RIOT-OS up to 2023.10 nimble_scanlist_update buffer overflow

Summaryinfo

A vulnerability was found in RIOT-OS up to 2023.10. It has been classified as critical. Affected by this issue is the function nimble_scanlist_update. Performing a manipulation results in buffer overflow. This vulnerability is cataloged as CVE-2024-32018. It is possible to initiate the attack remotely. There is no exploit available.

Detailsinfo

A vulnerability, which was classified as critical, was found in RIOT-OS up to 2023.10. This affects the function nimble_scanlist_update. The manipulation with an unknown input leads to a buffer overflow vulnerability. CWE is classifying the issue as CWE-120. The product copies an input buffer to an output buffer without verifying that the size of the input buffer is less than the size of the output buffer, leading to a buffer overflow. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

RIOT is a real-time multi-threading operating system that supports a range of devices that are typically 8-bit, 16-bit and 32-bit microcontrollers. Most codebases define assertion macros which compile to a no-op on non-debug builds. If assertions are the only line of defense against untrusted input, the software may be exposed to attacks that leverage the lack of proper input checks. In detail, in the `nimble_scanlist_update()` function below, `len` is checked in an assertion and subsequently used in a call to `memcpy()`. If an attacker is able to provide a larger `len` value while assertions are compiled-out, they can write past the end of the fixed-length `e->ad` buffer. If the unchecked input above is attacker-controlled and crosses a security boundary, the impact of the buffer overflow vulnerability could range from denial of service to arbitrary code execution. This issue has not yet been patched. Users are advised to add manual `len` checking.

It is possible to read the advisory at github.com. This vulnerability is uniquely identified as CVE-2024-32018 since 04/09/2024. The exploitability is told to be easy. It is possible to initiate the attack remotely. Technical details of the vulnerability are known, but there is no available exploit. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 09/04/2025).

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

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Productinfo

Name

• RIOT-OS

Version

• 2023.0
• 2023.1
• 2023.2
• 2023.3
• 2023.4
• 2023.5
• 2023.6
• 2023.7
• 2023.8
• 2023.9
• 2023.10

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CPE 2.2info

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