CVE-2021-30233 : Security Advisory and Response

This article provides insights into CVE-2021-30233, a vulnerability found in the China Mobile An Lianbao WF-1 router 1.0.1, allowing remote attackers to execute arbitrary commands.

Understanding CVE-2021-30233

This section delves into the details surrounding CVE-2021-30233.

What is CVE-2021-30233?

The api/ZRIptv/setIptvInfo interface in China Mobile An Lianbao WF-1 router 1.0.1 allows remote attackers to execute arbitrary commands via shell metacharacters in the iptv_vlan parameter.

The Impact of CVE-2021-30233

The vulnerability enables malicious actors to remotely execute unauthorized commands on the affected router, potentially leading to unauthorized access or control.

Technical Details of CVE-2021-30233

Here we explore the technical aspects of CVE-2021-30233.

Vulnerability Description

The flaw resides in the handling of input within the iptv_vlan parameter, allowing for the injection of arbitrary commands by threat actors.

Affected Systems and Versions

The vulnerability affects the China Mobile An Lianbao WF-1 router version 1.0.1.

Exploitation Mechanism

Remote attackers can exploit this vulnerability by inserting malicious shell metacharacters into the iptv_vlan parameter, granting them unauthorized command execution capabilities.

Mitigation and Prevention

This section outlines steps to mitigate the risks posed by CVE-2021-30233.

Immediate Steps to Take

Immediately restrict access to the vulnerable api/ZRIptv/setIptvInfo interface, and apply vendor-supplied patches or workarounds to address the issue.

Long-Term Security Practices

Ensure regular security assessments and audits are conducted to identify and remediate potential vulnerabilities in network devices.

Patching and Updates

Frequently monitor for security advisories from China Mobile and apply updates promptly to safeguard against known vulnerabilities.