A command injection vulnerability has been discovered in several LB-LINK products, including the BL-AC1900, BL-WR9000, BL-X26, and BL-LTE300 firmware versions. This vulnerability allows attackers to exploit the mac, time1, and time2 parameters at the endpoint /goform/set_LimitClient_cfg.
This vulnerability is classified as critical with a CVSS score of 9.8, indicating an alarming level of risk to organizations. Attackers may leverage this vulnerability to execute arbitrary commands on the affected devices, potentially compromising the confidentiality, integrity, and availability of the systems.
Given the nature of the vulnerability and its potential impact, organizations utilizing these LB-LINK devices should prioritize patching immediately.
The vulnerability was published on March 26, 2023, and is reflected in various security advisories discussing its implications. Users should remain vigilant and monitor for any related security updates.
Vulnerability Details
The LB-LINK firmware versions affected include BL-AC1900_2.0 v1.0.1, BL-WR9000 v2.4.9, BL-X26 v1.2.5, and BL-LTE300 v1.0.8. The vulnerability type is classified under CWE-77, indicating command injection risks.
Due to the CVSS score of 9.8, this vulnerability poses a critical risk, warranting immediate attention from organizations operating these devices.
Technical Analysis
The root cause of this vulnerability lies in improper validation of user-supplied input via the mac, time1, and time2 parameters. This flaw enables attackers to manipulate the command execution context within the firmware.
The attack vector is network-based, with low attack complexity, requiring no privileges or user interaction. This means that an unauthenticated attacker can exploit the vulnerability remotely, leading to high impacts on confidentiality, integrity, and availability.
Risk & Impact Analysis
The risk to organizations includes potential unauthorized access to sensitive information and complete control over affected devices. The blast radius is significant, as compromising a single device can lead to broader network vulnerabilities.
Given the critical severity, organizations should assess their deployment of LB-LINK devices and implement necessary remediation steps promptly.
Exploitation Status
Signal | Status |
|---|---|
Known Exploit | No |
Public PoC | No |
Actively Exploited | No |
Ransomware Use | No |
Affected Versions
The affected versions include:
- LB-LINK BL-AC1900 Firmware v1.0.1 - LB-LINK BL-WR9000 Firmware v2.4.9 - LB-LINK BL-X26 Firmware v1.2.5 - LB-LINK BL-LTE300 Firmware v1.0.8
Mitigation & Remediation
Organizations should patch their LB-LINK devices to the latest firmware versions as soon as they become available. In the meantime, network controls should be implemented to limit access to the vulnerable endpoints. For further assistance, organizations can engage in penetration testing services to assess their security posture.
Detection Guidance
Organizations should monitor logs for any unusual command execution attempts or unauthorized access attempts to the vulnerable endpoints. Behavioral anomalies that deviate from typical usage patterns should be flagged for further investigation.
AppSecure Threat Intelligence Insight
This vulnerability highlights the importance of robust input validation mechanisms within firmware to defend against command injection attacks. Organizations must remain vigilant regarding their devices' firmware updates to mitigate such vulnerabilities proactively.
For more insights on enhancing application security, consider reviewing our penetration testing methodology and our guide on vulnerability management programs to ensure comprehensive security coverage.
Additionally, organizations should explore our API penetration testing guide for best practices in securing application interfaces.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
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