should consider adopting comprehensive application security assessments to identify and remediate such vulnerabilities in their systems.
Furthermore, continuous monitoring and regular updates to security protocols are essential in defending against emerging threats. Security teams should remain vigilant and explore continuous penetration testing services to ensure their defenses remain effective against potential exploits.
Lastly, organizations should review their incident response plans to ensure preparedness for any potential denial-of-service incidents that could arise from this vulnerability.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
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