CVE-2021-40118

Description

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.

CVSS breakdown

Affected products

• Cisco / adaptive_security_appliance9.8.4.40
• Cisco / adaptive_security_appliance_software9.9.0 – 9.12.4.29
• Cisco / asa_5505_firmware009.015(001.016) – 009.015(001.016)
• Cisco / asa_5505_firmware009.016(001) – 009.016(001)
• Cisco / asa_5505_firmware009.012(004.024) – 009.012(004.024)
• Cisco / asa_5505_firmware009.015(001) – 009.015(001)
• Cisco / asa_5505_firmware009.015(001.015) – 009.015(001.015)
• Cisco / asa_5512-x_firmware009.015(001.016) – 009.015(001.016)
• Cisco / asa_5512-x_firmware009.016(001) – 009.016(001)
• Cisco / asa_5512-x_firmware009.012(004.024) – 009.012(004.024)
• Cisco / asa_5512-x_firmware009.015(001) – 009.015(001)
• Cisco / asa_5512-x_firmware009.015(001.015) – 009.015(001.015)
• Cisco / asa_5515-x_firmware009.015(001.015) – 009.015(001.015)
• Cisco / asa_5515-x_firmware009.016(001) – 009.016(001)
• Cisco / asa_5515-x_firmware009.012(004.024) – 009.012(004.024)
• Cisco / asa_5515-x_firmware009.015(001) – 009.015(001)
• Cisco / asa_5515-x_firmware009.015(001.016) – 009.015(001.016)
• Cisco / asa_5525-x_firmware009.015(001.016) – 009.015(001.016)
• Cisco / asa_5525-x_firmware009.012(004.024) – 009.012(004.024)
• Cisco / asa_5525-x_firmware009.015(001) – 009.015(001)
• Cisco / asa_5525-x_firmware009.015(001.015) – 009.015(001.015)
• Cisco / asa_5525-x_firmware009.016(001) – 009.016(001)
• Cisco / asa_5545-x_firmware009.015(001.016) – 009.015(001.016)
• Cisco / asa_5545-x_firmware009.016(001) – 009.016(001)
• Cisco / asa_5545-x_firmware009.012(004.024) – 009.012(004.024)
• Cisco / asa_5545-x_firmware009.015(001) – 009.015(001)
• Cisco / asa_5545-x_firmware009.015(001.015) – 009.015(001.015)
• Cisco / asa_5555-x_firmware009.015(001.015) – 009.015(001.015)
• Cisco / asa_5555-x_firmware009.016(001) – 009.016(001)
• Cisco / asa_5555-x_firmware009.012(004.024) – 009.012(004.024)
• Cisco / asa_5555-x_firmware009.015(001) – 009.015(001)
• Cisco / asa_5555-x_firmware009.015(001.016) – 009.015(001.016)
• Cisco / asa_5580_firmware009.015(001.015) – 009.015(001.015)
• Cisco / asa_5580_firmware009.016(001) – 009.016(001)
• Cisco / asa_5580_firmware009.012(004.024) – 009.012(004.024)
• Cisco / asa_5580_firmware009.015(001) – 009.015(001)
• Cisco / asa_5580_firmware009.015(001.016) – 009.015(001.016)
• Cisco / asa_5585-x_firmware009.015(001.016) – 009.015(001.016)
• Cisco / asa_5585-x_firmware009.016(001) – 009.016(001)
• Cisco / asa_5585-x_firmware009.012(004.024) – 009.012(004.024)
• Cisco / asa_5585-x_firmware009.015(001) – 009.015(001)
• Cisco / asa_5585-x_firmware009.015(001.015) – 009.015(001.015)
• Cisco / Cisco Adaptive Security Appliance (ASA) Softwaren/a – n/a
• Cisco / secure_firewall_threat_defense6.4.0.13

References

• VENDOR_ADVISORYhttps://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-asafdt-webvpn-dos-KSqJAKPA