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Cisco ASA: CVE-2018-15397: Cisco Adaptive Security Appliance IPsec VPN Denial of Service Vulnerability

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Cisco ASA: CVE-2018-15397: Cisco Adaptive Security Appliance IPsec VPN Denial of Service Vulnerability

Severity
7
CVSS
(AV:N/AC:M/Au:N/C:N/I:N/A:C)
Published
10/04/2018
Created
03/19/2019
Added
10/04/2018
Modified
05/09/2022

Description

A vulnerability in the implementation of Traffic Flow Confidentiality (TFC) over IPsec functionality in 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 restart unexpectedly, resulting in a denial of service (DoS) condition. The vulnerability is due to an error that may occur if the affected software renegotiates the encryption key for an IPsec tunnel when certain TFC traffic is in flight. An attacker could exploit this vulnerability by sending a malicious stream of TFC traffic through an established IPsec tunnel on an affected device. A successful exploit could allow the attacker to cause a daemon process on the affected device to crash, which could cause the device to crash and result in a DoS condition.

Solution(s)

  • cisco-asa-update-latest

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