Severity: HIGH
Description: Fuji Electric V-Server Lite and Tellus Lite V-Simulator prior to v4.0.12.0 is vulnerable to an untrusted pointer dereference, which may allow an attacker to execute arbitrary code and cause the application to crash.
CVSS Score: 7.8
B
No data available.
No data available.
1. Risk Assessment
The vulnerability, an untrusted pointer dereference in Fuji Electric V-Server Lite and Tellus Lite V-Simulator versions prior to 4.0.12.0, presents a HIGH risk due to its potential for arbitrary code execution and application crashes. The CVSS score of 7.8 reflects this, indicating significant impact. The vulnerability requires user interaction, meaning an attacker needs to lure a user into triggering the dereference. However, once triggered, the attacker can gain high levels of control – compromising confidentiality, integrity, and availability of the system. This is particularly impactful in industrial control systems (ICS) environments where these simulators are often used for critical process monitoring and control. The EPSS score of 0.002230000 suggests the vulnerability is present in a fairly common set of installations. The business impact ranges from data loss and system downtime to potential disruption of industrial processes depending on the specific implementation and data handled by the affected software. The likelihood of exploitation is moderate, as it relies on user interaction, but the ease of exploitation, once interaction is achieved, is relatively high.
2. Potential Attack Scenarios
An attacker could craft a malicious file or input that, when loaded or processed by the vulnerable V-Server Lite or Tellus Lite V-Simulator, triggers the untrusted pointer dereference. For example, an attacker could create a specially crafted simulation file for the Tellus Lite V-Simulator. A user, perhaps an engineer, opens this file. The file contains data designed to cause the application to dereference a pointer to an unexpected memory location. This could allow the attacker to execute arbitrary code in the context of the simulator, potentially gaining control of the underlying system. The attacker could then install malware, steal sensitive configuration data, or disrupt the simulation process, leading to incorrect results or even control system errors. This is particularly dangerous if the simulator is integrated with live production systems. The attack vector is through a file or input provided by the user, requiring user interaction (opening the file).
3. Mitigation Recommendations
The primary mitigation is to update the V-Server Lite and Tellus Lite V-Simulator software to version 4.0.12.0 or later. Fuji Electric provides specific disk images for both TELLUS Lite and V-Server Lite. Immediate patching should be prioritized, especially for systems directly connected to critical infrastructure. Organizations should verify the integrity of the downloaded updates before installation. In addition to patching, consider implementing the following: restrict access to the simulator to authorized personnel, regularly scan for malware, and implement robust input validation to minimize the potential for malicious files to be loaded into the system. Refer to the CISA advisory (https://www.cisa.gov/uscert/ics/advisories/icsa-21-299-01) for detailed upgrade instructions and further guidance.
4. Executive Summary
Fuji Electric V-Server Lite and Tellus Lite V-Simulator software are vulnerable to a flaw that could allow an attacker to execute arbitrary code on affected systems. This means an attacker could potentially gain control of the simulator, steal data, or disrupt critical industrial processes. While the attack requires some user interaction, the potential impact is significant, affecting the confidentiality, integrity, and availability of the system. Updating to version 4.0.12.0 is the most effective mitigation, and should be prioritized, especially for systems integral to operations. This vulnerability poses a real threat to organizations using these Fuji Electric products, and prompt action is recommended to minimize the risk of disruption and data compromise. Failing to address this vulnerability could result in costly downtime, data loss, or even impact the reliability of industrial control systems.
Severity: HIGH
Description: Fuji Electric V-Server Lite and Tellus Lite V-Simulator prior to v4.0.12.0 is vulnerable to an access of uninitialized pointer, which may allow an attacker read from or write to unexpected memory locations, leading to a denial-of-service.
CVSS Score: 7.8
B
No data available.
No data available.
