{ "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 antispam protection mechanisms of Cisco AsyncOS Software for Cisco Email Security Appliance (ESA) could allow an unauthenticated, remote attacker to bypass the URL reputation filters on an affected device.\r\n\r\nThis vulnerability is due to improper processing of URLs. An attacker could exploit this vulnerability by crafting a URL in a particular way. A successful exploit could allow the attacker to bypass the URL reputation filters that are configured for an affected device, which could allow malicious URLs to pass through the device.\r\n\r\nCisco has released software updates that address this vulnerability. There 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 AsyncOS Software for Cisco ESA releases earlier than Release 14.0.1.\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." }, { "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 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 Releases\r\nAt the time of publication, the release information in the following table(s) was accurate. See the Details section in the bug ID(s) at the top of this advisory for the most complete and current information.\r\n\r\nThe left column lists Cisco software releases, and the right column indicates whether a release was affected by the vulnerability described in this advisory and which release included the fix for this vulnerability.\r\n Cisco AsyncOS Software for Cisco Email Security Appliance First Fixed Release Earlier than 14.0 Migrate to a fixed release. 14.0 14.0.1\r\nThe fixed release is not available from the Software Center at Cisco.com. Administrators can upgrade the software through the GUI or CLI.\r\n\r\nIn most cases, the software can be upgraded over the network by using the System Upgrade options in the web interface of Cisco ESA. To upgrade a device using the web interface, do the following:\r\n\r\nChoose System Administration > System Upgrade.\r\nClick Upgrade Options.\r\nChoose Download and Install.\r\nChoose the appropriate release.\r\nIn the Upgrade Preparation area, choose the appropriate options.\r\nClick Proceed to begin the upgrade. A progress bar will display the status of the upgrade. After the upgrade is complete, the device will reboot.\r\n\r\nThe Cisco Product Security Incident Response Team (PSIRT) validates only the affected and fixed release information that is documented in this advisory." }, { "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 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 Email Security Appliance URL Filtering Bypass Vulnerability", "url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-esa-url-bypass-sGcfsDrp" }, { "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 page", "url": "https://www.cisco.com/go/psirt" } ], "title": "Cisco Email Security Appliance URL Filtering Bypass Vulnerability", "tracking": { "current_release_date": "2021-10-06T16:00:00+00:00", "generator": { "date": "2024-05-10T23:10:10+00:00", "engine": { "name": "TVCE" } }, "id": "cisco-sa-esa-url-bypass-sGcfsDrp", "initial_release_date": "2021-10-06T16:00:00+00:00", "revision_history": [ { "date": "2021-10-06T15:52:40+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 Email", "category": "product_family", "product": { "name": "Cisco Secure Email ", "product_id": "CSAFPID-189790" } } ] } ] }, "vulnerabilities": [ { "cve": "CVE-2021-1534", "ids": [ { "system_name": "Cisco Bug ID", "text": "CSCvx60178" } ], "notes": [ { "category": "other", "title": "Affected Product Comprehensiveness", "text": "Complete." } ], "product_status": { "known_affected": [ "CSAFPID-189790" ] }, "release_date": "2021-10-06T16:00:00+00:00", "remediations": [ { "category": "vendor_fix", "details": "Cisco has released software updates that address this vulnerability.", "product_ids": [ "CSAFPID-189790" ], "url": "https://software.cisco.com" } ], "scores": [ { "cvss_v3": { "baseScore": 5.8, "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N", "version": "3.1" }, "products": [ "CSAFPID-189790" ] } ], "title": "Cisco Email Security Appliance URL Filtering Bypass Vulnerability" } ] }