Remote code execution via five-byte MQTT length
Published Jun 5, 2020 · Updated Sep 17, 2024
Integer overflow in Zephyr RTOS 2.2.0 allows remote attackers to corrupt memory and execute code via a malformed MQTT packet. The packet_length_decode function permits a fifth variable-length header byte because it rejects only byte counts greater than four, allowing the length accumulator to overflow. Exploitation requires an application to receive an attacker-controlled MQTT packet, after which corruption occurs in the Zephyr kernel.
Summary
What happened
Integer overflow in Zephyr RTOS 2.2.0 allows remote attackers to corrupt memory and execute code via a malformed MQTT packet. The packet_length_decode function permits a fifth variable-length header byte because it rejects only byte counts greater than four, allowing the length accumulator to overflow. Exploitation requires an application to receive an attacker-controlled MQTT packet, after which corruption occurs in the Zephyr kernel.
The record
- CVE
- CVE-2020-10062
- Published
- Jun 5, 2020
- Updated
- Sep 17, 2024
- Vendor
- Zephyr Project
- Product
- Zephyr RTOS
- Classifications
- CWE-193, T1203
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Jun 5, 2020CVE publishedPublication date reported by the CVE source.
- Sep 17, 2024Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
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- Affected versionversion=2.2.0 <unspecified
What conditions does exploitation require?
What is affected?
Published CVSS scores
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Attacks
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Public exploit references
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Technologies
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Your stack
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