1. Risk Assessment
The vulnerability, CVE-2021-38409, is an access of uninitialized pointer within Fuji Electric V-Server Lite and Tellus Lite V-Simulator software prior to version 4.0.12.0. This means an attacker can potentially read from or write to unexpected memory locations. The CVSS score of 7.8 (HIGH) indicates a significant risk. While exploitation requires local access and user interaction, the potential impact is high across confidentiality, integrity, and availability. A successful exploit could allow an attacker to gain access to sensitive data, modify system state, or cause a denial-of-service, potentially disrupting critical industrial control system (ICS) processes. The EPSS score of 0.001310000 suggests a relatively low, but not insignificant, probability of exploitation in the wild. The business impact depends on how critical these simulators and servers are to the organization's operations, but a denial-of-service could lead to production downtime, inaccurate data, or even safety concerns in some scenarios. The likelihood of exploitation is moderate, as it requires a user to interact with the system, but the ease of exploitation is relatively high given the local access vector.
2. Potential Attack Scenarios
An attack scenario could unfold as follows: An attacker gains local access to a system running V-Server Lite or Tellus Lite V-Simulator, potentially through a compromised user account or physical access to the machine. The attacker then interacts with the software, triggering the uninitialized pointer access. This could occur by loading a specially crafted configuration file, or by manipulating input data within the simulator. The uninitialized pointer allows the attacker to read from or write to memory locations outside of the intended scope, potentially overwriting critical data structures or executing arbitrary code. This could lead to a denial-of-service by crashing the application, or potentially allow the attacker to gain further control over the system by altering key parameters or injecting malicious code. The attack vector is local, meaning the attacker needs to be on the same network or have direct access to the system. The attack process is relatively straightforward, requiring some understanding of the software and its inputs. The potential outcome is a denial-of-service, data corruption, or potentially full system compromise.
3. Mitigation Recommendations
The primary mitigation recommendation is to update the Fuji Electric V-Server Lite and Tellus Lite V-Simulator software to version 4.0.12.0 or later. This will address the uninitialized pointer vulnerability and prevent attackers from accessing unexpected memory locations. Immediate action should be taken to patch all affected systems, prioritizing those that are most critical to operations. Consider implementing network segmentation to limit the potential impact of a successful exploit. Monitor system logs for unusual activity that might indicate an attack is underway. Regularly review user access privileges to ensure only authorized personnel have local access to the systems. Refer to the CISA advisory (https://www.cisa.gov/uscert/ics/advisories/icsa-21-299-01) for detailed instructions on updating the software and verifying the patch. Consider vulnerability scanning to confirm the patch has been successfully applied.
4. Executive Summary
Fuji Electric V-Server Lite and Tellus Lite V-Simulator software contains a vulnerability that could allow an attacker to cause a denial-of-service or compromise system data. This vulnerability, rated HIGH severity, stems from an access of an uninitialized pointer, potentially allowing read/write access to unexpected memory locations. While exploitation requires local access and some user interaction, the potential impact on business operations is significant, especially if these systems are critical for industrial control processes. We recommend immediate patching to version 4.0.12.0 to mitigate the risk. Delaying the patch could result in production downtime, inaccurate data, or potentially safety issues. Addressing this vulnerability is a high priority to ensure the continued reliable operation of our industrial systems.
Severity: HIGH
Description: Fuji Electric V-Server Lite and Tellus Lite V-Simulator prior to v4.0.12.0 is vulnerable to a stack-based buffer overflow, which may allow an attacker to achieve code execution.
CVSS Score: 7.8
B
No data available.
No data available.
1. Risk Assessment
The vulnerability, CVE-2021-38413, is a stack-based buffer overflow in Fuji Electric V-Server Lite and Tellus Lite V-Simulator software prior to version 4.0.12.0. This is a HIGH severity vulnerability, indicated by a CVSS score of 7.8. The nature of a stack-based buffer overflow allows an attacker, with user interaction, to potentially overwrite portions of the program’s stack, leading to code execution. The likelihood of exploitation is moderate, as it requires user interaction, but the ease of exploitation is relatively high given the vulnerability type. The impact on confidentiality, integrity, and availability is all HIGH; successful exploitation could allow an attacker to steal sensitive data, modify system configurations, or even crash the affected system. These systems are frequently used in industrial control systems (ICS) environments, meaning a compromise could disrupt critical processes. The EPSS score of 0.003720000 indicates a relatively low but non-negligible probability of exploitation in the wild.
