CVE-2021-43805 : What You Need to Know
Learn about CVE-2021-43805, a high-risk ReDoS vulnerability in Solidus ecommerce platform's email validation during guest checkout, impacting system availability. Find mitigation steps and long-term security practices.
Solidus, an open-source ecommerce platform, experienced a denial of service vulnerability during guest checkout due to inefficient regular expression complexity.
Understanding CVE-2021-43805
What is CVE-2021-43805?
Solidus versions below 3.1.4, 3.0.4, and 2.11.13 are prone to a ReDoS vulnerability in the email validation process during guest checkout. The issue allowed for exponential backtracking, impacting system availability.
The Impact of CVE-2021-43805
The vulnerability posed a high risk to system availability, enabling malicious actors to exploit the email validation process in guest checkout, potentially causing denial of service attacks.
Technical Details of CVE-2021-43805
Vulnerability Description
The vulnerability stemmed from inefficient email validation using a susceptible regular expression, leading to potential denial of service.
Affected Systems and Versions
- Solidus versions >= 3.1.0 and < 3.1.4
- Solidus versions >= 3.0.0 and < 3.0.4
- Solidus versions < 2.11.13
Exploitation Mechanism
- Attack Complexity: Low
- Attack Vector: Network
- Impact: High
- Privileges Required: None
- User Interaction: None
Mitigation and Prevention
Immediate Steps to Take
- Upgrade Solidus to versions 3.1.4, 3.0.4, or apply the provided workaround
- Monitor for any signs of suspicious activities
- Apply email validity check manually if immediate upgrade is not feasible
Long-Term Security Practices
- Regularly update and patch the Solidus platform
- Implement email validation checks and secure coding practices
- Stay informed about security advisories and updates
- Secure configurations and conduct security audits
Patching and Updates
- Apply patches provided by Solidus promptly
- Keep the Solidus platform up to date with the latest secure versions