CVE-2018-12027 : Vulnerability Insights and Analysis
Learn about CVE-2018-12027, a security flaw in Phusion Passenger 5.3.x before 5.3.2 allowing information disclosure. Find out the impact, affected systems, exploitation, and mitigation steps.
A security flaw has been identified in SpawningKit in Phusion Passenger 5.3.x, specifically before version 5.3.2, allowing for information disclosure in a specific scenario.
Understanding CVE-2018-12027
This CVE involves a vulnerability in Phusion Passenger that could lead to the disclosure of sensitive information.
What is CVE-2018-12027?
The vulnerability in Phusion Passenger 5.3.x before version 5.3.2 allows a non-application user to replace directories writable by a regular user, potentially redirecting network traffic to the non-application user's process.
The Impact of CVE-2018-12027
The vulnerability could result in unauthorized access to sensitive information and potential redirection of network traffic to malicious processes.
Technical Details of CVE-2018-12027
This section provides more technical insights into the vulnerability.
Vulnerability Description
The flaw in Phusion Passenger 5.3.x before 5.3.2 enables a non-application user to manipulate directories, potentially redirecting network traffic.
Affected Systems and Versions
- Product: Not applicable
- Vendor: Not applicable
- Versions affected: Phusion Passenger 5.3.x before 5.3.2
Exploitation Mechanism
The vulnerability occurs when a Passenger-spawned application process indicates it is listening on a specific Unix domain socket, allowing a non-application user to replace directories and redirect network traffic.
Mitigation and Prevention
Protecting systems from CVE-2018-12027 requires immediate actions and long-term security practices.
Immediate Steps to Take
- Update Phusion Passenger to version 5.3.2 or later to mitigate the vulnerability.
- Restrict directory permissions to prevent unauthorized access.
Long-Term Security Practices
- Regularly monitor and audit directory permissions to prevent similar vulnerabilities.
- Implement the principle of least privilege to limit user access.
Patching and Updates
- Apply security patches promptly to address known vulnerabilities and enhance system security.