CVE-2021-23718 : Security Advisory and Response

Server-side Request Forgery (SSRF) vulnerability in ssrf-agent before version 1.0.5 allows attackers to manipulate IP requests. Here's what you should know.

Understanding CVE-2021-23718

This CVE refers to a vulnerability in ssrf-agent that enables SSRF attacks due to inadequate IP validation.

What is CVE-2021-23718?

The package ssrf-agent before 1.0.5 is susceptible to SSRF through the defaultIpChecker function, failing to validate requested private IPs.

The Impact of CVE-2021-23718

With a CVSS base score of 6.5 (Medium Severity), this vulnerability poses a high risk to confidentiality with low attack complexity over the network.

Technical Details of CVE-2021-23718

Let's delve deeper into the technical aspects of this security flaw.

Vulnerability Description

The vulnerability in ssrf-agent allows attackers to exploit SSRF by bypassing IP validation mechanisms.

Affected Systems and Versions

Versions of ssrf-agent older than 1.0.5 are impacted by this vulnerability.

Exploitation Mechanism

Attackers can leverage this vulnerability to trigger SSRF attacks by sending malicious requests to the affected server.

Mitigation and Prevention

Protect your systems from CVE-2021-23718 with these security measures.

Immediate Steps to Take

Update ssrf-agent to version 1.0.5 or higher to mitigate the SSRF vulnerability and enhance IP validation.

Long-Term Security Practices

Implement network-level controls, monitor outbound traffic, and conduct regular security audits to detect and prevent SSRF attacks.

Patching and Updates

Stay informed about security patches for ssrf-agent and ensure timely application to address known vulnerabilities.