CVE-2019-16986 Explained : Impact and Mitigation
Learn about CVE-2019-16986 affecting FusionPBX up to v4.5.7. Understand the path traversal vulnerability, its impact, affected systems, and mitigation steps.
FusionPBX up to v4.5.7 is vulnerable to a security issue in the "download.php" and "secure_download.php" files, allowing the download of any file pathname.
Understanding CVE-2019-16986
This CVE identifies a path traversal vulnerability in FusionPBX versions up to v4.5.7.
What is CVE-2019-16986?
The vulnerability in FusionPBX allows the "f" variable from the URL to be exploited, enabling the download of any file pathname, affecting both "download.php" and "secure_download.php" files.
The Impact of CVE-2019-16986
The security flaw could lead to unauthorized access to sensitive files and data stored on the affected system.
Technical Details of CVE-2019-16986
FusionPBX up to v4.5.7 is susceptible to a path traversal vulnerability.
Vulnerability Description
The issue arises from the unsanitized "f" variable in the URL, allowing the download of arbitrary file paths.
Affected Systems and Versions
- Product: FusionPBX
- Vendor: FusionPBX
- Versions affected: up to v4.5.7
Exploitation Mechanism
Attackers can manipulate the "f" variable in the URL to access and download files from the system.
Mitigation and Prevention
To address CVE-2019-16986, follow these steps:
Immediate Steps to Take
- Apply the patches provided by FusionPBX promptly.
- Restrict access to the affected files and directories.
Long-Term Security Practices
- Regularly update FusionPBX to the latest version.
- Implement input validation to sanitize user inputs and prevent similar vulnerabilities.
Patching and Updates
Ensure that FusionPBX is regularly updated to the latest version to mitigate the risk of exploitation.