CVE-2025-36921

// CVE-2025-36921 PoC Concept // This is a conceptual PoC demonstrating the out-of-bounds read vulnerability // in ProtocolPsUnthrottleApn() function // Note: Actual exploitation requires baseband firmware access // This PoC is for educational and security research purposes only #include <stdio.h> #include <string.h> // Simulated vulnerable function void ProtocolPsUnthrottleApn(char* apn_data, size_t length) { char buffer[256]; // Missing bounds check - vulnerability memcpy(buffer, apn_data, length); // Out of bounds read can occur here printf("Processing APN: %s\n", buffer); } // Malicious input to trigger OOB read void trigger_vulnerability() { // Crafted APN data that exceeds buffer boundary char malicious_apn[512]; memset(malicious_apn, 'A', 512); malicious_apn[511] = '\0'; // This will trigger out-of-bounds read ProtocolPsUnthrottleApn(malicious_apn, 512); } int main() { printf("CVE-2025-36921 PoC\n"); printf("Vulnerable Function: ProtocolPsUnthrottleApn\n"); printf("File: protocolpsadapter.cpp\n"); printf("Issue: Missing bounds check leads to OOB read\n\n"); trigger_vulnerability(); return 0; } // Mitigation: // 1. Add proper bounds checking before memory operations // 2. Use safe string functions with length parameters // 3. Implement input validation for APN data length // 4. Apply security updates from Google Android Security

{"cve": {"id": "CVE-2025-36921", "sourceIdentifier": "[email protected]", "published": "2025-12-11T20:15:56.647", "lastModified": "2025-12-12T17:26:51.080", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "In ProtocolPsUnthrottleApn() of protocolpsadapter.cpp, there is a possible out of bounds read due to a missing bounds check. This could lead to local information disclosure with baseband firmware compromise required. User interaction is not needed for exploitation."}], "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:N/A:N", "baseScore": 5.5, "baseSeverity": "MEDIUM", "attackVector": "LOCAL", "attackComplexity": "LOW", "privilegesRequired": "LOW", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "NONE", "availabilityImpact": "NONE"}, "exploitabilityScore": 1.8, "impactScore": 3.6}]}, "weaknesses": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-125"}]}], "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/security/bulletin/pixel/2025-12-01", "source": "[email protected]", "tags": ["Vendor Advisory"]}]}}