CVE-2017-18924 : Exploit Details and Defense Strategies
Learn about CVE-2017-18924 involving the oauth2-server library lacking PKCE implementation in OAuth 2.0, leading to authorization code injection vulnerability. Find mitigation steps and preventive measures here.
This CVE involves the oauth2-server (also known as node-oauth2-server) up to version 3.1.1, which lacks PKCE implementation in OAuth 2.0, leading to vulnerability in preventing authorization code injection. The vendor disputes this as not being a fundamental requirement per RFC7636.
Understanding CVE-2017-18924
This CVE highlights a vulnerability in the oauth2-server library regarding PKCE implementation in OAuth 2.0.
What is CVE-2017-18924?
The oauth2-server (node-oauth2-server) up to version 3.1.1 lacks PKCE in OAuth 2.0, making it susceptible to authorization code injection.
The Impact of CVE-2017-18924
The absence of PKCE in the library's implementation poses a security risk by not effectively preventing authorization code injection.
Technical Details of CVE-2017-18924
This section delves into the specific technical aspects of the vulnerability.
Vulnerability Description
The oauth2-server (node-oauth2-server) up to version 3.1.1 does not include PKCE in its OAuth 2.0 implementation, leaving it vulnerable to authorization code injection.
Affected Systems and Versions
- Product: Not applicable
- Vendor: Not applicable
- Versions affected: Up to version 3.1.1
Exploitation Mechanism
The vulnerability allows attackers to potentially inject authorization codes due to the absence of PKCE in the OAuth 2.0 implementation.
Mitigation and Prevention
To address and prevent the risks associated with CVE-2017-18924, consider the following steps:
Immediate Steps to Take
- Implement additional security measures such as PKCE to enhance the security of OAuth 2.0 implementations.
- Regularly monitor and update the oauth2-server library to the latest secure version.
Long-Term Security Practices
- Conduct regular security assessments and audits to identify and mitigate vulnerabilities proactively.
- Stay informed about security best practices and updates in OAuth 2.0 to enhance overall system security.
Patching and Updates
- Apply patches and updates provided by the oauth2-server library to address the vulnerability and enhance security measures.