CVE-2021-41130 : What You Need to Know
Learn about CVE-2021-41130, a spoofing vulnerability in Extensible Service Proxy (ESP) impacting API authentication. Understand the impact, technical details, and mitigation strategies.
Extensible Service Proxy, a.k.a. ESP, can be vulnerable to spoofing attacks impacting API authentication processes.
Understanding CVE-2021-41130
X-Endpoint-API-UserInfo in cloudendpoints Extensible Service Proxy can be spoofed, leading to potential security risks.
What is CVE-2021-41130?
- ESP enables API management for various services using JWT authentication
- A vulnerability allows attackers to send a fake JWT claim through a spoofed header
The Impact of CVE-2021-41130
- CVSS Score: 6.4 (Medium Severity)
- Attack Vector: Network
- Attack Complexity: Low
- Exploitation may lead to unauthorized access
Technical Details of CVE-2021-41130
The technical aspects of the CVE reveal crucial insights into the vulnerability.
Vulnerability Description
- Attackers can manipulate the X-Endpoint-API-UserInfo header to send fake JWT claims
Affected Systems and Versions
- Product: ESP by cloudendpoints
- Versions Affected: < 1.58.0
- Impact: Spoofing of JWT claim
Exploitation Mechanism
- Spoofed header manipulation by sending multiple X-Endpoint-API-UserInfo headers
Mitigation and Prevention
Effective strategies to mitigate and prevent exploitation.
Immediate Steps to Take
- Update ESP to version 1.58.0
- Restart containers using affected ESP versions
Long-Term Security Practices
- Regularly monitor and update ESP versions
- Enhance authorization mechanisms to detect spoofed headers
Patching and Updates
- Update to ESP version 1.58.0 to eliminate the vulnerability