CVE-2021-42888 : Security Advisory and Response

TOTOLINK EX1200T V4.1.2cu.5215 contains a remote command injection vulnerability that can be exploited to control langType in the file global.so.

Understanding CVE-2021-42888

What is CVE-2021-42888?

The vulnerability in TOTOLINK EX1200T V4.1.2cu.5215 allows attackers to perform remote command injection by manipulating langType in the setLanguageCfg function of global.so.

The Impact of CVE-2021-42888

This vulnerability could enable unauthorized remote attackers to execute arbitrary commands on the affected system, potentially leading to unauthorized access or data manipulation.

Technical Details of CVE-2021-42888

Vulnerability Description

The vulnerability exists in the function setLanguageCfg of the file global.so in TOTOLINK EX1200T V4.1.2cu.5215, allowing attackers to control the langType parameter for malicious purposes.

Affected Systems and Versions

Product: TOTOLINK EX1200T V4.1.2cu.5215
Vendor: TOTOLINK
Version: V4.1.2cu.5215

Exploitation Mechanism

By exploiting this vulnerability, threat actors can inject and execute arbitrary commands by manipulating the langType parameter in the setLanguageCfg function.

Mitigation and Prevention

Immediate Steps to Take

Monitor vendor security advisories for patches or updates addressing this vulnerability.
Implement network segmentation to limit access to vulnerable systems.
Consider disabling remote access if not required for business operations.

Long-Term Security Practices

Regularly update and patch software to prevent known vulnerabilities.
Conduct security assessments and penetration testing to identify and address potential security gaps.
Educate system administrators and users about safe security practices.

Patching and Updates

Apply patches or updates released by TOTOLINK to remediate the vulnerability and improve the security posture of the affected systems.