CVE-2020-14936 Memory corruption in n/a
Remote attackers can execute arbitrary code on IoT devices by sending crafted SNMP requests that trigger buffer overflows in the Contiki-NG SNMP agent.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2020-14936?
CVE-2020-14936 is a critical memory corruption vulnerability in n/a, published on 18 Aug 2020. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official 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.
Weakness: CWE-787
Which versions are affected by CVE-2020-14936?
It affects 1 product.
Products include Contiki-Ng Contiki-Ng.
How do I fix CVE-2020-14936?
No fix has been published for CVE-2020-14936 yet. Limit exposure of the affected software until one is available.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2020-14936 being exploited?
There is no known exploitation of CVE-2020-14936 in the wild and no public exploit code.
Other vulnerabilities in n/a
Sources
Also known as GHSA-jrf8-p6cc-fr4f.