CVE-2021-1402 : A vulnerability in the software-based SSL/TLS message handler of Cisco Firepower Threat Defense (FTD) Software could all

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.

Published 2021-04-29 18:15:09

Updated 2022-08-05 16:17:05

Source Cisco Systems, Inc.

View at NVD, CVE.org

Vulnerability category: OverflowInput validationDenial of service

Exploit prediction scoring system (EPSS) score for CVE-2021-1402

EPSS FAQ

0.16%

Probability of exploitation activity in the next 30 days EPSS Score History

~ 52 %

Percentile, the proportion of vulnerabilities that are scored at or less

CVSS scores for CVE-2021-1402

Base Score	Base Severity	CVSS Vector	Exploitability Score	Impact Score	Score Source
7.8	HIGH	AV:N/AC:L/Au:N/C:N/I:N/A:C	10.0	6.9	NIST
Access Vector: Network Access Complexity: Low Authentication: None Confidentiality Impact: None Integrity Impact: None Availability Impact: Complete
8.6	HIGH	CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H	3.9	4.0	Cisco Systems, Inc.
Attack Vector: Network Attack Complexity: Low Privileges Required: None User Interaction: None Scope: Changed Confidentiality: None Integrity: None Availability: High
8.6	HIGH	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H	3.9	4.0	NIST
Attack Vector: Network Attack Complexity: Low Privileges Required: None User Interaction: None Scope: Changed Confidentiality: None Integrity: None Availability: High

CWE ids for CVE-2021-1402

CWE-20 Improper Input Validation

The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.

Assigned by: nvd@nist.gov (Primary)

CWE-119 Improper Restriction of Operations within the Bounds of a Memory Buffer

The product performs operations on a memory buffer, but it reads from or writes to a memory location outside the buffer's intended boundary. This may result in read or write operations on unexpected memory locations that could be linked to other variables, data structures, or internal program data.

Assigned by: ykramarz@cisco.com (Secondary)

Products affected by CVE-2021-1402

Cisco » Firepower Threat Defense
Versions from including (>=) 6.3.0 and before (<) 6.4.0
cpe:2.3:a:cisco:firepower_threat_defense:*:*:*:*:*:*:*:*
Matching versions
When used together with: Cisco » Firepower Threat Defense Virtual » Version: N/A
When used together with: Cisco » Asa 5512-x » Version: N/A
When used together with: Cisco » Asa 5515-x » Version: N/A
When used together with: Cisco » Asa 5525-x » Version: N/A
When used together with: Cisco » Asa 5545-x » Version: N/A
When used together with: Cisco » Asa 5555-x » Version: N/A
When used together with: Cisco » Firepower 1010 » Version: N/A
When used together with: Cisco » Firepower 1120 » Version: N/A
When used together with: Cisco » Firepower 1140 » Version: N/A
When used together with: Cisco » Firepower 1150 » Version: N/A
When used together with: Cisco » Firepower 2110 » Version: N/A
When used together with: Cisco » Firepower 2120 » Version: N/A
When used together with: Cisco » Firepower 2130 » Version: N/A
When used together with: Cisco » Firepower 2140 » Version: N/A
When used together with: Cisco » Isa 3000 » Version: N/A
Cisco » Firepower Threat Defense
Versions from including (>=) 6.5.0 and before (<) 6.6.0
cpe:2.3:a:cisco:firepower_threat_defense:*:*:*:*:*:*:*:*
Matching versions
When used together with: Cisco » Firepower Threat Defense Virtual » Version: N/A
When used together with: Cisco » Asa 5512-x » Version: N/A
When used together with: Cisco » Asa 5515-x » Version: N/A
When used together with: Cisco » Asa 5525-x » Version: N/A
When used together with: Cisco » Asa 5545-x » Version: N/A
When used together with: Cisco » Asa 5555-x » Version: N/A
When used together with: Cisco » Firepower 1010 » Version: N/A
When used together with: Cisco » Firepower 1120 » Version: N/A
When used together with: Cisco » Firepower 1140 » Version: N/A
When used together with: Cisco » Firepower 1150 » Version: N/A
When used together with: Cisco » Firepower 2110 » Version: N/A
When used together with: Cisco » Firepower 2120 » Version: N/A
When used together with: Cisco » Firepower 2130 » Version: N/A
When used together with: Cisco » Firepower 2140 » Version: N/A
When used together with: Cisco » Isa 3000 » Version: N/A

Vulnerability Details : CVE-2021-1402

Exploit prediction scoring system (EPSS) score for CVE-2021-1402

CVSS scores for CVE-2021-1402

CWE ids for CVE-2021-1402

References for CVE-2021-1402

Products affected by CVE-2021-1402