CVE-2021-35211 Explained : Impact and Mitigation

A critical vulnerability, CVE-2021-35211, was found in SolarWinds Serv-U affecting versions prior to 15.2.3 HF2. This flaw, discovered by Microsoft, allows remote code execution (RCE) via a Remote Memory Escape Vulnerability.

Understanding CVE-2021-35211

This section delves into the specifics of the CVE-2021-35211 vulnerability.

What is CVE-2021-35211?

Microsoft found a critical RCE security flaw in SolarWinds Serv-U that could allow threat actors to gain privileged access to the hosting machine.

The Impact of CVE-2021-35211

The severity of this vulnerability can result in high confidentiality, integrity, and availability impact with a CVSS base score of 9.

Technical Details of CVE-2021-35211

Explore the technical aspects related to CVE-2021-35211 below.

Vulnerability Description

The vulnerability in SolarWinds Serv-U enables threat actors to execute code remotely, potentially leading to machine takeover.

Affected Systems and Versions

SolarWinds Serv-U Managed File Transfer and Secure FTP versions before 15.2.3 HF2 for Windows are vulnerable to this exploit.

Exploitation Mechanism

The vulnerability can be exploited remotely without the need for user interaction, making it crucial to apply immediate security measures.

Mitigation and Prevention

Learn how to mitigate the risks associated with CVE-2021-35211.

Immediate Steps to Take

SolarWinds recommends disconnecting Serv-U Server from the internet until the necessary patches are applied.

Long-Term Security Practices

Implement robust security practices, network segmentation, and access controls to prevent such vulnerabilities.

Patching and Updates

SolarWinds has released a hotfix 15.2.3 HF2 to address CVE-2021-35211. Users are advised to upgrade to the latest hotfix promptly.