Executive Summary

CVE-2026-3137 is a critical stack-based buffer overflow vulnerability found in CodeAstro Food Ordering System version 1.0, specifically in the executable file food_ordering.exe.

The vulnerability occurs due to improper input validation when reading user input into a fixed-size stack buffer without enforcing length limits. This allows an attacker to input a string longer than the buffer size, causing the buffer to overflow and overwrite adjacent stack memory, including CPU registers.

This memory corruption can lead to access violations, program crashes, or potentially allow an attacker to redirect execution flow to arbitrary code, resulting in full system compromise with the privileges of the running user.

The attack requires local access to the system and no authentication or authorization is needed to trigger the vulnerability.

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Impact Analysis

This vulnerability can compromise the confidentiality, integrity, and availability of the affected system.

• An attacker with local access can cause the application to crash, leading to denial of service.
• More critically, an attacker can exploit the buffer overflow to execute arbitrary code with the privileges of the running user, potentially leading to full system compromise.
• Since no authentication is required, the exploit is easy to perform if local access is obtained.

No official patches or mitigations are currently available, so affected users are advised to replace the product or apply recommended coding and security practices.

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Compliance Impact

I don't know

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Detection Guidance

[{'type': 'paragraph', 'content': "This vulnerability can be detected by running the vulnerable executable food_ordering.exe and attempting to input an overly long string (e.g., 300 'a' characters) for the item’s name. This causes a stack-based buffer overflow, leading to program crashes and register corruption."}, {'type': 'paragraph', 'content': 'Debugging tools such as WinDbg can be used to confirm the vulnerability by observing corrupted CPU registers (RDI, RSI) with the hex value 0x61616161 and access violations during program execution.'}, {'type': 'paragraph', 'content': 'Suggested commands include running the executable and providing long input strings to trigger the overflow, then using debugging commands in WinDbg or similar debuggers to inspect register states and memory access violations.'}] [2, 3]

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Mitigation Strategies

Immediate mitigation steps include replacing unsafe string handling functions such as strcpy, strcat, and sprintf with safer alternatives like strncpy, strncat, and snprintf that enforce buffer size limits.

Implement strict input length validation to prevent buffer overflow by ensuring user inputs do not exceed buffer sizes.

Enable compiler security features such as stack canaries, Data Execution Prevention (DEP/NX), and Address Space Layout Randomization (ASLR) to reduce exploitation risk.

Conduct regular static and dynamic code audits to detect and fix memory management issues.

Since no official vendor patch or fix is currently available, consider replacing the affected product with a secure alternative.

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