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HIGH · 8.6

CVE-2021-40117

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 cau...

Vulnerability 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 Score

8.6

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
CHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH

Affected Products

VendorProductVersions
CiscoAdaptive Security Appliance< 9.8.4.40
CiscoFirepower Threat Defense< 6.2.3.17
CiscoAdaptive Security Appliance Software>= 9.9.0, < 9.12.4.26
CiscoAsa 5512-X Firmware009.009\(002.085\)
CiscoAsa 5512-X-
CiscoAsa 5505 Firmware009.009\(002.085\)
CiscoAsa 5505-
CiscoAsa 5515-X Firmware009.009\(002.085\)
CiscoAsa 5515-X-
CiscoAsa 5525-X Firmware009.009\(002.085\)
CiscoAsa 5525-X-
CiscoAsa 5545-X Firmware009.009\(002.085\)
CiscoAsa 5545-X-
CiscoAsa 5555-X Firmware009.009\(002.085\)
CiscoAsa 5555-X-
CiscoAsa 5580 Firmware009.009\(002.085\)
CiscoAsa 5580-
CiscoAsa 5585-X Firmware009.009\(002.085\)
CiscoAsa 5585-X-

Related Weaknesses (CWE)

CWE-119CWE-400

References

FAQ

What is CVE-2021-40117?

CVE-2021-40117 is a vulnerability with a CVSS score of 8.6 (HIGH). 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 cau...

How severe is CVE-2021-40117?

CVE-2021-40117 has been rated HIGH with a CVSS base score of 8.6/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2021-40117?

Check the references section above for vendor advisories and patch information. Affected products include: Cisco Adaptive Security Appliance, Cisco Firepower Threat Defense, Cisco Adaptive Security Appliance Software, Cisco Asa 5512-X Firmware, Cisco Asa 5512-X.