CVE-2021-40118

CVSS V2 High 7.1 CVSS V3 High 7.5

Description

A vulnerability in the web services interface of Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to trigger a denial of service (DoS) condition. This vulnerability is due to improper input validation when parsing HTTPS requests. An attacker could exploit this vulnerability by sending a malicious HTTPS request to an affected device. A successful exploit could allow the attacker to cause the device to reload, resulting in a DoS condition.

Overview

CVE ID
CVE-2021-40118

Assigner
ykramarz@cisco.com

Vulnerability Status
Analyzed

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

Last Modified Date
2022-08-05T11:51:45

Weakness Enumerations

CWE	URL
CWE-787	http://cwe.mitre.org/data/definitions/787.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	9.12.4.29
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		6.4.0.13
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:009.012\(004.024\):::::::*	1	OR
cpe:2.3:o:cisco:asa_5512-x_firmware:009.015\(001\):::::::*	1	OR
cpe:2.3:o:cisco:asa_5512-x_firmware:009.015\(001.015\):::::::*	1	OR
cpe:2.3:o:cisco:asa_5512-x_firmware:009.015\(001.016\):::::::*	1	OR
cpe:2.3:o:cisco:asa_5512-x_firmware:009.016\(001\):::::::*	1	OR
cpe:2.3:h:cisco:asa_5512-x:-:::::::*	0	OR
		AND
cpe:2.3:o:cisco:asa_5505_firmware:009.012\(004.024\):::::::*	1	OR
cpe:2.3:o:cisco:asa_5505_firmware:009.015\(001\):::::::*	1	OR
cpe:2.3:o:cisco:asa_5505_firmware:009.015\(001.015\):::::::*	1	OR
cpe:2.3:o:cisco:asa_5505_firmware:009.015\(001.016\):::::::*	1	OR
cpe:2.3:o:cisco:asa_5505_firmware:009.016\(001\):::::::*	1	OR
cpe:2.3:h:cisco:asa_5505:-:::::::*	0	OR
		AND
cpe:2.3:o:cisco:asa_5515-x_firmware:009.012\(004.024\):::::::*	1	OR
cpe:2.3:o:cisco:asa_5515-x_firmware:009.015\(001\):::::::*	1	OR
cpe:2.3:o:cisco:asa_5515-x_firmware:009.015\(001.015\):::::::*	1	OR
cpe:2.3:o:cisco:asa_5515-x_firmware:009.015\(001.016\):::::::*	1	OR
cpe:2.3:o:cisco:asa_5515-x_firmware:009.016\(001\):::::::*	1	OR
cpe:2.3:h:cisco:asa_5515-x:-:::::::*	0	OR
		AND
cpe:2.3:o:cisco:asa_5525-x_firmware:009.012\(004.024\):::::::*	1	OR
cpe:2.3:o:cisco:asa_5525-x_firmware:009.015\(001\):::::::*	1	OR
cpe:2.3:o:cisco:asa_5525-x_firmware:009.015\(001.015\):::::::*	1	OR
cpe:2.3:o:cisco:asa_5525-x_firmware:009.015\(001.016\):::::::*	1	OR
cpe:2.3:o:cisco:asa_5525-x_firmware:009.016\(001\):::::::*	1	OR
cpe:2.3:h:cisco:asa_5525-x:-:::::::*	0	OR
		AND
cpe:2.3:o:cisco:asa_5545-x_firmware:009.012\(004.024\):::::::*	1	OR
cpe:2.3:o:cisco:asa_5545-x_firmware:009.015\(001\):::::::*	1	OR
cpe:2.3:o:cisco:asa_5545-x_firmware:009.015\(001.015\):::::::*	1	OR
cpe:2.3:o:cisco:asa_5545-x_firmware:009.015\(001.016\):::::::*	1	OR
cpe:2.3:o:cisco:asa_5545-x_firmware:009.016\(001\):::::::*	1	OR
cpe:2.3:h:cisco:asa_5545-x:-:::::::*	0	OR
		AND
cpe:2.3:o:cisco:asa_5555-x_firmware:009.012\(004.024\):::::::*	1	OR
cpe:2.3:o:cisco:asa_5555-x_firmware:009.015\(001\):::::::*	1	OR
cpe:2.3:o:cisco:asa_5555-x_firmware:009.015\(001.015\):::::::*	1	OR
cpe:2.3:o:cisco:asa_5555-x_firmware:009.015\(001.016\):::::::*	1	OR
cpe:2.3:o:cisco:asa_5555-x_firmware:009.016\(001\):::::::*	1	OR
cpe:2.3:h:cisco:asa_5555-x:-:::::::*	0	OR
		AND
cpe:2.3:o:cisco:asa_5580_firmware:009.012\(004.024\):::::::*	1	OR
cpe:2.3:o:cisco:asa_5580_firmware:009.015\(001\):::::::*	1	OR
cpe:2.3:o:cisco:asa_5580_firmware:009.015\(001.015\):::::::*	1	OR
cpe:2.3:o:cisco:asa_5580_firmware:009.015\(001.016\):::::::*	1	OR
cpe:2.3:o:cisco:asa_5580_firmware:009.016\(001\):::::::*	1	OR
cpe:2.3:h:cisco:asa_5580:-:::::::*	0	OR
		AND
cpe:2.3:o:cisco:asa_5585-x_firmware:009.012\(004.024\):::::::*	1	OR
cpe:2.3:o:cisco:asa_5585-x_firmware:009.015\(001\):::::::*	1	OR
cpe:2.3:o:cisco:asa_5585-x_firmware:009.015\(001.015\):::::::*	1	OR
cpe:2.3:o:cisco:asa_5585-x_firmware:009.015\(001.016\):::::::*	1	OR
cpe:2.3:o:cisco:asa_5585-x_firmware:009.016\(001\):::::::*	1	OR
cpe:2.3:h:cisco:asa_5585-x:-:::::::*	0	OR

CVSS Version 2

Version
2.0

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

Access Vector
NETWORK

Access Compatibility
MEDIUM

Authentication
NONE

Confidentiality Impact
NONE

Integrity Impact
NONE

Availability Impact
COMPLETE

Base Score
7.1

Severity
HIGH

Exploitability Score
8.6

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-asafdt-webvpn-dos-KSqJAKPA	Vendor Advisory

Sources

Source Name	Source URL
NIST	https://nvd.nist.gov/vuln/detail/CVE-2021-40118
MITRE	https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-40118

History

Created	Old Value	New Value	Data Type	Notes
2022-05-08 06:20:41				Added to TrackCVE
2022-12-05 13:22:25	psirt@cisco.com	ykramarz@cisco.com	CVE Assigner	updated
2022-12-05 13:22:25	2021-10-27T19:15Z	2021-10-27T19:15:08	CVE Published Date	updated
2022-12-05 13:22:25		2022-08-05T11:51:45	CVE Modified Date	updated
2022-12-05 13:22:25		Analyzed	Vulnerability Status	updated