Vulnerability Details : CVE-2021-37604
In version 6.5 of Microchip MiWi software and all previous versions including legacy products, there is a possibility of frame counters being validated/updated prior to the message authentication. With this vulnerability in place, an attacker may increment the incoming frame counter values by injecting messages with a sufficiently large frame counter value and invalid payload. This results in denial of service/valid packets in the network. There is also a possibility of a replay attack in the stack.
Vulnerability category: Denial of service
Products affected by CVE-2021-37604
- cpe:2.3:a:microchip:miwi:6.5:*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2021-37604
0.20%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 57 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2021-37604
Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
---|---|---|---|---|---|---|
5.0
|
MEDIUM | AV:N/AC:L/Au:N/C:N/I:P/A:N |
10.0
|
2.9
|
NIST | |
7.5
|
HIGH | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N |
3.9
|
3.6
|
NIST |
CWE ids for CVE-2021-37604
-
The code contains a control flow path that does not reflect the algorithm that the path is intended to implement, leading to incorrect behavior any time this path is navigated.Assigned by: nvd@nist.gov (Primary)
References for CVE-2021-37604
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https://www.microchip.com/en-us/products/wireless-connectivity/sub-ghz/miwi-protocol
MiWi™ Protocol | Microchip TechnologyVendor Advisory
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https://www.microchip.com/product-change-notifications/#/
Product Change Notifications | MicrochipVendor Advisory
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https://www.microchip.com/en-us/development-tools-tools-and-software/libraries-code-examples-and-more/advanced-software-framework-for-sam-devices#Downloads
Advanced Software Framework (ASF) for SAM Devices | Microchip TechnologyVendor Advisory
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https://ww1.microchip.com/downloads/en/DeviceDoc/asf-release-notes-3.50.0.100-readme.pdf
Release Notes;Vendor Advisory
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https://www.microchip.com/en-us/products/wireless-connectivity/software-vulnerability-response/miwi-software-vulnerability
MiWi™ Software Vulnerability | Microchip TechnologyVendor Advisory
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