Is CVE-2023-34101 actively exploited?

No active exploitation of CVE-2023-34101 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2023-34101 be exploited remotely?

Yes. CVE-2023-34101 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2023-34101?

CVE-2023-34101 has a CVSS score of 9.1 (CRITICAL).

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CRITICAL

CVE-2023-34101

CWE-125Published: June 14, 2023· Updated: Jun 17, 2026

9.1

CVSS v3.1

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.

NVD Source

Technical Analysis

CVE-2023-34101 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in complete confidentiality breach (data exposure), availability disruption (denial of service), with a CVSS base score of 9.1.