CVE-2025-20745

// CVE-2025-20745 PoC Concept (Conceptual) // This is a theoretical PoC demonstrating the use-after-free vulnerability pattern // Actual exploitation requires deep knowledge of MTK APUSYS internals #include <stdio.h> #include <stdlib.h> #include <string.h> // Simulated APUSYS object structure struct apusys_obj { void* data_ptr; size_t data_size; int ref_count; }; // Simulate the vulnerable scenario void trigger_uaf(void) { // Step 1: Allocate and initialize object struct apusys_obj* obj = (struct apusys_obj*)malloc(sizeof(struct apusys_obj)); obj->data_ptr = malloc(256); obj->data_size = 256; obj->ref_count = 1; // Step 2: Free the object without clearing pointer (vulnerable) free(obj->data_ptr); // obj->data_ptr is not set to NULL - UAF vulnerability // Step 3: Attacker allocates same size to control freed memory void* malicious_data = malloc(256); memset(malicious_data, 0x41, 256); // Fill with controlled data // Step 4: Use after free - accessing controlled memory memcpy(obj->data_ptr, malicious_data, 128); // UAF trigger // Cleanup free(obj); free(malicious_data); } int main() { printf("CVE-2025-20745 PoC Concept\n"); printf("MediaTek APUSYS Use-After-Free\n"); trigger_uaf(); return 0; } /* * Note: This is a simplified conceptual PoC for educational purposes. * Real exploitation requires: * 1. Target device with vulnerable MTK APUSYS driver * 2. System-level privileges to interact with driver * 3. Detailed knowledge of kernel object layout * 4. Kernel debugging environment for verification */

{"cve": {"id": "CVE-2025-20745", "sourceIdentifier": "[email protected]", "published": "2025-11-04T07:15:47.897", "lastModified": "2025-11-05T17:11:47.253", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "In apusys, there is a possible memory corruption due to use after free. This could lead to local escalation of privilege if a malicious actor has already obtained the System privilege. User interaction is not needed for exploitation. Patch ID: ALPS10095441; Issue ID: MSV-4294."}], "metrics": {"cvssMetricV31": [{"source": "[email protected]", "type": "Primary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:L", "baseScore": 4.2, "baseSeverity": "MEDIUM", "attackVector": "LOCAL", "attackComplexity": "LOW", "privilegesRequired": "HIGH", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "availabilityImpact": "LOW"}, "exploitabilityScore": 0.8, "impactScore": 3.4}, {"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:L", "baseScore": 4.2, "baseSeverity": "MEDIUM", "attackVector": "LOCAL", "attackComplexity": "LOW", "privilegesRequired": "HIGH", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "availabilityImpact": "LOW"}, "exploitabilityScore": 0.8, "impactScore": 3.4}]}, "weaknesses": [{"source": "[email protected]", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-416"}]}], "configurations": [{"operator": "AND", "nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:google:android:13.0:*:*:*:*:*:*:*", "matchCriteriaId": "879FFD0C-9B38-4CAA-B057-1086D794D469"}, {"vulnerable": true, "criteria": "cpe:2.3:o:google:android:14.0:*:*:*:*:*:*:*", "matchCriteriaId": "2700BCC5-634D-4EC6-AB67-5B678D5F951D"}, {"vulnerable": true, "criteria": "cpe:2.3:o:google:android:15.0:*:*:*:*:*:*:*", "matchCriteriaId": "8538774C-906D-4B03-A3E7-FA7A55E0DA9E"}]}, {"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": false, "criteria": "cpe:2.3:h:mediatek:mt2718:-:*:*:*:*:*:*:*", "matchCriteriaId": "F5506327-7DDF-4E88-9EA8-10B8E32F848B"}, {"vulnerable": false, "criteria": "cpe:2.3:h:mediatek:mt6989:-:*:*:*:*:*:*:*", "matchCriteriaId": "AD7DE6B2-66D9-4A3E-B15F-D56505559255"}, {"vulnerable": false, "criteria": "cpe:2.3:h:mediatek:mt6991:-:*:*:*:*:*:*:*", "matchCriteriaId": "CBBB30DF-E963-4940-B742-F6801F68C3FC"}, {"vulnerable": false, "criteria": "cpe:2.3:h:mediatek:mt8370:-:*:*:*:*:*:*:*", "matchCriteriaId": "DA2B6BB9-7544-41A7-BF3A-344AA4CC4B31"}, {"vulnerable": false, "criteria": "cpe:2.3:h:mediatek:mt8390:-:*:*:*:*:*:*:*", "matchCriteriaId": "B774B7D7-B7DD-43A0-833F-7E39DF82CA60"}, {"vulnerable": false, "criteria": "cpe:2.3:h:mediatek:mt8395:-:*:*:*:*:*:*:*", "matchCriteriaId": "D98FBE1C-D57B-49D9-9C4E-8A133A0C1C89"}, {"vulnerable": false, "criteria": "cpe:2.3:h:mediatek:mt8676:-:*:*:*:*:*:*:*", "matchCriteriaId": "EE302F6F-170E-4350-A8F4-65BE0C50CB78"}, {"vulnerable": false, "criteria": "cpe:2.3:h:mediatek:mt8678:-:*:*:*:*:*:*:*", "matchCriteriaId": "152A5F3D-8004-4649-BDB1-E6F0798AF1CB"}, {"vulnerable": false, "criteria": "cpe:2.3:h:mediatek:mt87920:-:*:*:*:*:*:*:*", "matchCriteriaId": "D722B233-DED5-4573-9AD6-0C60565D5C8B"}]}]}], "references": [{"url": "https://corp.mediatek.com/product-security-bulletin/November-2025", "source": "[email protected]", "tags": ["Vendor Advisory"]}]}}