CVE-2017-15043 : Security Advisory and Response

A security flaw has been discovered in Sierra Wireless AirLink routers, potentially allowing attackers to execute arbitrary code and gain complete control over affected systems.

Understanding CVE-2017-15043

What is CVE-2017-15043?

Sierra Wireless AirLink routers, including models GX400, GX440, ES440, LS300, GX450, ES450, RV50, RV50X, MP70, and MP70E, are vulnerable to a flaw that enables authenticated remote attackers to exploit inadequate input validation in HTTP requests, leading to potential code execution and system control.

The Impact of CVE-2017-15043

If exploited, attackers could execute arbitrary code and achieve full control over the targeted system, including the ability to issue commands with root privileges.

Technical Details of CVE-2017-15043

Vulnerability Description

The vulnerability arises from insufficient validation of user-controlled input in HTTP requests to the affected routers.

Affected Systems and Versions

Sierra Wireless AirLink GX400, GX440, ES440, LS300 routers with firmware versions prior to 4.4.5
GX450, ES450, RV50, RV50X, MP70, and MP70E routers with firmware versions prior to 4.9

Exploitation Mechanism

To exploit this vulnerability, attackers need authenticated access to the router and must send a carefully crafted HTTP request to the targeted system.

Mitigation and Prevention

Immediate Steps to Take

Update the firmware of affected routers to versions 4.4.5 or higher for GX400, GX440, ES440, LS300, and 4.9 or higher for GX450, ES450, RV50, RV50X, MP70, and MP70E.
Monitor network traffic for any suspicious activity.

Long-Term Security Practices

Implement strong password policies and regularly change login credentials.
Conduct regular security audits and vulnerability assessments.

Patching and Updates

Stay informed about security advisories from Sierra Wireless and apply patches promptly.