A vulnerability in the web services interface of Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to trigger a denial of service (DoS) condition. This vulnerability is due to improper input validation when parsing HTTPS requests. An attacker could exploit this vulnerability by sending a malicious HTTPS request to an affected device. A successful exploit could allow the attacker to cause the device to reload, resulting in a DoS condition.

A vulnerability in the web services interface of Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to trigger a denial of service (DoS) condition. This vulnerability is due to improper input validation when parsing HTTPS requests. An attacker could exploit this vulnerability by sending a malicious HTTPS request to an affected device. A successful exploit could allow the attacker to cause the device to reload, resulting in a DoS condition.

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According to its self-reported version, Cisco ASA Software is affected by multiple vulnerabilities.

  - Multiple vulnerabilities in the web services interface of Cisco Adaptive Security Appliance (ASA) Software     and Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to     trigger a denial of service (DoS) condition. These vulnerabilities are due to improper input validation     when parsing HTTPS requests. An attacker could exploit these vulnerabilities by sending a malicious HTTPS     request to an affected device. A successful exploit could allow the attacker to cause the device to     reload, resulting in a DoS condition. (CVE-2021-40118)

Please see the included Cisco BIDs and Cisco Security Advisory for more information.

According to its self-reported version, Cisco FTD Software is affected by multiple vulnerabilities.

  - Multiple vulnerabilities in the web services interface of Cisco Adaptive Security Appliance (ASA) Software     and Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to     trigger a denial of service (DoS) condition. These vulnerabilities are due to improper input validation     when parsing HTTPS requests. An attacker could exploit these vulnerabilities by sending a malicious HTTPS     request to an affected device. A successful exploit could allow the attacker to cause the device to     reload, resulting in a DoS condition. (CVE-2021-40118)

Please see the included Cisco BIDs and Cisco Security Advisory for more information.

ID	Name	Product	Family	Type	Severity
506168	Cisco ASA Stack-based Buffer Overflow (CVE-2021-40118)	Tenable OT Security	Tenable.ot	Remote	high
154726	Cisco Adaptive Security Appliance Software Web Services Multiple DoS (cisco-sa-asafdt-webvpn-dos-KSqJAKPA)	Nessus	CISCO	Local	high
154725	Cisco Firepower Threat Defense Software Web Services Multiple DoS (cisco-sa-asafdt-webvpn-dos-KSqJAKPA)	Nessus	CISCO	Local	high

Detections

Analytics

CVE-2021-40118

high

Tenable Plugins

high

high

high