CVE-2019-17210 : What You Need to Know
Discover the impact of CVE-2019-17210, a denial-of-service vulnerability in the MQTT library within Arm Mbed OS 2017-11-02. Learn about affected systems, exploitation mechanisms, and mitigation steps.
A vulnerability has been discovered in the MQTT library within Arm Mbed OS 2017-11-02, leading to a denial-of-service issue due to improper input validation.
Understanding CVE-2019-17210
This CVE involves a vulnerability in the MQTT library within Arm Mbed OS 2017-11-02 that can be exploited to cause a denial-of-service condition.
What is CVE-2019-17210?
The vulnerability arises from the function readMQTTLenString() in the MQTT library, which is used to retrieve the length and content of the MQTT topic name. Manipulation of user input can lead to bypassing critical checks and causing unpredictable behavior in the program.
The Impact of CVE-2019-17210
The vulnerability allows an attacker to manipulate user input, leading to a denial-of-service condition by causing the program to behave unpredictably.
Technical Details of CVE-2019-17210
This section provides detailed technical insights into the vulnerability.
Vulnerability Description
The issue lies in the readMQTTLenString() function, where user input manipulation can invalidate critical checks, resulting in unexpected behavior.
Affected Systems and Versions
- Affected Systems: Arm Mbed OS 2017-11-02
- Affected Versions: Not specified
Exploitation Mechanism
- The vulnerability stems from manipulating the mqttstring->lenstring.len variable, allowing an attacker to bypass security checks and cause the program to behave unpredictably.
Mitigation and Prevention
Protecting systems from CVE-2019-17210 requires immediate actions and long-term security practices.
Immediate Steps to Take
- Apply vendor-supplied patches or updates to mitigate the vulnerability.
- Monitor network traffic for any signs of exploitation.
Long-Term Security Practices
- Implement input validation mechanisms to prevent user input manipulation.
- Regularly update and patch software to address known vulnerabilities.
Patching and Updates
- Ensure that the affected systems are updated with the latest patches provided by Arm Mbed OS to address the vulnerability.