CVE-2025-66217: ais-catcher Heap Overflow

Description

AIS-catcher is a multi-platform AIS receiver. Prior to version 0.64, an integer underflow vulnerability exists in the MQTT parsing logic of AIS-catcher. This vulnerability allows an attacker to trigger a massive Heap Buffer Overflow by sending a malformed MQTT packet with a manipulated Topic Length field. This leads to an immediate Denial of Service (DoS) and, when used as a library, severe Memory Corruption that can be leveraged for Remote Code Execution (RCE). This issue has been patched in version 0.64.

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CVSS v3.1 Score

7.5

HIGH

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

Weakness Type (CWE)

CWE-122 CWE-122

CWE-191 CWE-191

Affected Products

Vendor	Product	Versions
aiscatcher	ais-catcher	< 0.64

References

Advisories & Patches

https://github.com/jvde-github/AIS-catcher/commit/e0f7242eee659909adc11a4c561c3f7011bdefe7 https://github.com/jvde-github/AIS-catcher/security/advisories/GHSA-93mj-c8q3-69rg https://github.com/jvde-github/AIS-catcher/security/advisories/GHSA-93mj-c8q3-69rg

Exploits

https://github.com/jvde-github/AIS-catcher/security/advisories/GHSA-93mj-c8q3-69rg https://github.com/jvde-github/AIS-catcher/security/advisories/GHSA-93mj-c8q3-69rg

Frequently Asked Questions

What is CVE-2025-66217? +

AIS-catcher is a multi-platform AIS receiver. Prior to version 0.64, an integer underflow vulnerability exists in the MQTT parsing logic of AIS-catcher. This vulnerability allows an attacker to trigger a massive Heap Buffer Overflow by sending a malformed MQTT packet with a manipulated Topic Length field. This leads to an immediate Denial of Service (DoS) and, when used as a library, severe Memory Corruption that can be leveraged for Remote Code Execution (RCE). This issue has been patched in version 0.64. It has a CVSS v3.1 base score of 7.5 (HIGH).

How severe is CVE-2025-66217? +

CVE-2025-66217 has a CVSS v3.1 score of 7.5 out of 10, rated HIGH. This is a high-severity vulnerability that should be prioritized for patching.

What products are affected by CVE-2025-66217? +

CVE-2025-66217 affects products from aiscatcher, specifically: ais-catcher. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2025-66217? +

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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