2. Potential Attack Scenarios
An attacker could leverage this vulnerability by crafting a malicious input that, when processed by the vulnerable software, overflows the stack buffer. A potential attack scenario unfolds as follows: An engineer is using the Tellus Lite V-Simulator to model a complex industrial process. The engineer opens a specifically crafted simulation file, containing a long string of data, designed to overflow the stack buffer. This file is provided to the engineer via email as a seemingly legitimate simulation project. When the V-Simulator attempts to process the simulation file, the buffer overflow occurs, allowing the attacker to inject and execute arbitrary code. The attacker then uses this code to gain control of the V-Simulator, potentially accessing connected ICS devices or stealing sensitive process data. This could lead to disruption of the industrial process, potential physical damage, or intellectual property theft.
3. Mitigation Recommendations
The primary mitigation recommendation is to update the Fuji Electric V-Server Lite and Tellus Lite V-Simulator software to version 4.0.12.0 or later. This patch addresses the stack-based buffer overflow vulnerability. The latest versions can be found on the Fuji Electric website or through their support channels. Immediate action should be taken to patch all affected systems, prioritizing those that are internet-facing or connected to critical ICS networks. Consider implementing input validation routines to limit the size of data accepted by the software, adding a layer of defense. Monitor network traffic for unusual activity following the patch to verify successful mitigation and detect any potential residual exploitation attempts. Refer to the CISA advisory for detailed information: https://www.cisa.gov/uscert/ics/advisories/icsa-21-299-01.
4. Executive Summary
Fuji Electric V-Server Lite and Tellus Lite V-Simulator software are vulnerable to a HIGH severity stack-based buffer overflow (CVE-2021-38413). This vulnerability allows an attacker, with some user interaction, to potentially take control of affected systems, compromising confidentiality, integrity, and availability. These systems are often used in critical industrial environments, meaning a successful attack could disrupt processes or even cause physical damage. The recommended action is to immediately update to version 4.0.12.0 or later. This update is critical to protect our industrial control systems from potential disruption and data theft. Delaying the patch increases the risk of a successful attack, potentially impacting production, safety, and our bottom line. Addressing this vulnerability should be prioritized to ensure the continued reliable operation of our critical infrastructure.
Severity: HIGH
Description: Fuji Electric V-Server Lite and Tellus Lite V-Simulator prior to v4.0.12.0 is vulnerable a heap-based buffer overflow when parsing a specially crafted project file, which may allow an attacker to execute arbitrary code.
CVSS Score: 7.8
B
No data available.
No data available.
1. Risk Assessment
The vulnerability, a heap-based buffer overflow in Fuji Electric V-Server Lite and Tellus Lite V-Simulator, presents a HIGH risk due to its potential to allow an attacker to execute arbitrary code. The CVSS score of 7.8 reflects this, indicating a significant impact on confidentiality, integrity, and availability. The vulnerability is triggered when parsing a specially crafted project file, suggesting a targeted, but not overly complex, attack vector. While local access is required (Attack Vector: Local), user interaction is only required to open the malicious file, making exploitation relatively easy in many operational environments. The business impact is potentially substantial. These simulators are often used in industrial control systems (ICS) environments, meaning a successful exploit could disrupt operations, potentially leading to production downtime, data loss, or even physical damage, depending on the specific implementation and control loops involved. The EPSS score of 0.003720000 suggests a moderate probability of exploitation given the number of installations.
2. Potential Attack Scenarios
An attacker could craft a malicious project file containing the buffer overflow exploit. This file could be delivered to a system operator via email, a shared network drive, or a USB drive. When the operator opens the project file within the V-Server Lite or Tellus Lite V-Simulator, the buffer overflow occurs. The attacker can then leverage the overflow to execute arbitrary code, potentially gaining control of the system. This control could allow the attacker to install malware, steal data, modify process parameters, or disrupt operations. For example, in a manufacturing setting, an attacker could modify parameters in the simulator to cause a machine to produce faulty parts, leading to increased scrap rate and production delays. A more severe outcome could involve manipulating the simulator to cause a physical malfunction, potentially damaging equipment or creating a safety hazard.
