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A vulnerability in the TCP processing engine of Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to cause an affected device to reload, resulting in a denial of service (DoS) condition. The vulnerability is due to the improper handling of TCP traffic. An attacker could exploit this vulnerability by sending a specific sequence of packets at a high rate through an affected device. A successful exploit could allow the attacker to temporarily disrupt traffic through the device while it reboots. Cisco has released software updates that address this vulnerability. There are no workarounds that address this vulnerability. This advisory is available at the following link: https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190501-asa-frpwrtd-dos
Please refer to the Security Advisory.
Please refer to the Security Advisory.
Please refer to the Security Advisory. The associated security advisory provides a recommended software release for addressing this vulnerability. This recommended release may not be the first fixed release as listed in this defect. This difference is due to the potential impact of the following defect: CSCvo56675 ASA traceback and reload when trying to switch from ACTIVE to STANDBY. Thread Name: fover_FSM_thread The above defect could result in a crash of the device depending on configured services. Please consider this if choosing to use a release other than the recommended release from the security advisory.
The Cisco PSIRT has assigned this bug the following CVSS version 3 score. The Base CVSS score as of the time of evaluation is 8.6: https://tools.cisco.com/security/center/cvssCalculator.x?version=3.0&vector=CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H CVE ID CVE-2019-1694 has been assigned to document this issue. Additional information on Cisco''s security vulnerability policy can be found at the following URL: http://www.cisco.com/en/US/products/products_security_vulnerability_policy.html
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