{ "id": "CVE-2021-33500", "sourceIdentifier": "cve@mitre.org", "published": "2021-05-21T20:15:07.723", "lastModified": "2021-05-27T21:30:34.823", "vulnStatus": "Analyzed", "descriptions": [ { "lang": "en", "value": "PuTTY before 0.75 on Windows allows remote servers to cause a denial of service (Windows GUI hang) by telling the PuTTY window to change its title repeatedly at high speed, which results in many SetWindowTextA or SetWindowTextW calls. NOTE: the same attack methodology may affect some OS-level GUIs on Linux or other platforms for similar reasons." }, { "lang": "es", "value": "PuTTY versiones anteriores a 0.75, en Windows permite a servidores remotos causar una denegaci\u00f3n de servicio (colgar la GUI de Windows) al indicar a la ventana de PuTTY que cambie su t\u00edtulo repetidamente a gran velocidad, lo que resulta en muchas llamadas a SetWindowTextA o SetWindowTextW. NOTA: la misma metodolog\u00eda de ataque puede afectar a algunas interfaces gr\u00e1ficas de usuario en Linux y otras plataformas por razones similares" } ], "metrics": { "cvssMetricV31": [ { "source": "nvd@nist.gov", "type": "Primary", "cvssData": { "version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "availabilityImpact": "HIGH", "baseScore": 7.5, "baseSeverity": "HIGH" }, "exploitabilityScore": 3.9, "impactScore": 3.6 }, { "source": "cve@mitre.org", "type": "Secondary", "cvssData": { "version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "availabilityImpact": "HIGH", "baseScore": 7.5, "baseSeverity": "HIGH" }, "exploitabilityScore": 3.9, "impactScore": 3.6 } ], "cvssMetricV2": [ { "source": "nvd@nist.gov", "type": "Primary", "cvssData": { "version": "2.0", "vectorString": "AV:N/AC:L/Au:N/C:N/I:N/A:P", "accessVector": "NETWORK", "accessComplexity": "LOW", "authentication": "NONE", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "availabilityImpact": "PARTIAL", "baseScore": 5.0 }, "baseSeverity": "MEDIUM", "exploitabilityScore": 10.0, "impactScore": 2.9, "acInsufInfo": false, "obtainAllPrivilege": false, "obtainUserPrivilege": false, "obtainOtherPrivilege": false, "userInteractionRequired": false } ] }, "weaknesses": [ { "source": "nvd@nist.gov", "type": "Primary", "description": [ { "lang": "en", "value": "NVD-CWE-noinfo" } ] } ], "configurations": [ { "operator": "AND", "nodes": [ { "operator": "OR", "negate": false, "cpeMatch": [ { "vulnerable": true, "criteria": "cpe:2.3:a:putty:putty:*:*:*:*:*:*:*:*", "versionEndExcluding": "0.75", "matchCriteriaId": "1C69E11C-8272-4BBA-924C-1EC3A3FA01CA" } ] }, { "operator": "OR", "negate": false, "cpeMatch": [ { "vulnerable": false, "criteria": "cpe:2.3:o:microsoft:windows:-:*:*:*:*:*:*:*", "matchCriteriaId": "A2572D17-1DE6-457B-99CC-64AFD54487EA" } ] } ] } ], "references": [ { "url": "https://docs.ssh-mitm.at/puttydos.html", "source": "cve@mitre.org", "tags": [ "Exploit", "Third Party Advisory" ] }, { "url": "https://github.com/ssh-mitm/ssh-mitm-plugins/blob/main/ssh_mitm_plugins/ssh/putty_dos.py", "source": "cve@mitre.org", "tags": [ "Exploit", "Third Party Advisory" ] }, { "url": "https://www.chiark.greenend.org.uk/~sgtatham/putty/changes.html", "source": "cve@mitre.org", "tags": [ "Release Notes", "Third Party Advisory" ] } ] }