CVE-2020-21699 : Exploit Details and Defense Strategies

Tengine 2.2.2 web server developed in the Nginx version from 0.5.6 thru 1.13.2 is vulnerable to an integer overflow vulnerability in the nginx range filter module.

Understanding CVE-2020-21699

This CVE identifies a specific vulnerability in the Tengine web server.

What is CVE-2020-21699?

The vulnerability in the Nginx range filter module of Tengine 2.2.2 can lead to the exposure of potentially sensitive information due to an integer overflow triggered by specially crafted requests.

The Impact of CVE-2020-21699

The exploitation of this vulnerability can result in the leakage of sensitive data, potentially compromising the security and confidentiality of the affected systems.

Technical Details of CVE-2020-21699

This section provides technical insights into the CVE.

Vulnerability Description

The vulnerability is an integer overflow issue in the nginx range filter module of Tengine 2.2.2.

Affected Systems and Versions

Vendor: n/a
Product: n/a
Versions: Nginx versions from 0.5.6 thru 1.13.2

Exploitation Mechanism

The vulnerability is exploited through specially crafted requests that trigger the integer overflow in the nginx range filter module.

Mitigation and Prevention

Protective measures to address CVE-2020-21699.

Immediate Steps to Take

Apply security patches provided by the vendor promptly.
Monitor and filter incoming requests to detect and block potentially malicious traffic.
Implement network segmentation to limit the impact of a successful exploit.

Long-Term Security Practices

Regularly update and patch all software components to address known vulnerabilities.
Conduct security assessments and penetration testing to identify and remediate weaknesses proactively.
Educate system administrators and users about safe computing practices.

Patching and Updates

Ensure timely installation of security patches and updates to mitigate the risk associated with CVE-2020-21699.