Horizon Alert
Summary of the vulnerability and why it matters
An issue in the Axios HTTP client could allow an attacker to bypass network restrictions and reach internal systems. This is a significant concern because it impacts how applications handle network requests, potentially exposing sensitive internal resources.
- Affects Node.js applications.
- Allows bypassing NO_PROXY settings.
- Potentially exposes internal services.
Attack Path
How an attacker could exploit the issue
An attacker can exploit this by tricking an application that uses a vulnerable version of Axios into making a request to a malicious server within the 127.0.0.0/8 range. This bypasses proxy protections and allows the attacker to interact with internal services by routing the request through the vulnerable application.
- User influences target URL.
- Application must use vulnerable Axios.
- Bypass `NO_PROXY` to hit internal.
Live Threat
Current exploitation, exposure, and threat context
This vulnerability allows attackers to bypass `NO_PROXY` protection by manipulating target URLs, potentially leading to unauthorized access to internal network resources. While the affected Axios library is widely used, exploitation depends on the application's specific implementation and whether it accepts user-controlled input for URLs.
- No known exploit available.
- Not listed as KEV.
- Fixed in recent versions.
Priority actions
Operational Fix
Recommended remediation, mitigation, and detection steps
Teams should prioritize patching Axios to versions 1.15.1 or 0.31.1. If patching is delayed, implement network controls to block requests to the 127.0.0.0/8 range that bypass NO_PROXY. Monitor for any unexpected network traffic patterns originating from or targeting these internal IP ranges.
- Apply patches 1.15.1 or 0.31.1.
- Block 127.0.0.0/8 traffic bypassing NO_PROXY.
- Monitor for suspicious internal traffic.
