CVE-2023-28116 Buffer overflow in L2CAP due to misconfigured MTU
An out-of-bounds write in the BLE L2CAP module allows attackers to cause buffer overflows via large packets, potentially leading to code execution or crashes.
- 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-2023-28116?
CVE-2023-28116 is a high-severity memory corruption vulnerability in contiki-ng, published on 17 Mar 2023. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Contiki-NG is an open-source, cross-platform operating system for internet of things (IoT) devices. In versions 4.8 and prior, an out-of-bounds write can occur in the BLE L2CAP module of the Contiki-NG operating system. The network stack of Contiki-NG uses a global buffer (packetbuf) for processing of packets, with the size of PACKETBUF_SIZE. In particular, when using the BLE L2CAP module with the default configuration, the PACKETBUF_SIZE value becomes larger then the actual size of the packetbuf. When large packets are processed by the L2CAP module, a buffer overflow can therefore occur when copying the packet data to the packetbuf. The vulnerability has been patched in the "develop" branch of Contiki-NG, and will be included in release 4.9. The problem can be worked around by applying the patch manually.
Which versions are affected by CVE-2023-28116?
It affects 1 product.
Products include Contiki-Ng Contiki-Ng.
How do I fix CVE-2023-28116?
No fix has been published for CVE-2023-28116 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-2023-28116 being exploited?
There is no known exploitation of CVE-2023-28116 in the wild and no public exploit code.
Other vulnerabilities in contiki-ng
Sources
Also known as GHSA-m737-4vx6-pfqp.