CVE-2020-12886 Memory corruption in n/a
A buffer over-read in the Mbed OS CoAP parser allows attackers to cause denial of service or disclose memory contents via crafted packets.
- 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-2020-12886?
CVE-2020-12886 is a critical memory corruption vulnerability in n/a, published on 18 Jun 2020. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
A buffer over-read was discovered in the CoAP library in Arm Mbed OS 5.15.3. The CoAP parser is responsible for parsing received CoAP packets. The function sn_coap_parser_options_parse() parses the CoAP packet header starting from the message token. The length of the token in the received message is provided in the first byte parsed by the sn_coap_parser_options_parse() function. The length encoded in the message is not validated against the actual input buffer length before accessing the token. As a result, memory access outside of the intended boundary of the buffer may occur.
Weakness: CWE-125
Which versions are affected by CVE-2020-12886?
It affects 1 product.
Products include Arm Mbed Os.
How do I fix CVE-2020-12886?
No fix has been published for CVE-2020-12886 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-2020-12886 being exploited?
There is no known exploitation of CVE-2020-12886 in the wild and no public exploit code.
Other vulnerabilities in n/a
Sources
Also known as GHSA-8v45-9mw2-ffmm.