Overview
The Common Vulnerabilities and Exposures (CVE) system has identified a critical vulnerability in spimsimulator spim v9.1.24 and earlier versions. This security flaw is given the identifier CVE-2025-29365 and pertains to a buffer overflow vulnerability in the READ_STRING_SYSCALL feature of the software. This vulnerability presents a significant risk to data security and system integrity, as it may lead to system compromise or data leakage. If exploited, threat actors can potentially gain unauthorized access to sensitive information, alter system operations, or disrupt services.
Vulnerability Summary
CVE ID: CVE-2025-29365
Severity: Critical (9.8 CVSS score)
Attack Vector: Network
Privileges Required: None
User Interaction: None
Impact: System compromise, potential data leakage
Affected Products
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Product | Affected Versions
spimsimulator spim | v9.1.24 and before
How the Exploit Works
The buffer overflow vulnerability in spimsimulator spim v9.1.24 and earlier versions is due to improper bounds checking during the processing of user-supplied input in the READ_STRING_SYSCALL feature. By sending a specially crafted input that exceeds the allocated buffer size, an attacker can overwrite adjacent memory locations, thereby causing the application to crash or execute arbitrary code.
Conceptual Example Code
Below is a conceptual example of how this vulnerability might be exploited:
$ echo -e 'GET /vulnerable/endpoint HTTP/1.1\r\nHost: target.example.com\r\nContent-Length: 10000\r\n\r\n'$(python3 -c 'print("A"*10000)') | nc target.example.com 80In this example, a hypothetical attacker sends a crafted HTTP GET request to a vulnerable endpoint on `target.example.com`. The request includes a `Content-Length` header of `10000`, followed by a string of 10,000 ‘A’ characters generated by a Python script. This string exceeds the buffer size for the READ_STRING_SYSCALL feature, causing a buffer overflow.
Please note that this is a conceptual example and may need adjustment to work in a real-world scenario. Exploiting this vulnerability could result in severe consequences, including unauthorized access, data leakage, or system compromise. It is strongly recommended that users apply the vendor patch or use a Web Application Firewall (WAF) or Intrusion Detection System (IDS) as temporary mitigation.