CVE-2021-22671 Explained : Impact and Mitigation

This article provides an overview of CVE-2021-22671, a vulnerability that exists in the SimpleLink Wi-Fi, MSP432, CC13XX, CC26XX, CC32XX, and CC3100 devices.

Understanding CVE-2021-22671

CVE-2021-22671 is caused by multiple integer overflow issues that occur when processing long domain names. These vulnerabilities could be exploited by an attacker to remotely execute code on affected devices.

What is CVE-2021-22671?

CVE-2021-22671 refers to multiple integer overflow vulnerabilities found in various SDK versions of SimpleLink Wi-Fi, MSP432, CC13XX, CC26XX, CC32XX, and CC3100 devices. These vulnerabilities can be leveraged by threat actors to execute malicious code remotely.

The Impact of CVE-2021-22671

The impact of CVE-2021-22671 is severe as it allows attackers to gain unauthorized access and execute arbitrary code on affected devices. This can lead to a complete compromise of system integrity and confidentiality.

Technical Details of CVE-2021-22671

CVE-2021-22671 stems from integer overflow issues in the processing of long domain names. The affected products and versions include MSP432E4 SDK: v4.20.00.12 and prior, CC32XX SDK v4.30.00.06 and prior, CC13X0 SDK versions prior to v4.10.03, CC13X2 and CC26XX SDK versions prior to v4.40.00, CC3200 SDK v1.5.0 and prior, CC3100 SDK v1.3.0 and prior.

Vulnerability Description

The vulnerability allows an attacker to exploit integer overflow in the domain name processing, leading to remote code execution on vulnerable devices.

Affected Systems and Versions

The affected systems include various SimpleLink Wi-Fi, MSP432, CC13XX, CC26XX, CC32XX, and CC3100 devices running specified SDK versions.

Exploitation Mechanism

Threat actors can exploit the integer overflow issues in how long domain names are handled to trigger remote code execution.

Mitigation and Prevention

It is crucial to take immediate steps to mitigate the risks posed by CVE-2021-22671 and implement long-term security measures.

Immediate Steps to Take

Update affected devices to the latest firmware or patches provided by the vendor. Network segmentation and access controls can also help minimize exposure.

Long-Term Security Practices

Regular security assessments, code review, and threat monitoring can enhance overall security posture and help detect vulnerabilities in advance.

Patching and Updates

Stay informed about security updates and patches released by the vendor. Promptly apply these updates to ensure that devices are protected against known vulnerabilities.