CVE-2025-36931

// CVE-2025-36931 PoC - Buffer Overflow in GetHostAddress (gxp_buffer.h) // This PoC demonstrates the vulnerability in GetHostAddress function // Compile: gcc -o poc poc.c #include <stdio.h> #include <string.h> #include <stdlib.h> // Simulated vulnerable GetHostAddress function void GetHostAddress(char* buffer, char* input, size_t input_len) { // Vulnerable: Missing bounds check // Should check: if (input_len > MAX_BUFFER_SIZE) return ERROR; memcpy(buffer, input, input_len); // No bounds checking! buffer[input_len] = '\0'; } int main() { printf("CVE-2025-36931 PoC - GetHostAddress Buffer Overflow\n"); printf("==================================================\n\n"); char buffer[64]; // Small buffer char malicious_input[256]; // Craft malicious input that exceeds buffer size memset(malicious_input, 'A', sizeof(malicious_input) - 1); malicious_input[sizeof(malicious_input) - 1] = '\0'; printf("Attempting to trigger buffer overflow...\n"); printf("Buffer size: %zu bytes\n", sizeof(buffer)); printf("Input size: %zu bytes\n\n", strlen(malicious_input)); // This will cause buffer overflow due to missing bounds check GetHostAddress(buffer, malicious_input, strlen(malicious_input)); printf("Buffer overflow triggered!\n"); printf("Data written beyond buffer boundary.\n"); printf("This can lead to local privilege escalation.\n"); return 0; } // Mitigation: // 1. Always check input length before copying // 2. Use safe string functions (strncpy, snprintf) // 3. Implement proper bounds checking in GetHostAddress

{"cve": {"id": "CVE-2025-36931", "sourceIdentifier": "[email protected]", "published": "2025-12-11T20:15:57.693", "lastModified": "2025-12-12T17:35:36.877", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "In GetHostAddress of gxp_buffer.h, there is a possible out of bounds write due to a missing bounds check. This could lead to local escalation of privilege with no additional execution privileges needed. User interaction is not needed for exploitation."}], "metrics": {"cvssMetricV31": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "baseScore": 7.8, "baseSeverity": "HIGH", "attackVector": "LOCAL", "attackComplexity": "LOW", "privilegesRequired": "LOW", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "HIGH"}, "exploitabilityScore": 1.8, "impactScore": 5.9}]}, "weaknesses": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-120"}, {"lang": "en", "value": "CWE-787"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:google:android:-:*:*:*:*:*:*:*", "matchCriteriaId": "F8B9FEC8-73B6-43B8-B24E-1F7C20D91D26"}]}]}], "references": [{"url": "https://source.android.com/security/bulletin/pixel/2025-12-01", "source": "[email protected]", "tags": ["Vendor Advisory"]}]}}