{"id":"CVE-2021-1494","state":"PUBLISHED","title":"Multiple Cisco products are affected by a vulnerability in the Snort detection engine that could allow an unauthenticated, remote attacker to bypass a configured file policy for HT","description":"Multiple Cisco products are affected by a vulnerability in the Snort detection engine that could allow an unauthenticated, remote attacker to bypass a configured file policy for HTTP.\r\n The vulnerability is due to incorrect handling of specific HTTP header parameters. An attacker could exploit this vulnerability by sending crafted HTTP packets through an affected device. A successful exploit could allow the attacker to bypass a configured file policy for HTTP packets and deliver a malicious payload.","publishedAt":"2024-11-15T16:21:36.666Z","updatedAt":"2024-11-15T21:23:12.943Z","severity":{"score":5.8,"label":"Medium","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N","source":"cisco"},"assigner":"cisco","products":["Cisco Cisco Firepower Threat Defense Software","Cisco Cisco UTD SNORT IPS Engine Software"],"affected":[{"vendor":"Cisco","product":"Cisco Firepower Threat Defense Software","versions":[{"version":"N/A","status":"affected"}]},{"vendor":"Cisco","product":"Cisco UTD SNORT IPS Engine Software","versions":[{"version":"16.12.1a","status":"affected"},{"version":"16.12.2","status":"affected"},{"version":"16.12.3","status":"affected"},{"version":"16.12.4","status":"affected"},{"version":"16.6.1","status":"affected"},{"version":"16.6.5","status":"affected"},{"version":"16.6.6","status":"affected"},{"version":"16.6.7a","status":"affected"},{"version":"16.6.9","status":"affected"},{"version":"17.1.1","status":"affected"},{"version":"17.2.1r","status":"affected"},{"version":"17.3.1a","status":"affected"},{"version":"17.3.2","status":"affected"},{"version":"3.17.0S","status":"affected"},{"version":"3.17.1S","status":"affected"},{"version":"Fuji-16.9.2","status":"affected"},{"version":"Fuji-16.9.4","status":"affected"},{"version":"Fuji-16.9.6","status":"affected"},{"version":"Fuji-16.9.3","status":"affected"},{"version":"Fuji-16.9.7","status":"affected"},{"version":"Fuji-16.9.5","status":"affected"},{"version":"Denali-16.3.3","status":"affected"},{"version":"Denali-16.3.9","status":"affected"},{"version":"Denali-16.3.7","status":"affected"},{"version":"Denali-16.3.5","status":"affected"},{"version":"Denali-16.3.4","status":"affected"},{"version":"Everest-16.6.3","status":"affected"},{"version":"Everest-16.6.4","status":"affected"},{"version":"Everest-16.6.2","status":"affected"}]}],"references":["https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-http-fp-bp-KfDdcQhc"],"weaknesses":["CWE-693"],"ingestedAt":"2026-10-29T19:47:52.848Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2021/1xxx/CVE-2021-1494.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.1","cveMetadata":{"cveId":"CVE-2021-1494","state":"PUBLISHED","datePublished":"2024-11-15T16:21:36.666Z","dateUpdated":"2024-11-15T21:23:12.943Z","assignerShortName":"cisco","assignerOrgId":"d1c1063e-7a18-46af-9102-31f8928bc633","dateReserved":"2020-11-13T00:00:00.000Z"},"containers":{"cna":{"descriptions":[{"lang":"en","value":"Multiple Cisco products are affected by a vulnerability in the Snort detection engine that could allow an unauthenticated, remote attacker to bypass a configured file policy for HTTP.\r\n The vulnerability is due to incorrect handling of specific HTTP header parameters. An attacker could exploit this vulnerability by sending crafted HTTP packets through an affected device. A successful exploit could allow the attacker to bypass a configured file policy for HTTP packets and deliver a malicious payload."