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CVE-2025-66217— AIS-catcher Integer Underflow in MQTT Packet Parsing leading to Heap Buffer Overflow

Quick assessment

Affected
jvde-github AIS-catcher
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

AIS-catcher是Jasper个人开发者的一个AIS接收器。 AIS-catcher 0.64之前版本存在数字错误漏洞，该漏洞源于MQTT解析逻辑存在整数下溢，可能导致拒绝服务和内存损坏。

AI Predicted 9.8 Difficulty: Easy EPSS 0.73% · P53
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I. Basic Information for CVE-2025-66217

Vulnerability Information
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Vulnerability Title
AIS-catcher Integer Underflow in MQTT Packet Parsing leading to Heap Buffer Overflow
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
堆缓冲区溢出
Source: CVE Program / CVE List V5
Vulnerability Title
AIS-catcher 数字错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
AIS-catcher是Jasper个人开发者的一个AIS接收器。 AIS-catcher 0.64之前版本存在数字错误漏洞，该漏洞源于MQTT解析逻辑存在整数下溢，可能导致拒绝服务和内存损坏。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
jvde-github AIS-catcher < 0.64 -

II. Public POCs for CVE-2025-66217

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III. Intelligence Information for CVE-2025-66217

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IV. Related Vulnerabilities

Same product: AIS-catcher
Same vendor: jvde-github
Same weakness: CWE-122

V. Comments for CVE-2025-66217

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