CVE-2024-42483: esp-now — Exploit & Fix

Description

ESP-NOW Component provides a connectionless Wi-Fi communication protocol. An replay attacks vulnerability was discovered in the implementation of the ESP-NOW because the caches is not differentiated by message types, it is a single, shared resource for all kinds of messages, whether they are broadcast or unicast, and regardless of whether they are ciphertext or plaintext. This can result an attacker to clear the cache of its legitimate entries, there by creating an opportunity to re-inject previously captured packets. This vulnerability is fixed in 2.5.2.

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CVSS v3.1 Score

6.5

MEDIUM

CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

Weakness Type (CWE)

CWE-349 CWE-349

CWE-345 CWE-345

Affected Products

Vendor	Product	Versions
espressif	esp-now	< 2.5.2

References

Advisories & Patches

https://github.com/espressif/esp-now/commit/4e30db50d541b2909d278ef0db05de1a3d7190ef

Exploits

https://github.com/espressif/esp-now/security/advisories/GHSA-wf6q-c2xr-77xj

Frequently Asked Questions

What is CVE-2024-42483? +

ESP-NOW Component provides a connectionless Wi-Fi communication protocol. An replay attacks vulnerability was discovered in the implementation of the ESP-NOW because the caches is not differentiated by message types, it is a single, shared resource for all kinds of messages, whether they are broadcast or unicast, and regardless of whether they are ciphertext or plaintext. This can result an attacker to clear the cache of its legitimate entries, there by creating an opportunity to re-inject previously captured packets. This vulnerability is fixed in 2.5.2. It has a CVSS v3.1 base score of 6.5 (MEDIUM).

How severe is CVE-2024-42483? +

CVE-2024-42483 has a CVSS v3.1 score of 6.5 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance.

What products are affected by CVE-2024-42483? +

CVE-2024-42483 affects products from espressif, specifically: esp-now. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2024-42483? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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CVE-2024-42483