CVE-2025-66869

#include <stdio.h> #include <string.h> #include <stdlib.h> // PoC for CVE-2025-66869: Buffer overflow in libming strcat // This demonstrates the unsafe strcat usage pattern void vulnerable_strcat_demo() { char buffer[64]; // Initialize buffer with some data memset(buffer, 'A', 63); buffer[63] = '\0'; // This simulates the vulnerable strcat call in asan_interceptors.cpp // Attackers can craft input that exceeds buffer bounds char *malicious_input = malloc(128); memset(malicious_input, 'B', 127); malicious_input[127] = '\0'; // VULNERABLE: No bounds checking before strcat strcat(buffer, malicious_input); // This will cause buffer overflow, potentially corrupting stack free(malicious_input); } int main() { printf("CVE-2025-66869 PoC - libming strcat buffer overflow\n"); printf("This PoC demonstrates the vulnerable strcat usage pattern\n"); vulnerable_strcat_demo(); return 0; }

{"cve": {"id": "CVE-2025-66869", "sourceIdentifier": "[email protected]", "published": "2025-12-29T17:15:46.603", "lastModified": "2026-01-15T02:24:18.283", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "Buffer overflow vulnerability in function strcat in asan_interceptors.cpp in libming 0.4.8."}], "metrics": {"cvssMetricV31": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "baseScore": 7.5, "baseSeverity": "HIGH", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "availabilityImpact": "HIGH"}, "exploitabilityScore": 3.9, "impactScore": 3.6}]}, "weaknesses": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-122"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:libming:libming:0.4.8:*:*:*:*:*:*:*", "matchCriteriaId": "DD92BC79-2548-4C6F-9BDD-26C12BDF68AC"}]}]}], "references": [{"url": "https://github.com/libming/libming/issues/366", "source": "[email protected]", "tags": ["Exploit", "Issue Tracking"]}]}}