CVE-2019-18217 : Vulnerability Insights and Analysis
Learn about CVE-2019-18217 affecting ProFTPD versions before 1.3.6b and 1.3.7rc before 1.3.7rc2. Find out how to mitigate this remote unauthenticated denial-of-service vulnerability.
ProFTPD versions prior to 1.3.6b and 1.3.7rc prior to 1.3.7rc2 are vulnerable to a remote unauthenticated denial-of-service attack due to incorrect handling of excessively long commands.
Understanding CVE-2019-18217
This CVE identifies a vulnerability in ProFTPD that can lead to a denial-of-service condition.
What is CVE-2019-18217?
This vulnerability in ProFTPD versions before 1.3.6b and 1.3.7rc before 1.3.7rc2 is triggered by the incorrect processing of extremely long commands, causing the main.c file in a child process to enter an infinite loop.
The Impact of CVE-2019-18217
The vulnerability allows remote attackers to exploit the server, leading to a denial-of-service condition, potentially disrupting services and causing downtime.
Technical Details of CVE-2019-18217
ProFTPD vulnerability details and affected systems.
Vulnerability Description
- Remote unauthenticated denial-of-service vulnerability in ProFTPD versions prior to 1.3.6b and 1.3.7rc prior to 1.3.7rc2.
- Caused by incorrect handling of excessively long commands, triggering an infinite loop in the main.c file of a child process.
Affected Systems and Versions
- ProFTPD versions before 1.3.6b and 1.3.7rc before 1.3.7rc2.
Exploitation Mechanism
- Attackers can send overly long commands to exploit the vulnerability, causing the server to enter an infinite loop and resulting in a denial-of-service condition.
Mitigation and Prevention
Protecting systems from CVE-2019-18217.
Immediate Steps to Take
- Update ProFTPD to version 1.3.6b or 1.3.7rc2 or later to mitigate the vulnerability.
- Monitor network traffic for any signs of exploitation.
Long-Term Security Practices
- Regularly update and patch software to address known vulnerabilities.
- Implement network security measures to detect and prevent unauthorized access.
- Conduct security audits and assessments to identify and remediate potential weaknesses.
Patching and Updates
- Apply security patches provided by ProFTPD to fix the vulnerability and enhance system security.