{"api_version":"1","generated_at":"2026-04-23T04:08:52+00:00","cve":"CVE-2019-3973","urls":{"html":"https://cve.report/CVE-2019-3973","api":"https://cve.report/api/cve/CVE-2019-3973.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2019-3973","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2019-3973"},"summary":{"title":"CVE-2019-3973","description":"Comodo Antivirus versions 11.0.0.6582 and below are vulnerable to Denial of Service affecting CmdGuard.sys via its filter port \"cmdServicePort\". A low privileged process can crash CmdVirth.exe to decrease the port's connection count followed by process hollowing a CmdVirth.exe instance with malicious code to obtain a handle to \"cmdServicePort\". Once this occurs, a specially crafted message can be sent to \"cmdServicePort\" using \"FilterSendMessage\" API. This can trigger an out-of-bounds write if lpOutBuffer parameter in FilterSendMessage API is near the end of specified buffer bounds. The crash occurs when the driver performs a memset operation which uses a size beyond the size of buffer specified, causing kernel crash.","state":"PUBLIC","assigner":"vulnreport@tenable.com","published_at":"2019-07-17 21:15:00","updated_at":"2019-07-23 18:19:00"},"problem_types":["CWE-787"],"metrics":[],"references":[{"url":"https://www.tenable.com/security/research/tra-2019-34","name":"https://www.tenable.com/security/research/tra-2019-34","refsource":"MISC","tags":["Exploit","Third Party Advisory"],"title":"Comodo Antivirus Multiple Vulnerabilities - Research Advisory | Tenable®","mime":"text/html","httpstatus":"200","archivestatus":"200"},{"url":"https://www.cve.org/CVERecord?id=CVE-2019-3973","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2019-3973","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[{"cve_year":"2019","cve_id":"3973","vulnerable":"1","versionEndIncluding":"11.0.0.6582","cpe1":"cpe","cpe2":"2.3","cpe3":"a","cpe4":"comodo","cpe5":"antivirus","cpe6":"*","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"}],"vendor_comments":[],"enrichments":{"kev":null,"epss":null,"legacy_qids":[]},"source_records":{"cve_program":{"data_type":"CVE","data_format":"MITRE","data_version":"4.0","CVE_data_meta":{"ID":"CVE-2019-3973","ASSIGNER":"vulnreport@tenable.com","STATE":"PUBLIC"},"affects":{"vendor":{"vendor_data":[{"vendor_name":"n/a","product":{"product_data":[{"product_name":"Comodo Antivirus","version":{"version_data":[{"version_value":"Versions 11.0.0.6582 and below"}]}}]}}]}},"problemtype":{"problemtype_data":[{"description":[{"lang":"eng","value":"Denial of Service"}]}]},"references":{"reference_data":[{"refsource":"MISC","name":"https://www.tenable.com/security/research/tra-2019-34","url":"https://www.tenable.com/security/research/tra-2019-34"}]},"description":{"description_data":[{"lang":"eng","value":"Comodo Antivirus versions 11.0.0.6582 and below are vulnerable to Denial of Service affecting CmdGuard.sys via its filter port \"cmdServicePort\". A low privileged process can crash CmdVirth.exe to decrease the port's connection count followed by process hollowing a CmdVirth.exe instance with malicious code to obtain a handle to \"cmdServicePort\". Once this occurs, a specially crafted message can be sent to \"cmdServicePort\" using \"FilterSendMessage\" API. This can trigger an out-of-bounds write if lpOutBuffer parameter in FilterSendMessage API is near the end of specified buffer bounds. The crash occurs when the driver performs a memset operation which uses a size beyond the size of buffer specified, causing kernel crash."}]}},"nvd":{"publishedDate":"2019-07-17 21:15:00","lastModifiedDate":"2019-07-23 18:19:00","problem_types":["CWE-787"],"metrics":{"baseMetricV3":{"cvssV3":{"version":"3.0","vectorString":"CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","attackVector":"LOCAL","attackComplexity":"LOW","privilegesRequired":"LOW","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"NONE","availabilityImpact":"HIGH","baseScore":5.5,"baseSeverity":"MEDIUM"},"exploitabilityScore":1.8,"impactScore":3.6},"baseMetricV2":{"cvssV2":{"version":"2.0","vectorString":"AV:L/AC:L/Au:N/C:N/I:N/A:C","accessVector":"LOCAL","accessComplexity":"LOW","authentication":"NONE","confidentialityImpact":"NONE","integrityImpact":"NONE","availabilityImpact":"COMPLETE","baseScore":4.9},"severity":"MEDIUM","exploitabilityScore":3.9,"impactScore":6.9,"acInsufInfo":false,"obtainAllPrivilege":false,"obtainUserPrivilege":false,"obtainOtherPrivilege":false,"userInteractionRequired":false}},"configurations":{"CVE_data_version":"4.0","nodes":[{"operator":"OR","children":[],"cpe_match":[{"vulnerable":true,"cpe23Uri":"cpe:2.3:a:comodo:antivirus:*:*:*:*:*:*:*:*","versionEndIncluding":"11.0.0.6582","cpe_name":[]}]}]}},"legacy_mitre":{"record":{"CveYear":"2019","CveId":"3973","Ordinal":"141584","Title":"CVE-2019-3973","CVE":"CVE-2019-3973","Year":"2019"},"notes":[{"CveYear":"2019","CveId":"3973","Ordinal":"1","NoteData":"Comodo Antivirus versions 11.0.0.6582 and below are vulnerable to Denial of Service affecting CmdGuard.sys via its filter port \"cmdServicePort\". A low privileged process can crash CmdVirth.exe to decrease the port's connection count followed by process hollowing a CmdVirth.exe instance with malicious code to obtain a handle to \"cmdServicePort\". Once this occurs, a specially crafted message can be sent to \"cmdServicePort\" using \"FilterSendMessage\" API. This can trigger an out-of-bounds write if lpOutBuffer parameter in FilterSendMessage API is near the end of specified buffer bounds. The crash occurs when the driver performs a memset operation which uses a size beyond the size of buffer specified, causing kernel crash.","Type":"Description","Title":null},{"CveYear":"2019","CveId":"3973","Ordinal":"2","NoteData":"2019-07-17","Type":"Other","Title":"Published"},{"CveYear":"2019","CveId":"3973","Ordinal":"3","NoteData":"2019-07-17","Type":"Other","Title":"Modified"}]}}}