CVE-2019-0215 : What You Need to Know
Learn about CVE-2019-0215 affecting Apache HTTP Server versions 2.4.37 and 2.4.38. Understand the impact, technical details, and mitigation steps for this access control bypass vulnerability.
Apache HTTP Server versions 2.4.37 and 2.4.38 were affected by a bug in mod_ssl, allowing clients to bypass access control restrictions. This CVE was published on April 8, 2019.
Understanding CVE-2019-0215
This CVE pertains to an access control bypass vulnerability in Apache HTTP Server versions 2.4.37 and 2.4.38.
What is CVE-2019-0215?
In Apache HTTP Server versions 2.4.37 and 2.4.38, a bug in mod_ssl enabled clients to circumvent configured access control restrictions, particularly when using per-location client certificate verification with TLSv1.3.
The Impact of CVE-2019-0215
The vulnerability allowed unauthorized clients to surpass access control restrictions, potentially leading to unauthorized access to sensitive data or resources.
Technical Details of CVE-2019-0215
Apache HTTP Server versions 2.4.37 and 2.4.38 were susceptible to an access control bypass vulnerability due to a bug in mod_ssl.
Vulnerability Description
The bug in mod_ssl permitted clients to bypass configured access control restrictions, especially in scenarios involving per-location client certificate verification with TLSv1.3.
Affected Systems and Versions
- Product: Apache HTTP Server
- Vendor: Apache
- Affected Versions: 2.4.37, 2.4.38
Exploitation Mechanism
The vulnerability could be exploited by unauthorized clients to evade access control measures, potentially gaining unauthorized access to resources.
Mitigation and Prevention
It is crucial to take immediate steps to address and prevent the exploitation of CVE-2019-0215.
Immediate Steps to Take
- Update Apache HTTP Server to a patched version that addresses the mod_ssl bug.
- Review and adjust access control configurations to mitigate the risk of unauthorized access.
Long-Term Security Practices
- Regularly monitor and update software to patch known vulnerabilities promptly.
- Implement strong access control policies and regularly review and update them.
Patching and Updates
- Apply security patches provided by Apache to fix the mod_ssl bug and prevent access control bypass vulnerabilities.