CVE-2023-34101 Contiki-NG vulnerable to out-of-bounds read when processing ICMP DAO input

High 7.3 Published 14 Jun 2023 Updated 30 Dec 2024

An attacker can trigger an out-of-bounds read in Contiki-NG by sending truncated ICMP DAO packets, potentially exposing sensitive memory contents.

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-2023-34101?

CVE-2023-34101 is a high-severity vulnerability in contiki-ng, published on 14 Jun 2023. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

Contiki-NG is an operating system for internet of things devices. In version 4.8 and prior, when processing ICMP DAO packets in the `dao_input_storing` function, the Contiki-NG OS does not verify that the packet buffer is big enough to contain the bytes it needs before accessing them. Up to 16 bytes can be read out of bounds in the `dao_input_storing` function. An attacker can truncate an ICMP packet so that it does not contain enough data, leading to an out-of-bounds read on these lines. The problem has been patched in the "develop" branch of Contiki-NG, and is expected to be included in release 4.9. As a workaround, one can apply the changes in Contiki-NG pull request #2435 to patch the system.

Weakness: CWE-125

Which versions are affected by CVE-2023-34101?

It affects 1 product.

Products include Contiki-Ng Contiki-Ng.

How do I fix CVE-2023-34101?

No fix has been published for CVE-2023-34101 yet. Limit exposure of the affected software until one is available.

Is CVE-2023-34101 being exploited?

There is no known exploitation of CVE-2023-34101 in the wild and no public exploit code.

Sources

Also known as GHSA-fp66-ff6x-7w2w.