CVE-2025-34450: rtl 433 Stack Overflow

Description

merbanan/rtl_433 versions up to and including 25.02 and prior to commit 25e47f8 contain a stack-based buffer overflow vulnerability in the function parse_rfraw() located in src/rfraw.c. When processing crafted or excessively large raw RF input data, the application may write beyond the bounds of a stack buffer, resulting in memory corruption or a crash. This vulnerability can be exploited to cause a denial of service and, under certain conditions, may be leveraged for further exploitation depending on the execution environment and available mitigations.

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CVSS v3.1 Score

7.8

HIGH

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

Weakness Type (CWE)

CWE-121 CWE-121

CWE-787 Out-of-bounds Write

Affected Products

Vendor	Product	Versions
rtl_433_project	rtl_433	< 25.02

References

Advisories & Patches

https://github.com/dd32/rtl_433/commit/25e47f8 https://github.com/merbanan/rtl_433/issues/3375

Exploits

https://github.com/marlinkcyber/advisories/blob/main/advisories/MCSAID-2025-004-rtl_433-rfraw-parse-overflow.md https://github.com/merbanan/rtl_433/issues/3375 https://github.com/marlinkcyber/advisories/blob/main/advisories/MCSAID-2025-004-rtl_433-rfraw-parse-overflow.md

Other References

https://www.vulncheck.com/advisories/merbanan-rtl-433-stack-based-buffer-overflow

Frequently Asked Questions

What is CVE-2025-34450? +

merbanan/rtl_433 versions up to and including 25.02 and prior to commit 25e47f8 contain a stack-based buffer overflow vulnerability in the function parse_rfraw() located in src/rfraw.c. When processing crafted or excessively large raw RF input data, the application may write beyond the bounds of a stack buffer, resulting in memory corruption or a crash. This vulnerability can be exploited to cause a denial of service and, under certain conditions, may be leveraged for further exploitation depending on the execution environment and available mitigations. It has a CVSS v3.1 base score of 7.8 (HIGH).

How severe is CVE-2025-34450? +

CVE-2025-34450 has a CVSS v3.1 score of 7.8 out of 10, rated HIGH. This is a high-severity vulnerability that should be prioritized for patching.

What products are affected by CVE-2025-34450? +

CVE-2025-34450 affects products from rtl_433_project, specifically: rtl_433. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2025-34450? +

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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