Step Up Your Open Source Security Game

Oct 13, 2025 by wbrum.org 101 views

Introduction

In the ever-evolving landscape of software development, security vulnerabilities can have a significant impact on the integrity and reliability of applications. The detection of CVE-2025-22870, a medium-severity vulnerability, in multiple libraries has raised concerns among developers and security experts. In this article, we will delve into the details of this vulnerability, its impact, and the suggested fix.

Vulnerable Libraries

The CVE-2025-22870 vulnerability has been detected in the following libraries:

These libraries are part of the Go supplementary network libraries, which provide a set of network-related functions and utilities.

Dependency Hierarchy

The dependency hierarchy for each of the vulnerable libraries is as follows:

github.com/golang/net-v0.0.0-20190603091049-60506f45cf65
- Root Library: github.com/hyperledger/fabric-protos-go-v0.0.0-20200422100619-316dc6798e96
  - github.com/gRPC/grpc-go-v1.23.0
    - github.com/golang/net-v0.0.0-20190603091049-60506f45cf65 (Vulnerable Library)
github.com/golang/net-v0.1.0
- Root Library: github.com/hyperledger/fabric-v1.4.1
  - github.com/golang/net-v0.1.0 (Vulnerable Library)
github.com/golang/net-v0.0.0-20190724013045-ca1201d0de80
- Root Library: github.com/hyperledger/fabric-sdk-go-v1.0.0-beta3
  - github.com/golang/net-v0.0.0-20190724013045-ca1201d0de80 (Vulnerable Library)

Vulnerability Details

The CVE-2025-22870 vulnerability is a proxy bypass vulnerability using IPv6 zone IDs. In the Go net/http, x/net/proxy, and x/net/http/httpproxy packages, there is a bug that improperly treats an IPv6 zone ID as a hostname component. This can lead to incorrect matching of hosts against proxy patterns, resulting in proxy bypass.

For example, when the NO_PROXY environment variable is set to "*.example.com", a request to "[::1%25.example.com]:80" would incorrectly match and not be proxied.

This vulnerability affects versions before 1.23.7 and 1.24.x before 1.24.1.

CVSS 3 Score Details

The CVSS 3 score for this vulnerability is 5.5, with the following metrics:

Base Score Metrics
- Exploitability Metrics
  - Attack Vector: Local
  - Attack Complexity: Low
  - Privileges Required: None
  - User Interaction: Required
  - Scope: Unchanged
- Impact Metrics
  - Confidentiality Impact: None
  - Integrity Impact: None
  - Availability Impact: High

Suggested Fix

The suggested fix for this vulnerability is to upgrade the version of the affected libraries to the latest version, which is go1.23.7.

Conclusion

The detection of CVE-2025-22870 in multiple libraries highlights the importance of regular security audits and vulnerability assessments. Developers and security experts must stay vigilant and take proactive measures to ensure the security and integrity of their applications.

By upgrading the affected libraries to the latest version, developers can mitigate the risk of this vulnerability and ensure the security of their applications.

Step Up Your Open Source Security Game

To learn more about how to protect your open-source software and stay ahead of security threats, visit Mend.

References

CVE-2025-22870
Go net/http, x/net/proxy, x/net/http/httpproxy
CVSS 3 Calculator
CVE-2025-22870 (Medium) Detected in Multiple Libraries: Q&A ===========================================================

Introduction

In our previous article, we discussed the detection of CVE-2025-22870, a medium-severity vulnerability, in multiple libraries. In this article, we will address some of the frequently asked questions (FAQs) related to this vulnerability.

Q: What is CVE-2025-22870?

A: CVE-2025-22870 is a medium-severity vulnerability detected in multiple libraries, including github.com/golang/net-v0.0.0-20190603091049-60506f45cf65, github.com/golang/net-v0.1.0, and github.com/golang/net-v0.0.0-20190724013045-ca1201d0de80.

Q: What is the impact of this vulnerability?

A: The CVE-2025-22870 vulnerability is a proxy bypass vulnerability using IPv6 zone IDs. This can lead to incorrect matching of hosts against proxy patterns, resulting in proxy bypass.

Q: Which versions of the affected libraries are vulnerable?

A: The CVE-2025-22870 vulnerability affects versions before 1.23.7 and 1.24.x before 1.24.1.

Q: How can I determine if my application is affected by this vulnerability?

A: To determine if your application is affected by this vulnerability, you can use the following steps:

Check the dependency hierarchy of your application to see if it uses any of the affected libraries.
Verify the version of the affected libraries in your application to ensure it is not vulnerable.
Use a vulnerability scanner or a tool like Mend to scan your application for vulnerabilities.

Q: What is the suggested fix for this vulnerability?

A: The suggested fix for this vulnerability is to upgrade the version of the affected libraries to the latest version, which is go1.23.7.

Q: How can I prevent similar vulnerabilities in the future?

A: To prevent similar vulnerabilities in the future, you can follow these best practices:

Regularly update your dependencies to ensure you have the latest versions.
Use a vulnerability scanner or a tool like Mend to scan your application for vulnerabilities.
Implement a secure coding practice and follow secure coding guidelines.
Conduct regular security audits and vulnerability assessments.

Q: What is the CVSS 3 score for this vulnerability?

A: The CVSS 3 score for this vulnerability is 5.5, with the following metrics:

Base Score Metrics
- Exploitability Metrics
  - Attack Vector: Local
  - Attack Complexity: Low
  - Privileges Required: None
  - User Interaction: Required
  - Scope: Unchanged
- Impact Metrics
  - Confidentiality Impact: None
  - Integrity Impact: None
  - Availability Impact: High

Conclusion

The detection of CVE-2025-22870 in multiple libraries highlights the importance of regular security audits and vulnerability assessments. By following best practices and staying vigilant, developers can mitigate the risk of this vulnerability and ensure the security of their applications.

Step Up Your Open Source Security Game

To learn more about how to protect your open-source software and stay ahead of security threats, visit Mend.