A remote adversary with the ability to send arbitrary CoAP packets to be parsed by Zephyr is able to cause a denial of service. This issue affects: zephyrproject-rtos zephyr version 2.2.0 and later versions.
The product performs a calculation that can produce an integer overflow or wraparound when the logic assumes that the resulting value will always be larger than the original value. This occurs when an integer value is incremented to a value that is too large to store in the associated representation. When this occurs, the value may become a very small or negative number.
| Link | Tags |
|---|---|
| https://zephyrprojectsec.atlassian.net/browse/ZEPSEC-55 | permissions required |
| https://docs.zephyrproject.org/latest/security/vulnerabilities.html#cve-2020-10063 | vendor advisory |
| https://github.com/zephyrproject-rtos/zephyr/pull/24435 | third party advisory patch |
| https://github.com/zephyrproject-rtos/zephyr/pull/24531 | third party advisory patch |
| https://github.com/zephyrproject-rtos/zephyr/pull/24535 | third party advisory patch |
| https://github.com/zephyrproject-rtos/zephyr/pull/24530 | third party advisory patch |