Vulnerability Description
Buffer overflows were discovered in Contiki-NG 4.4 through 4.5, in the SNMP agent. The function parsing the received SNMP request does not verify the input message's requested variables against the capacity of the internal SNMP engine buffer. If the number of variables in the request exceeds the allocated buffer, a memory write out of the buffer boundaries occurs. This write operation provides a possibility to overwrite other variables allocated in the .bss section by the application. Because the sender of the frame is in control of the content that will be written beyond the buffer limits, and there is no strict process memory separation, this issue may allow overwriting of sensitive memory areas of an IoT device.
CVSS Score
CRITICAL
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Contiki-Ng | Contiki-Ng | >= 4.4, <= 4.5 |
Related Weaknesses (CWE)
References
- https://drive.google.com/file/d/1NIf0Y0S47Lu85uSi29kt9tgSh0jYZYfj/view?usp=shariThird Party Advisory
- https://github.com/contiki-ng/contiki-ng/issues/1352ExploitThird Party Advisory
- https://drive.google.com/file/d/1NIf0Y0S47Lu85uSi29kt9tgSh0jYZYfj/view?usp=shariThird Party Advisory
- https://github.com/contiki-ng/contiki-ng/issues/1352ExploitThird Party Advisory
FAQ
What is CVE-2020-14934?
CVE-2020-14934 is a vulnerability with a CVSS score of 9.8 (CRITICAL). Buffer overflows were discovered in Contiki-NG 4.4 through 4.5, in the SNMP agent. The function parsing the received SNMP request does not verify the input message's requested variables against the ca...
How severe is CVE-2020-14934?
CVE-2020-14934 has been rated CRITICAL with a CVSS base score of 9.8/10. This is considered a critical vulnerability requiring immediate attention.
Is there a patch for CVE-2020-14934?
Check the references section above for vendor advisories and patch information. Affected products include: Contiki-Ng Contiki-Ng.