CVE-2018-4063 is a high-severity vulnerability that allows remote code execution in the Sierra Wireless AirLink ALEOS product. This vulnerability is specifically found in the upload.cgi functionality of the AirLink ES450 device running firmware version 4.9.3. An exploitable condition exists whereby an attacker can send a specially crafted HTTP request that uploads malicious files to the web server, effectively compromising the device. With a CVSS score of 8.8, it is critical for organizations utilizing this device to understand the implications of this vulnerability and to act swiftly.
Risk to organizations includes potential unauthorized access and the ability to execute arbitrary code remotely. Given that this vulnerability affects devices that may be used in sensitive environments, it is imperative that organizations prioritize patching and remediation efforts. The potential impacts are significant, including loss of confidentiality, integrity, and availability of the affected systems.
This vulnerability has been acknowledged and included in the CISA Known Exploited Vulnerabilities Catalog, indicating that it is actively being targeted in the wild. Organizations should assess their exposure and implement the necessary mitigations as outlined by the vendor. Failure to address this vulnerability could lead to severe operational disruptions and security breaches.
Organizations should prioritize patching immediately. The vendor has provided guidance on how to mitigate the risks associated with this vulnerability, and users are strongly encouraged to follow these instructions.
Vulnerability Details
This vulnerability allows remote code execution through the upload.cgi functionality in the Sierra Wireless AirLink ES450 device. The vulnerability stems from improper validation of uploaded files, which allows an attacker to upload malicious executable code. The CVSS score of 8.8 signifies a high level of risk, indicating that the attack vector is network-based with low complexity and requires low privileges for exploitation.
The affected product is the Sierra Wireless AirLink ALEOS, specifically version 4.9.3, with the vulnerability published on May 6, 2019. The weakness is classified as CWE-434, which pertains to unrestricted file uploads that can lead to arbitrary code execution.
Technical Analysis
The root cause of CVE-2018-4063 is the lack of proper validation of uploaded files in the upload.cgi functionality. This allows an attacker to craft an HTTP request that bypasses security mechanisms, resulting in the upload of malicious files to the web server. The attack vector is network-based, meaning that the vulnerability can be exploited remotely. The complexity of the attack is low, as it requires only basic authentication privileges.
No user interaction is required for exploitation, making it easier for attackers to compromise systems. The impact on confidentiality, integrity, and availability is rated high, as unauthorized code execution can lead to complete control over the affected device.
Risk & Impact Analysis
The real-world risk associated with CVE-2018-4063 is substantial, especially for organizations utilizing Sierra Wireless AirLink ALEOS in critical infrastructure or sensitive environments. The potential for unauthorized access, data breaches, and operational disruptions makes this vulnerability particularly concerning. The blast radius is significant, as multiple devices could be affected if not remediated promptly.
Given the CVSS score of 8.8 and its inclusion in the KEV catalog, organizations must act urgently to address this vulnerability. The assessment indicates a high likelihood of exploitation, underscoring the need for immediate remediation efforts.
Signal | Status |
|---|---|
Known Exploit | No |
Public PoC | No |
Actively Exploited | Yes |
Ransomware Use | No |
Affected Versions
All versions of Sierra Wireless ALEOS prior to 4.9.4 are affected by this vulnerability. Users of affected versions are encouraged to upgrade to the latest patched version to mitigate the risk associated with this vulnerability.
Mitigation & Remediation
Organizations should apply mitigations per vendor instructions and follow applicable guidance from the US Government. If mitigations are unavailable, organizations should consider discontinuing the use of the affected product.
For further assistance, organizations can engage in penetration testing services to identify vulnerabilities in their systems.
Detection Guidance
Organizations should monitor logs for unusual file uploads, review authentication logs for unauthorized access attempts, and track system changes that could indicate exploitation of this vulnerability.
AppSecure Threat Intelligence Insight
The long-term significance of CVE-2018-4063 lies in its potential to expose critical infrastructure to significant risk. This vulnerability highlights ongoing challenges in securing industrial routers and the need for continuous vigilance. Security teams should learn from this incident to enhance their security posture against similar threats.
For organizations looking to bolster their defenses, we recommend exploring penetration testing methodology and implementing comprehensive security assessments.
Additionally, understanding the landscape of vulnerabilities through vulnerability management programs will provide insights into emerging threats and necessary preventive measures.
Lastly, organizations can benefit from engaging in API penetration testing to uncover any additional vulnerabilities in their systems.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
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