CVE-2017-7509 : Exploit Details and Defense Strategies
Learn about CVE-2017-7509, a flaw in Red Hat Certificate System before 8.1.20-1 leading to denial of service. Find mitigation steps and affected versions here.
A vulnerability in Red Hat Certificate System before version 8.1.20-1 could lead to a denial of service due to an input validation flaw.
Understanding CVE-2017-7509
What is CVE-2017-7509?
Before version 8.1.20-1, a flaw in Red Hat Certificate System allows a denial of service by mishandling client-provided certificates.
The Impact of CVE-2017-7509
The vulnerability triggers an assertion error when the certreq field is missing in a certificate, leading to a denial of service situation.
Technical Details of CVE-2017-7509
Vulnerability Description
An input validation error in Red Hat Certificate System's handling of client certificates before 8.1.20-1 triggers a denial of service if the certreq field is absent.
Affected Systems and Versions
- Product: Certificate System
- Vendor: Red Hat
- Versions Affected: pki-common-8.1.20-1
Exploitation Mechanism
- Attack Complexity: Low
- Attack Vector: Network
- Privileges Required: Low
- User Interaction: Required
- Scope: Unchanged
- CVSS Base Score: 3.5 (Low)
Mitigation and Prevention
Immediate Steps to Take
- Update to version 8.1.20-1 or later to mitigate the vulnerability.
- Ensure proper input validation in certificate handling processes.
Long-Term Security Practices
- Regularly monitor and update the Red Hat Certificate System to address security issues promptly.
Patching and Updates
- Apply patches and updates provided by Red Hat to fix the input validation flaw and prevent denial of service.