{ "document": { "acknowledgments": [ { "summary": "This vulnerability was found during internal security testing." } ], "category": "csaf_security_advisory", "csaf_version": "2.0", "notes": [ { "category": "summary", "title": "Summary", "text": "A vulnerability in the Transport Layer Security version 1.3 (TLS 1.3) policy with URL category functionality for Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to bypass a configured TLS 1.3 policy to block traffic for a specific URL.\r\n\r\nThe vulnerability is due to a logic error with Snort handling of the connection with the TLS 1.3 policy and URL category configuration. An attacker could exploit this vulnerability by sending crafted TLS 1.3 connections to an affected device. A successful exploit could allow the attacker to bypass the TLS 1.3 policy and access URLs that are outside the affected device and normally would be dropped.\r\n\r\nThere are no workarounds that address this vulnerability.\r\n\r\n" }, { "category": "general", "title": "Vulnerable Products", "text": "At the time of publication, this vulnerability affected Cisco FTD Software releases 6.4.0 through 6.4.0.8 with an SSL/TLS policy with URL category configured.\r\n\r\nSee the Details section in the bug ID(s) at the top of this advisory for the most complete and current information." }, { "category": "general", "title": "Products Confirmed Not Vulnerable", "text": "Only products listed in the Vulnerable Products [\"#vp\"] section of this advisory are known to be affected by this vulnerability.\r\n\r\nCisco has confirmed that this vulnerability does not affect Cisco Adaptive Security Appliance (ASA) Software or Cisco Firepower Management Center (FMC) Software." }, { "category": "general", "title": "Workarounds", "text": "There are no workarounds that address this vulnerability." }, { "category": "general", "title": "Fixed Software", "text": "When considering software upgrades [\"https://sec.cloudapps.cisco.com/security/center/resources/security_vulnerability_policy.html#fixes\"], customers are advised to regularly consult the advisories for Cisco products, which are available from the Cisco Security Advisories and Alerts page [\"https://www.cisco.com/go/psirt\"], to determine exposure and a complete upgrade solution.\r\n\r\nIn all cases, customers should ensure that the devices to be upgraded contain sufficient memory and confirm that current hardware and software configurations will continue to be supported properly by the new release. If the information is not clear, customers are advised to contact the Cisco Technical Assistance Center (TAC) or their contracted maintenance providers.\r\n Fixed Release\r\nAt the time of publication, Cisco expected to fix this vulnerability in Cisco FTD Software Release 6.4.0.9, scheduled for May 2020.1 Cisco FTD Software releases earlier than Release 6.4.0 are not vulnerable.\r\n\r\nSee the Details section in the bug ID(s) at the top of this advisory for the most complete and current information.\r\n\r\n1. Cisco FMC and FTD Software releases 6.0.1 and earlier have reached end of software maintenance. Customers are advised to migrate to a supported release that includes the fix for this vulnerability.\r\n\r\nTo upgrade to a fixed release of Cisco FTD Software, customers can do one of the following:\r\n\r\nFor devices that are managed by using Cisco Firepower Management Center (FMC), use the FMC interface to install the upgrade. After installation is complete, reapply the access control policy.\r\nFor devices that are managed by using Cisco Firepower Device Manager (FDM), use the FDM interface to install the upgrade. After installation is complete, reapply the access control policy." }, { "category": "general", "title": "Vulnerability Policy", "text": "To learn about Cisco security vulnerability disclosure policies and publications, see the Security Vulnerability Policy [\"https://sec.cloudapps.cisco.com/security/center/resources/security_vulnerability_policy.html\"]. This document also contains instructions for obtaining fixed software and receiving security vulnerability information from Cisco." }, { "category": "general", "title": "Exploitation and Public Announcements", "text": "The Cisco Product Security Incident Response Team (PSIRT) is not aware of any public announcements or malicious use of the vulnerability that is described in this advisory." }, { "category": "general", "title": "Source", "text": "This vulnerability was found during internal security testing." }, { "category": "legal_disclaimer", "title": "Legal Disclaimer", "text": "THIS DOCUMENT IS PROVIDED ON AN \"AS IS\" BASIS AND DOES NOT IMPLY ANY KIND OF GUARANTEE OR WARRANTY, INCLUDING THE WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR USE. YOUR USE OF THE INFORMATION ON THE DOCUMENT OR MATERIALS LINKED FROM THE DOCUMENT IS AT YOUR OWN RISK. CISCO RESERVES THE RIGHT TO CHANGE OR UPDATE THIS DOCUMENT AT ANY TIME.