CVE-2017-0897 : Vulnerability Insights and Analysis
Learn about CVE-2017-0897 affecting ExpressionEngine versions before 2.11.8 and 3.5.5, allowing remote code execution due to weak object signing token entropy. Find mitigation steps and preventive measures.
ExpressionEngine versions before 2.11.8 and 3.5.5 have a vulnerability that allows remote code execution due to weak object signing token entropy.
Understanding CVE-2017-0897
This CVE involves a low level of randomness in the object signing token generated by specific versions of ExpressionEngine, potentially leading to remote code execution.
What is CVE-2017-0897?
ExpressionEngine versions 2.x < 2.11.8 and versions 3.x < 3.5.5 generate object signing tokens with insufficient randomness, making it possible for attackers to guess the token and execute remote code.
The Impact of CVE-2017-0897
The vulnerability in CVE-2017-0897 can be exploited by malicious actors to execute remote code on affected systems, potentially leading to unauthorized access and control.
Technical Details of CVE-2017-0897
ExpressionEngine's weak object signing token entropy in specific versions poses a security risk.
Vulnerability Description
The object signing token generated by ExpressionEngine versions before 2.11.8 and 3.5.5 lacks sufficient randomness, enabling attackers to guess the token and execute remote code.
Affected Systems and Versions
- Product: ExpressionEngine
- Vendor: EllisLab
- Vulnerable Versions: Versions before 2.11.8 and 3.5.5
Exploitation Mechanism
Attackers can exploit the weak object signing token entropy to guess the token and execute remote code, potentially compromising the affected systems.
Mitigation and Prevention
Taking immediate steps and implementing long-term security practices are crucial to mitigate the risks associated with CVE-2017-0897.
Immediate Steps to Take
- Update ExpressionEngine to versions 2.11.8 or 3.5.5 or later to address the vulnerability.
- Monitor system logs for any suspicious activities that may indicate exploitation attempts.
Long-Term Security Practices
- Regularly update software and apply security patches to prevent known vulnerabilities.
- Implement strong access controls and authentication mechanisms to restrict unauthorized access.
- Conduct regular security assessments and penetration testing to identify and address potential weaknesses.
Patching and Updates
- Ensure timely installation of security updates provided by ExpressionEngine to patch the vulnerability and enhance system security.