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HIGH · 8.6

CVE-2021-1402

A vulnerability in the software-based SSL/TLS message handler of Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to trigger a reload of an affected device...

Vulnerability Description

A vulnerability in the software-based SSL/TLS message handler of Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to trigger a reload of an affected device, resulting in a denial of service (DoS) condition. The vulnerability is due to insufficient validation of SSL/TLS messages when the device performs software-based SSL decryption. An attacker could exploit this vulnerability by sending a crafted SSL/TLS message through an affected device. SSL/TLS messages sent to an affected device do not trigger this vulnerability. A successful exploit could allow the attacker to cause a process to crash. This crash would then trigger a reload of the device. No manual intervention is needed to recover the device after the reload.

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
CiscoFirepower Threat Defense>= 6.3.0, < 6.4.0
CiscoFirepower Threat Defense Virtual-
CiscoAsa 5512-X-
CiscoAsa 5515-X-
CiscoAsa 5525-X-
CiscoAsa 5545-X-
CiscoAsa 5555-X-
CiscoFirepower 1010-
CiscoFirepower 1120-
CiscoFirepower 1140-
CiscoFirepower 1150-
CiscoFirepower 2110-
CiscoFirepower 2120-
CiscoFirepower 2130-
CiscoFirepower 2140-
CiscoIsa 3000-

Related Weaknesses (CWE)

CWE-20CWE-119

References

FAQ

What is CVE-2021-1402?

CVE-2021-1402 is a vulnerability with a CVSS score of 8.6 (HIGH). A vulnerability in the software-based SSL/TLS message handler of Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to trigger a reload of an affected device...

How severe is CVE-2021-1402?

CVE-2021-1402 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-2021-1402?

Check the references section above for vendor advisories and patch information. Affected products include: Cisco Firepower Threat Defense, Cisco Firepower Threat Defense Virtual, Cisco Asa 5512-X, Cisco Asa 5515-X, Cisco Asa 5525-X.