3. Mitigation Recommendations
The primary mitigation is to update the Fuji Electric V-Server Lite and Tellus Lite V-Simulator software to version 4.0.12.0 or later. This can be downloaded from the Fuji Electric website or through their standard update channels. Immediate patching is crucial to minimize the window of opportunity for attackers. Consider segmenting the network where these simulators reside to limit the potential impact of a successful exploit. Implement robust file validation procedures to scrutinize project files before opening them, especially if they originate from external sources. Regularly back up project files to ensure data can be restored in case of compromise. Monitor system logs for unusual activity, such as unexpected process creations or network connections, that may indicate an attack. Refer to CISA advisory ICSA-21-299-01 for additional details and guidance: https://www.cisa.gov/uscert/ics/advisories/icsa-21-299-01.
4. Executive Summary
Fuji Electric V-Server Lite and Tellus Lite V-Simulator software contain a vulnerability that could allow an attacker to execute arbitrary code by exploiting a buffer overflow when opening specially crafted project files. This vulnerability is considered HIGH risk, potentially leading to disruption of operations, data loss, or even physical damage, particularly in industrial control system environments. To protect our systems, we must prioritize updating to version 4.0.12.0 of both V-Server Lite and Tellus Lite V-Simulator. This update addresses the root cause of the vulnerability and mitigates the risk of attack. Prompt action is vital to minimize potential business impact and ensure the continued reliable operation of our critical infrastructure. This isn't just an IT issue; it could directly affect production and potentially impact safety.
Severity: HIGH
Description: Fuji Electric V-Server Lite and Tellus Lite V-Simulator prior to v4.0.12.0 is vulnerable to an out-of-bounds write, which can result in data corruption, a system crash, or code execution.
CVSS Score: 7.8
B
No data available.
No data available.
1. Risk Assessment
The vulnerability, CVE-2021-38419, is an out-of-bounds write vulnerability affecting Fuji Electric V-Server Lite and Tellus Lite V-Simulator versions prior to 4.0.12.0. This vulnerability has a CVSS v3.1 base score of 7.8 (HIGH), indicating a significant risk. The vector (CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H) shows that the attack vector is local, meaning the attacker needs some level of access to the system, but doesn't need to be authenticated. User interaction is required, meaning an attacker needs to coax a user into an action that triggers the vulnerability. The impact on confidentiality, integrity, and availability is all HIGH, meaning a successful exploit could lead to significant data compromise, data corruption, or system downtime. The EPSS score of 0.002230000 suggests the vulnerability is relatively rare but impactful when it occurs. Given these factors, the risk is considerable, particularly within industrial control systems (ICS) environments where these simulators are often deployed, as downtime or data corruption can disrupt critical processes.
2. Potential Attack Scenarios
An attacker could leverage this vulnerability through a specially crafted input file loaded into the Tellus Lite V-Simulator or V-Server Lite. The scenario unfolds as follows: an attacker identifies a user who regularly uses the simulator/server. They create a malicious input file designed to trigger the out-of-bounds write when processed by the software. The attacker then social engineers the user into opening or loading the malicious input file. Upon processing the file, the out-of-bounds write occurs, potentially overwriting critical system memory. This could result in a system crash, data corruption within the simulator/server, or even code execution allowing the attacker to gain control of the underlying system. The attacker could then exfiltrate sensitive data, modify configurations, or disrupt the simulation/server’s operation. This scenario is especially dangerous in an ICS environment where the simulator/server is connected to physical processes, potentially leading to physical impacts.
3. Mitigation Recommendations
The primary mitigation for CVE-2021-38419 is to upgrade to version 4.0.12.0 or later of both V-Server Lite and Tellus Lite V-Simulator. Fuji Electric provides specific disk versions for each: TELLUS Lite software: Version 4.0.12.0 Disk1 & Disk2, and V-Server Lite software: Version 4.0.12.0 Disk1 & Disk2. Patching should be prioritized, particularly for systems exposed to untrusted input sources. As an interim measure, restrict access to the simulator/server to trusted users and validate input files before processing, if possible. Monitor system logs for unusual activity that could indicate exploitation. Regularly backup the simulator/server to facilitate recovery in the event of data corruption or a system crash. Refer to the CISA advisory for detailed information: https://www.cisa.gov/uscert/ics/advisories/icsa-21-299-01.
