CVE-2021-39172 : Vulnerability Insights and Analysis
Discover the impact and mitigation strategies for CVE-2021-39172, a new line injection vulnerability in Cachet prior to version 2.5.1. Learn about affected systems, exploitation, and preventive measures.
Cachet, an open-source status page system, prior to version 2.5.1 allows authenticated users to exploit a new line injection vulnerability, potentially leading to arbitrary code execution on the server. The issue was addressed in version 2.5.1.
Understanding CVE-2021-39172
This CVE involves a security vulnerability in Cachet that could be exploited by authenticated users to execute arbitrary code on the server.
What is CVE-2021-39172?
- Product Affected: Cachet
- Vendor: fiveai
- Vulnerable Versions: < 2.5.1
- Vulnerability Type: Improper Neutralization of CRLF Sequences ('CRLF Injection')
The Impact of CVE-2021-39172
The CVSS v3.1 score for this vulnerability is 8.8, indicating a high severity level. The impact includes:
- Attack Vector: Network
- Attack Complexity: Low
- Privileges Required: Low
- User Interaction: None
- Confidentiality, Integrity, and Availability Impact: High
Technical Details of CVE-2021-39172
This section covers in-depth technical details of the vulnerability.
Vulnerability Description
- Authenticated users, regardless of their privileges, can exploit a new line injection in the configuration edition feature to execute arbitrary code.
Affected Systems and Versions
- Affected Product: Cachet
- Vulnerable Versions: < 2.5.1
Exploitation Mechanism
The new line injection vulnerability allows attackers to execute arbitrary code on the server, posing a severe risk to the system.
Mitigation and Prevention
Protecting systems from CVE-2021-39172 requires immediate actions and long-term security practices.
Immediate Steps to Take
- Upgrade Cachet to version 2.5.1 to mitigate the vulnerability.
- Restrict access to the administration dashboard to trusted IP addresses.
Long-Term Security Practices
- Regularly update and patch Cachet and other software to prevent similar vulnerabilities.
- Implement network segmentation and access controls to limit the attack surface.
Patching and Updates
- Patch the software to the latest version (2.5.1) to eliminate the new line injection vulnerability.