CVE-2021-40117

CVSS V2 High 7.8 CVSS V3 High 7.5

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.

Overview

CVE ID
CVE-2021-40117

Assigner
ykramarz@cisco.com

Vulnerability Status
Analyzed

Published Version
2021-10-27T19:15:08

Last Modified Date
2021-10-29T13:41:00

Weakness Enumerations

CWE	URL
CWE-400	http://cwe.mitre.org/data/definitions/400.html

CPE Configuration (Product)

CPE	Vulnerable	Operator	Version Start	Version End
		AND
cpe:2.3:a:cisco:adaptive_security_appliance::::::::	1	OR		9.8.4.40
cpe:2.3:a:cisco:adaptive_security_appliance::::::::	1	OR	9.9.0	9.12.4.26
cpe:2.3:a:cisco:adaptive_security_appliance::::::::	1	OR	9.13.0	9.14.3.9
cpe:2.3:a:cisco:adaptive_security_appliance::::::::	1	OR	9.15.0	9.15.1.17
cpe:2.3:a:cisco:adaptive_security_appliance::::::::	1	OR	9.16.0	9.16.2.3
cpe:2.3:a:cisco:firepower_threat_defense::::::::	1	OR		6.2.3.17
cpe:2.3:a:cisco:firepower_threat_defense::::::::	1	OR	6.3.0	6.4.0.13
cpe:2.3:a:cisco:firepower_threat_defense::::::::	1	OR	6.5.0	6.6.5
cpe:2.3:a:cisco:firepower_threat_defense::::::::	1	OR	6.7.0	6.7.0.3
cpe:2.3:a:cisco:firepower_threat_defense::::::::	1	OR	7.0.0	7.0.1
		AND
cpe:2.3:o:cisco:asa_5512-x_firmware:009.009\(002.085\):::::::*	1	OR
cpe:2.3:o:cisco:asa_5512-x_firmware:009.014\(002.106\):::::::*	1	OR
cpe:2.3:h:cisco:asa_5512-x:-:::::::*	0	OR
		AND
cpe:2.3:o:cisco:asa_5505_firmware:009.009\(002.085\):::::::*	1	OR
cpe:2.3:o:cisco:asa_5505_firmware:009.014\(002.106\):::::::*	1	OR
cpe:2.3:h:cisco:asa_5505:-:::::::*	0	OR
		AND
cpe:2.3:o:cisco:asa_5515-x_firmware:009.009\(002.085\):::::::*	1	OR
cpe:2.3:o:cisco:asa_5515-x_firmware:009.014\(002.106\):::::::*	1	OR
cpe:2.3:h:cisco:asa_5515-x:-:::::::*	0	OR
		AND
cpe:2.3:o:cisco:asa_5525-x_firmware:009.009\(002.085\):::::::*	1	OR
cpe:2.3:o:cisco:asa_5525-x_firmware:009.014\(002.106\):::::::*	1	OR
cpe:2.3:h:cisco:asa_5525-x:-:::::::*	0	OR
		AND
cpe:2.3:o:cisco:asa_5545-x_firmware:009.009\(002.085\):::::::*	1	OR
cpe:2.3:o:cisco:asa_5545-x_firmware:009.014\(002.106\):::::::*	1	OR
cpe:2.3:h:cisco:asa_5545-x:-:::::::*	0	OR
		AND
cpe:2.3:o:cisco:asa_5555-x_firmware:009.009\(002.085\):::::::*	1	OR
cpe:2.3:o:cisco:asa_5555-x_firmware:009.014\(002.106\):::::::*	1	OR
cpe:2.3:h:cisco:asa_5555-x:-:::::::*	0	OR
		AND
cpe:2.3:o:cisco:asa_5580_firmware:009.009\(002.085\):::::::*	1	OR
cpe:2.3:o:cisco:asa_5580_firmware:009.014\(002.106\):::::::*	1	OR
cpe:2.3:h:cisco:asa_5580:-:::::::*	0	OR
		AND
cpe:2.3:o:cisco:asa_5585-x_firmware:009.009\(002.085\):::::::*	1	OR
cpe:2.3:o:cisco:asa_5585-x_firmware:009.014\(002.106\):::::::*	1	OR
cpe:2.3:h:cisco:asa_5585-x:-:::::::*	0	OR

CVSS Version 2

Version
2.0

Vector String
AV:N/AC:L/Au:N/C:N/I:N/A:C

Access Vector
NETWORK

Access Compatibility
LOW

Authentication
NONE

Confidentiality Impact
NONE

Integrity Impact
NONE

Availability Impact
COMPLETE

Base Score
7.8

Severity
HIGH

Exploitability Score
10

Impact Score
6.9

CVSS Version 3

Version
3.1

Vector String
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Attack Vector
NETWORK

Attack Compatibility
LOW

Privileges Required
NONE

User Interaction
NONE

Scope
UNCHANGED

Confidentiality Impact
NONE

Availability Impact
HIGH

Base Score
7.5

Base Severity
HIGH

Exploitability Score
3.9

Impact Score
3.6

References

Reference URL	Reference Tags
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-asaftd-dos-4ygzLKU9	Vendor Advisory

Sources

Source Name	Source URL
NIST	https://nvd.nist.gov/vuln/detail/CVE-2021-40117
MITRE	https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-40117

History

Created	Old Value	New Value	Data Type	Notes
2022-05-10 06:49:09				Added to TrackCVE
2022-12-05 13:22:21	psirt@cisco.com	ykramarz@cisco.com	CVE Assigner	updated
2022-12-05 13:22:21	2021-10-27T19:15Z	2021-10-27T19:15:08	CVE Published Date	updated
2022-12-05 13:22:21		2021-10-29T13:41:00	CVE Modified Date	updated
2022-12-05 13:22:21		Analyzed	Vulnerability Status	updated