CVE-2025-20730

Description

In preloader, there is a possible escalation of privilege due to an insecure default value. 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: ALPS10068463; Issue ID: MSV-4141.

CVSS Details

CVSS Score

6.7

Severity

MEDIUM

CVSS Vector

CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

Configurations (Affected Products)

cpe:2.3:a:linuxfoundation:yocto:4.0:*:*:*:*:*:*:* - VULNERABLE

cpe:2.3:a:rdkcentral:rdk-b:2024q1:*:*:*:*:*:*:* - VULNERABLE

cpe:2.3:o:google:android:13.0:*:*:*:*:*:*:* - VULNERABLE

cpe:2.3:o:google:android:14.0:*:*:*:*:*:*:* - VULNERABLE

cpe:2.3:o:google:android:15.0:*:*:*:*:*:*:* - VULNERABLE

cpe:2.3:h:mediatek:mt2737:-:*:*:*:*:*:*:* - NOT VULNERABLE

cpe:2.3:h:mediatek:mt6739:-:*:*:*:*:*:*:* - NOT VULNERABLE

cpe:2.3:h:mediatek:mt6761:-:*:*:*:*:*:*:* - NOT VULNERABLE

cpe:2.3:h:mediatek:mt6765:-:*:*:*:*:*:*:* - NOT VULNERABLE

cpe:2.3:h:mediatek:mt6768:-:*:*:*:*:*:*:* - NOT VULNERABLE

MediaTek preloader (版本在补丁ALPS10068463发布之前)

使用MediaTek芯片的Android设备（具体版本需参考厂商公告）

PoC / Exploit Code

⚠ For Security Research Only

The following code is for security research and authorized testing only.

python

# CVE-2025-20730 PoC - MediaTek Preloader Privilege Escalation
# This PoC demonstrates the concept of exploiting insecure default values
# Note: Actual exploitation requires specific MediaTek device and preloader access

import os
import struct

def exploit_preloader_privilege_escalation():
    """
    Conceptual PoC for CVE-2025-20730
    MediaTek preloader insecure default value leading to privilege escalation
    """
    print("[*] CVE-2025-20730 MediaTek Preloader Privilege Escalation PoC")
    print("[*] Target: MediaTek devices with vulnerable preloader")
    
    # Step 1: Verify system-level access exists
    if not check_system_privilege():
        print("[-] System privilege required for exploitation")
        return False
    
    print("[+] System privilege confirmed")
    
    # Step 2: Identify vulnerable preloader configuration
    vulnerable_config = identify_vulnerable_config()
    if not vulnerable_config:
        print("[-] Vulnerable configuration not found")
        return False
    
    print("[+] Vulnerable preloader configuration identified")
    
    # Step 3: Exploit insecure default value
    print("[*] Attempting to leverage insecure default value...")
    if trigger_privilege_escalation(vulnerable_config):
        print("[+] Privilege escalation successful")
        return True
    else:
        print("[-] Privilege escalation failed")
        return False

def check_system_privilege():
    """Verify current process has system-level access"""
    return os.geteuid() == 0 or os.environ.get('USER') == 'root'

def identify_vulnerable_config():
    """Identify the insecure default value in preloader configuration"""
    # In real scenario, this would read preloader memory/configuration
    return {'config_id': 'MSV-4141', 'patch_id': 'ALPS10068463'}

def trigger_privilege_escalation(config):
    """Trigger the privilege escalation via insecure default value"""
    # Actual exploitation would involve specific preloader interactions
    print(f"[*] Using patch ID: {config['patch_id']}")
    print("[*] Exploiting insecure default value configuration")
    return True

if __name__ == "__main__":
    exploit_preloader_privilege_escalation()

References

[1] CVE.org https://www.cve.org/CVERecord?id=CVE-2025-20730
[2] NVD NIST https://nvd.nist.gov/vuln/detail/CVE-2025-20730
[3] CVE Details https://www.cvedetails.com/cve/CVE-2025-20730/
[4] VulDB https://vuldb.com/cve/CVE-2025-20730
[5] https://corp.mediatek.com/product-security-bulletin/November-2025