4. Executive Summary
CVE-2021-38419 is a HIGH severity vulnerability affecting Fuji Electric V-Server Lite and Tellus Lite V-Simulator, potentially allowing attackers to corrupt data, crash the system, or even execute code. This vulnerability impacts the confidentiality, integrity, and availability of the affected systems and is particularly concerning if these simulators are used in critical industrial control systems. The vulnerability requires user interaction to exploit but can have a significant impact. The recommended mitigation is to upgrade to version 4.0.12.0, a relatively straightforward process. Addressing this vulnerability is crucial to prevent potential disruptions to operations and protect sensitive data. Prompt patching will minimize the risk of exploitation and ensure continued reliable operation of these important systems.
Severity: HIGH
Description: Fuji Electric V-Server Lite and Tellus Lite V-Simulator prior to v4.0.12.0 is vulnerable to an out-of-bounds read, which may allow an attacker to read sensitive information from other memory locations or cause a crash.
CVSS Score: 7.8
B
No data available.
No data available.
1. Risk Assessment
The vulnerability CVE-2021-38421 is an out-of-bounds read vulnerability present in Fuji Electric V-Server Lite and Tellus Lite V-Simulator versions prior to 4.0.12.0. This means an attacker can potentially read data from memory locations outside the intended boundaries, leading to information disclosure, a system crash, or potentially even code execution. The CVSS score of 7.8 (HIGH) indicates a significant risk. The vulnerability requires local access and user interaction, meaning an attacker needs to be able to interact with the system, potentially through a malicious file or input. The impact is high across all three areas: confidentiality (sensitive information can be stolen), integrity (data can be corrupted), and availability (system can crash). Given these industrial control systems are used in critical infrastructure, a successful exploit could impact operational technology (OT) environments, leading to process disruptions or even safety incidents. The EPSS score of 0.001310000 suggests a relatively low but non-negligible probability of exploitation, given the prevalence of the software in affected environments.
2. Potential Attack Scenarios
An attacker with local access to a system running a vulnerable version of V-Server Lite or Tellus Lite V-Simulator could craft a specific input to trigger the out-of-bounds read. For example, a malicious configuration file loaded into the simulator could be designed to overflow a buffer, allowing the attacker to read sensitive data from adjacent memory locations. The attacker could then use this data, such as process variables or configuration details, to understand the system’s state or manipulate its behavior. A potential outcome is the disclosure of proprietary process control data, allowing an attacker to gain a better understanding of the controlled process and potentially disrupt operations. Another outcome could be a denial-of-service if the out-of-bounds read causes a critical system crash. The attacker might leverage this to disrupt the process controlled by the V-Simulator or V-Server Lite, impacting production or other critical functions.
3. Mitigation Recommendations
The primary mitigation for CVE-2021-38421 is to update the V-Server Lite and Tellus Lite V-Simulator software to version 4.0.12.0 or later. Fuji Electric provides specific disk images for both products; ensure both Disk1 and Disk2 are updated for each. This should be prioritized as a high-impact vulnerability affecting OT environments. Implement a change management process to ensure the update is tested in a non-production environment before being deployed to production systems. Consider network segmentation to limit the attack surface and reduce the impact of a successful exploit. Regularly review system logs for anomalies that might indicate an exploitation attempt. The CISA advisory provides further details and context: https://www.cisa.gov/uscert/ics/advisories/icsa-21-299-01.
4. Executive Summary
Fuji Electric V-Server Lite and Tellus Lite V-Simulator software contains a vulnerability that could allow an attacker to read sensitive information or crash the system. This vulnerability, designated CVE-2021-38421, is rated HIGH in severity. While exploitation requires local access and user interaction, the potential impact on confidentiality, integrity, and availability is significant, especially within critical industrial control systems. The primary mitigation is to update to version 4.0.12.0. Prompt patching is crucial to protect operational technology environments from potential disruption, data theft, and potential safety impacts. Delaying patching could allow attackers to gain valuable insight into our processes and potentially disrupt operations. We recommend prioritizing this update as part of our regular security maintenance schedule.