Vulnerability Description
Buffer overflows were discovered in Contiki-NG 4.4 through 4.5, in the SNMP agent. Functions parsing the OIDs in SNMP requests lack sufficient allocated target-buffer capacity verification when writing parsed OID values. The function snmp_oid_decode_oid() may overwrite memory areas beyond the provided target buffer, when called from snmp_message_decode() upon an SNMP request reception. Because the content of the write operations is externally provided in the SNMP requests, it enables a remote overwrite of an IoT device's memory regions beyond the allocated buffer. This overflow may allow remote overwrite of stack and statically allocated variables memory regions by sending a crafted SNMP request.
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/1FypWH_g475jSL0mDFzquaATCeRIHQ2kj/view?usp=shariThird Party Advisory
- https://github.com/contiki-ng/contiki-ng/issues/1351Third Party Advisory
- https://drive.google.com/file/d/1FypWH_g475jSL0mDFzquaATCeRIHQ2kj/view?usp=shariThird Party Advisory
- https://github.com/contiki-ng/contiki-ng/issues/1351Third Party Advisory
FAQ
What is CVE-2020-14936?
CVE-2020-14936 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. Functions parsing the OIDs in SNMP requests lack sufficient allocated target-buffer capacity verification when writin...
How severe is CVE-2020-14936?
CVE-2020-14936 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-2020-14936?
Check the references section above for vendor advisories and patch information. Affected products include: Contiki-Ng Contiki-Ng.