\r\n\r\nA standalone copy or paraphrase of the text of this document that omits the distribution URL is an uncontrolled copy and may lack important information or contain factual errors. The information in this document is intended for end users of Cisco products." } ], "publisher": { "category": "vendor", "contact_details": "psirt@cisco.com", "issuing_authority": "Cisco PSIRT", "name": "Cisco", "namespace": "https://wwww.cisco.com" }, "references": [ { "category": "self", "summary": "Cisco Firepower Threat Defense Software SSL/TLS URL Category Bypass Vulnerability", "url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ssl-bypass-O5tGum2n" }, { "category": "external", "summary": "Cisco Security Vulnerability Policy", "url": "https://sec.cloudapps.cisco.com/security/center/resources/security_vulnerability_policy.html" }, { "category": "external", "summary": "considering software upgrades", "url": "https://sec.cloudapps.cisco.com/security/center/resources/security_vulnerability_policy.html#fixes" }, { "category": "external", "summary": "Cisco Security Advisories and Alerts page", "url": "https://www.cisco.com/go/psirt" } ], "title": "Cisco Firepower Threat Defense Software SSL/TLS URL Category Bypass Vulnerability", "tracking": { "current_release_date": "2020-05-06T16:00:00+00:00", "generator": { "date": "2025-10-13T15:38:14+00:00", "engine": { "name": "TVCE" } }, "id": "cisco-sa-ssl-bypass-O5tGum2n", "initial_release_date": "2020-05-06T16:00:00+00:00", "revision_history": [ { "date": "2020-05-05T16:49:29+00:00", "number": "1.0.0", "summary": "Initial public release." } ], "status": "final", "version": "1.0.0" } }, "product_tree": { "branches": [ { "name": "Cisco", "category": "vendor", "branches": [ { "name": "Cisco Secure Firewall Threat Defense (FTD) Software", "category": "product_family", "branches": [ { "name": "6.4", "category": "product_version", "branches": [ { "name": "6.4.0", "category": "service_pack", "product": { "name": "6.4.0", "product_id": "CSAFPID-265014" } }, { "name": "6.4.0.1", "category": "service_pack", "product": { "name": "6.4.0.1", "product_id": "CSAFPID-265015" } }, { "name": "6.4.0.3", "category": "service_pack", "product": { "name": "6.4.0.3", "product_id": "CSAFPID-265950" } }, { "name": "6.4.0.2", "category": "service_pack", "product": { "name": "6.4.0.2", "product_id": "CSAFPID-268602" } }, { "name": "6.4.0.4", "category": "service_pack", "product": { "name": "6.4.0.4", "product_id": "CSAFPID-276372" } }, { "name": "6.4.0.5", "category": "service_pack", "product": { "name": "6.4.0.5", "product_id": "CSAFPID-276373" } } ] } ] } ] } ] }, "vulnerabilities": [ { "cve": "CVE-2020-3285", "ids": [ { "system_name": "Cisco Bug ID", "text": "CSCvq93669" } ], "notes": [ { "category": "other", "title": "Affected Product Comprehensiveness", "text": "Complete." } ], "product_status": { "known_affected": [ "CSAFPID-265014", "CSAFPID-265015", "CSAFPID-265950", "CSAFPID-268602", "CSAFPID-276372", "CSAFPID-276373" ] }, "release_date": "2020-05-06T16:00:00+00:00", "remediations": [ { "category": "vendor_fix", "details": "Cisco has released software updates that address this vulnerability.", "product_ids": [ "CSAFPID-265014", "CSAFPID-265015", "CSAFPID-265950", "CSAFPID-268602", "CSAFPID-276372", "CSAFPID-276373" ], "url": "https://software.cisco.com" } ], "scores": [ { "cvss_v3": { "baseScore": 5.8, "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N", "version": "3.0" }, "products": [ "CSAFPID-265014", "CSAFPID-265015", "CSAFPID-265950", "CSAFPID-268602", "CSAFPID-276372", "CSAFPID-276373" ] } ], "title": "Cisco Firepower Threat Defense TLS (1.3) URL Category Bypass Vulnerability" } ] }