Denial-of-Service Vulnerability in MQTT Library of Arm Mbed OS
CVE-2019-17210

7.5HIGH

Key Information:

Vendor

Arm
Status
Mbed-MQtt
Mbed-os
Vendor
CVE Published:
4 November 2019

What is CVE-2019-17210?

A denial-of-service issue was identified in the MQTT library of Arm Mbed OS version 2017-11-02. The vulnerability arises when the function readMQTTLenString() is utilized to obtain the length and content of the MQTT topic name, where user input can be manipulated to yield larger values than intended. This manipulation leads to unpredictable behavior in the program as the mqttstring->lenstring.data defaults to zero after bypassing crucial validations. Such an incident can result in accessing a memory address that could compromise the functioning of applications relying on the library, particularly on Arm Cortex-M chips.

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References

https://github.com/ARMmbed/mbed-os/issues/11802
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CVSS V3.1

Score:
7.5
Severity:
HIGH
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

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