CVE-2019-17240 : What You Need to Know
Learn about CVE-2019-17240, a security flaw in Bludit 3.9.2 allowing attackers to bypass brute-force protection using manipulated HTTP headers. Find mitigation steps here.
Bludit 3.9.2 contains a vulnerability in the bl-kernel/security.class.php file that allows attackers to bypass brute-force attack protection by manipulating HTTP headers.
Understanding CVE-2019-17240
This CVE involves a security issue in Bludit 3.9.2 that enables attackers to circumvent protection against brute-force attacks by exploiting specific HTTP headers.
What is CVE-2019-17240?
In Bludit 3.9.2, a flaw in the security class file permits attackers to evade the system's defense against brute-force attacks by utilizing multiple falsified X-Forwarded-For or Client-IP HTTP headers.
The Impact of CVE-2019-17240
The vulnerability's impact is rated as low severity with a CVSS base score of 3.7. The attack complexity is high, requiring no special privileges, and can be executed over a network without user interaction. Although the confidentiality impact is low, the integrity impact is none, and availability impact is non-existent.
Technical Details of CVE-2019-17240
Bludit 3.9.2's security vulnerability can be further understood through its technical aspects.
Vulnerability Description
The flaw in bl-kernel/security.class.php allows malicious actors to bypass the brute-force protection mechanism by injecting various forged X-Forwarded-For or Client-IP HTTP headers.
Affected Systems and Versions
- Product: Not applicable
- Vendor: Not applicable
- Version: Not applicable
Exploitation Mechanism
Attackers can exploit this vulnerability by sending multiple manipulated X-Forwarded-For or Client-IP HTTP headers to the target system, tricking it into allowing unauthorized access.
Mitigation and Prevention
To address and prevent the exploitation of CVE-2019-17240, certain measures need to be taken.
Immediate Steps to Take
- Apply the patches or updates provided by Bludit promptly.
- Monitor and restrict the input of HTTP headers to prevent manipulation.
- Implement network-level protections to detect and block suspicious activities.
Long-Term Security Practices
- Regularly update and patch all software components to address known vulnerabilities.
- Conduct security audits and penetration testing to identify and mitigate potential weaknesses.
Patching and Updates
Ensure that the latest patches and updates from Bludit are installed to mitigate the vulnerability effectively.