CVE-2020-11053 : Security Advisory and Response
Learn about CVE-2020-11053, an open redirect vulnerability in OAuth2 Proxy < 5.1.1 allowing attackers to redirect users to harmful sites. Find mitigation steps here.
In OAuth2 Proxy before 5.1.1, an open redirect vulnerability exists, allowing malicious actors to bypass validation and redirect users to potentially harmful sites.
Understanding CVE-2020-11053
OAuth2 Proxy version < 5.1.1 is susceptible to an open redirect vulnerability.
What is CVE-2020-11053?
- In OAuth2 Proxy < 5.1.1, a flaw allows attackers to craft redirect URLs with encoded whitespace characters to bypass validation.
The Impact of CVE-2020-11053
- CVSS Base Score: 7.1 (High)
- Attack Vector: Network
- User Interaction: Required
- Scope: Changed
- Confidentiality Impact: Low
- Integrity Impact: Low
- Availability Impact: Low
- Privileges Required: None
Technical Details of CVE-2020-11053
OAuth2 Proxy vulnerability details.
Vulnerability Description
- Users can manipulate redirect URLs to redirect authenticated users to malicious sites.
Affected Systems and Versions
- Product: OAuth2 Proxy
- Vendor: OAuth2 Proxy
- Versions Affected: < 5.1.1
Exploitation Mechanism
- Crafted redirect URLs with encoded whitespace characters can bypass validation.
Mitigation and Prevention
Protect your systems from CVE-2020-11053.
Immediate Steps to Take
- Update OAuth2 Proxy to version 5.1.1 or later.
- Monitor and restrict user input for redirect URLs.
Long-Term Security Practices
- Regularly audit and review code for vulnerabilities.
- Educate users on safe browsing practices.
Patching and Updates
- Apply patches and updates promptly to secure systems.