CVE-2021-40117

Description

A vulnerability in SSL/TLS message handler for Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. This vulnerability exists because incoming SSL/TLS packets are not properly processed. An attacker could exploit this vulnerability by sending a crafted SSL/TLS packet to an affected device. A successful exploit could allow the attacker to cause the affected 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 – 9.12.4.26
• Cisco / asa_5505_firmware009.009(002.085) – 009.009(002.085)
• Cisco / asa_5505_firmware009.014(002.106) – 009.014(002.106)
• Cisco / asa_5512-x_firmware009.009(002.085) – 009.009(002.085)
• Cisco / asa_5512-x_firmware009.014(002.106) – 009.014(002.106)
• Cisco / asa_5515-x_firmware009.009(002.085) – 009.009(002.085)
• Cisco / asa_5515-x_firmware009.014(002.106) – 009.014(002.106)
• Cisco / asa_5525-x_firmware009.014(002.106) – 009.014(002.106)
• Cisco / asa_5525-x_firmware009.009(002.085) – 009.009(002.085)
• Cisco / asa_5545-x_firmware009.009(002.085) – 009.009(002.085)
• Cisco / asa_5545-x_firmware009.014(002.106) – 009.014(002.106)
• Cisco / asa_5555-x_firmware009.014(002.106) – 009.014(002.106)
• Cisco / asa_5555-x_firmware009.009(002.085) – 009.009(002.085)
• Cisco / asa_5580_firmware009.009(002.085) – 009.009(002.085)
• Cisco / asa_5580_firmware009.014(002.106) – 009.014(002.106)
• Cisco / asa_5585-x_firmware009.014(002.106) – 009.014(002.106)
• Cisco / asa_5585-x_firmware009.009(002.085) – 009.009(002.085)
• Cisco / Cisco Adaptive Security Appliance (ASA) Softwaren/a – n/a
• Cisco / secure_firewall_threat_defense6.2.3.17

References

• VENDOR_ADVISORYhttps://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-asaftd-dos-4ygzLKU9