Raw JSON Data

JSON

{"cve": {"id": "CVE-2025-20730", "sourceIdentifier": "[email protected]", "published": "2025-11-04T07:15:36.360", "lastModified": "2025-11-05T17:13:55.857", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "In preloader, there is a possible escalation of privilege due to an insecure default value. 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: ALPS10068463; Issue ID: MSV-4141."}], "metrics": {"cvssMetricV31": [{"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:H/I:H/A:H", "baseScore": 6.7, "baseSeverity": "MEDIUM", "attackVector": "LOCAL", "attackComplexity": "LOW", "privilegesRequired": "HIGH", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "HIGH"}, "exploitabilityScore": 0.8, "impactScore": 5.9}]}, "weaknesses": [{"source": "[email protected]", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-287"}]}], "configurations": [{"operator": "AND", "nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:linuxfoundation:yocto:4.0:*:*:*:*:*:*:*", "matchCriteriaId": "437D8F9D-67DF-47A5-9C96-5B51D1562951"}, {"vulnerable": true, "criteria": "cpe:2.3:a:rdkcentral:rdk-b:2024q1:*:*:*:*:*:*:*", "matchCriteriaId": "CB397DA1-62B3-48FD-B694-9FDA4DA25EDE"}, {"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"}, {"vulnerable": true, "criteria": "cpe:2.3:o:google:android:16.0:*:*:*:*:*:*:*", "matchCriteriaId": "2D49E611-5D53-479D-A981-42388FDC0E8D"}, {"vulnerable": true, "criteria": "cpe:2.3:o:openwrt:openwrt:21.02.0:-:*:*:*:*:*:*", "matchCriteriaId": "F0133207-2EED-4625-854F-8DB7770D5BF7"}, {"vulnerable": true, "criteria": "cpe:2.3:o:openwrt:openwrt:23.05.0:-:*:*:*:*:*:*", "matchCriteriaId": "00113669-2850-4F0C-913A-92CA5290746E"}]}, {"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": false, "criteria": "cpe:2.3:h:mediatek:mt2737:-:*:*:*:*:*:*:*", "matchCriteriaId": "9C2A1118-B5F7-4EF5-B329-0887B5F3430E"}, {"vulnerable": false, "criteria": "cpe:2.3:h:mediatek:mt6739:-:*:*:*:*:*:*:*", "matchCriteriaId": "7FA8A390-9F52-4CF3-9B45-936CE3E2B828"}, {"vulnerable": false, "criteria": "cpe:2.3:h:mediatek:mt6761:-:*:*:*:*:*:*:*", "matchCriteriaId": "F726F486-A86F-4215-AD93-7A07A071844A"}, {"vulnerable": false, "criteria": "cpe:2.3:h:mediatek:mt6765:-:*:*:*:*:*:*:*", "matchCriteriaId": "43E779F6-F0A0-4153-9A1D-B715C3A2F80E"}, {"vulnerable": false, "criteria": "cpe:2.3:h:mediatek:mt6768:-:*:*:*:*:*:*:*", "matchCriteriaId": "06CD97E1-8A76-48B4-9780-9698EF5A960F"}, {"vulnerable": false, "criteria": "cpe:2.3:h:mediatek:mt6781:-:*:*:*:*:*:*:*", "matchCriteriaId": "C4EEE021-6B2A-47A0-AC6B-55525A40D718"}, {"vulnerable": false, "criteria": "cpe:2.3:h:mediatek:mt6789:-:*:*:*:*:*:*:*", "matchCriteriaId": "8B9B0D82-82C1-4A77-A016-329B99C45F49"}, {"vulnerable": false, "criteria": "cpe:2.3:h:mediatek:mt6833:-:*:*:*:*:*:*:*", "matchCriteriaId": "9814939B-F05E-4870-90C0-7C0F6BAAEB39"}, {"vulnerable": false, "criteria": "cpe:2.3:h:mediatek:mt6835:-:*:*:*:*:*:*:*", "matchCriteriaId": "19A63103-C708-48EC-B44D-5E465A6B79C5"}, {"vulnerable": false, "criteria": "cpe:2.3:h:mediatek:mt6853:-:*:*:*:*:*:*:*", "matchCriteriaId": "366F1912-756B-443E-9962-224937DD7DFB"}, {"vulnerable": false, "criteria": "cpe:2.3:h:mediatek:mt6855:-:*:*:*:*:*:*:*", "matchCriteriaId": "89AFEE24-7AAD-4EDB-8C3E-EDBA3240730A"}, {"vulnerable": false, "criteria": "cpe:2.3:h:mediatek:mt6877:-:*:*:*:*:*:*:*", "matchCriteriaId": "7CA9352F-E9BD-4656-9B7C-4AFEE2C78E58"}, {"vulnerable": false, "criteria": "cpe:2.3:h:mediatek:mt6878:-:*:*:*:*:*:*:*", "matchCriteriaId": "855A8046-34ED-4891-ACE5-76AB10AC8D53"}, {"vulnerable": false, "criteria": "cpe:2.3:h:mediatek:mt6879:-:*:*:*:*:*:*:*", "matchCriteriaId": "704BE5CE-AE08-4432-A8B0-4C8BD62148AD"}, {"vulnerable": false, "criteria": "cpe:2.3:h:mediatek:mt6883:-:*:*:*:*:*:*:*", "matchCriteriaId": "15E2EC3F-9FB3-488B-B1C1-2793A416C755"}, {"vulnerable": false, "criteria": "cpe:2.3:h:mediatek:mt6885:-:*:*:*:*:*:*:*", "matchCriteriaId": "DD64413C-C774-4C4F-9551-89E1AA9469EE"}, {"vulnerable": false, "criteria": "cpe:2.3:h:mediatek:mt6886:-:*:*:*:*:*:*:*", "matchCriteriaId": "AF3E2B84-DAFE-4E11-B23B-026F719475F5"}, {"vulnerable": false, "criteria": "cpe:2.3:h:mediatek:mt6889:-:*:*:*:*:*:*:*", "matchCriteriaId": "3B787DC3-8E5A-4968-B20B-37B6257FAAE2"}, {"vulnerable": false, "c ... 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