CVE-2017-6884 is a vulnerability in Zyxel Emg2926 Firmware
Published on April 6, 2017
A command injection vulnerability was discovered on the Zyxel EMG2926 home router with firmware V1.00(AAQT.4)b8. The vulnerability is located in the diagnostic tools, specifically the nslookup function. A malicious user may exploit numerous vectors to execute arbitrary commands on the router, such as the ping_ip parameter to the expert/maintenance/diagnostic/nslookup URI.
Known Exploited Vulnerability
This Zyxel EMG2926 Routers Command Injection Vulnerability is part of CISA's list of Known Exploited Vulnerabilities. Zyxel EMG2926 routers contain a command injection vulnerability located in the diagnostic tools, specifically the nslookup function. A malicious user may exploit numerous vectors to execute malicious commands on the router, such as the ping_ip parameter to the expert/maintenance/diagnostic/nslookup URI.
The following remediation steps are recommended / required by October 9, 2023: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
Vulnerability Analysis
CVE-2017-6884 is exploitable with network access, and requires small amount of user privileges. This vulnerability is considered to have a low attack complexity. It has an exploitability score of 2.8 out of four. The potential impact of an exploit of this vulnerability is considered to be very high.
What is a Shell injection Vulnerability?
The software constructs all or part of an OS command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended OS command when it is sent to a downstream component.
CVE-2017-6884 has been classified to as a Shell injection vulnerability or weakness.
Products Associated with CVE-2017-6884
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What versions of Emg2926 Firmware are vulnerable to CVE-2017-6884?
Each of the following must match for the vulnerability to exist.