}],"affected":[{"vendor":"Cisco","product":"Cisco Firepower Threat Defense Software","versions":[{"version":"N/A","status":"affected"}]},{"vendor":"Cisco","product":"Cisco UTD SNORT IPS Engine Software","versions":[{"version":"16.12.1a","status":"affected"},{"version":"16.12.2","status":"affected"},{"version":"16.12.3","status":"affected"},{"version":"16.12.4","status":"affected"},{"version":"16.6.1","status":"affected"},{"version":"16.6.5","status":"affected"},{"version":"16.6.6","status":"affected"},{"version":"16.6.7a","status":"affected"},{"version":"16.6.9","status":"affected"},{"version":"17.1.1","status":"affected"},{"version":"17.2.1r","status":"affected"},{"version":"17.3.1a","status":"affected"},{"version":"17.3.2","status":"affected"},{"version":"3.17.0S","status":"affected"},{"version":"3.17.1S","status":"affected"},{"version":"Fuji-16.9.2","status":"affected"},{"version":"Fuji-16.9.4","status":"affected"},{"version":"Fuji-16.9.6","status":"affected"},{"version":"Fuji-16.9.3","status":"affected"},{"version":"Fuji-16.9.7","status":"affected"},{"version":"Fuji-16.9.5","status":"affected"},{"version":"Denali-16.3.3","status":"affected"},{"version":"Denali-16.3.9","status":"affected"},{"version":"Denali-16.3.7","status":"affected"},{"version":"Denali-16.3.5","status":"affected"},{"version":"Denali-16.3.4","status":"affected"},{"version":"Everest-16.6.3","status":"affected"},{"version":"Everest-16.6.4","status":"affected"},{"version":"Everest-16.6.2","status":"affected"}]}],"references":[{"url":"https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-http-fp-bp-KfDdcQhc","name":"cisco-sa-http-fp-bp-KfDdcQhc"}],"metrics":[{"format":"cvssV3_1","cvssV3_1":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N","baseScore":5.8,"baseSeverity":"MEDIUM","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"CHANGED","confidentialityImpact":"NONE","integrityImpact":"LOW","availabilityImpact":"NONE"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-693","lang":"en","description":"Protection Mechanism Failure","type":"cwe"}]}],"providerMetadata":{"shortName":"cisco","orgId":"d1c1063e-7a18-46af-9102-31f8928bc633","dateUpdated":"2024-11-15T16:21:36.666Z"},"exploits":[{"lang":"en","value":"The Cisco Product Security Incident Response Team (PSIRT) is not aware of any public announcements or malicious use of the vulnerabilities that are described in this advisory."}],"source":{"advisory":"cisco-sa-http-fp-bp-KfDdcQhc","discovery":"INTERNAL","defects":["CSCvv70864","CSCvw26645"]}},"adp":[{"title":"CISA ADP Vulnrichment","affected":[{"vendor":"cisco","product":"firepower_threat_defense_software","defaultStatus":"unknown","versions":[{"version":"0","status":"affected","lessThan":"6.4.0.12","versionType":"custom"},{"version":"6.5.0","status":"affected","lessThan":"6.6.4","versionType":"custom"},{"version":"6.7.0","status":"affected","lessThan":"6.7.0.2","versionType":"custom"}],"cpes":["cpe:2.3:a:cisco:firepower_threat_defense_software:*:*:*:*:*:*:*:*"]},{"vendor":"cisco","product":"utd_snort_ips_engine_software","defaultStatus":"unknown","versions":[{"version":"0","status":"affected","lessThan":"16.12.5","versionType":"custom"},{"version":"17.1","status":"affected","lessThan":"17.3.3","versionType":"custom"},{"version":"17.4","status":"affected","lessThan":"17.4.1","versionType":"custom"}],"cpes":["cpe:2.3:a:cisco:utd_snort_ips_engine_software:*:*:*:*:*:*:*:*"]}],"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2024-11-15T18:00:00.391599Z","id":"CVE-2021-1494","options":[{"Exploitation":"none"},{"Automatable":"yes"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2024-11-15T21:23:12.943Z"}}]}}}