CVE-2021-40118
"Cisco ASA and FTD HTTPS Request DoS Vulnerability"
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.
INFO
Published Date :
Oct. 27, 2021, 7:15 p.m.
Last Modified :
Nov. 7, 2023, 3:38 a.m.
Source :
[email protected]
Remotely Exploitable :
Yes !
Impact Score :
4.0
Exploitability Score :
3.9
Affected Products
The following products are affected by CVE-2021-40118
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2021-40118.
| URL | Resource |
|---|---|
| https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-asafdt-webvpn-dos-KSqJAKPA | Vendor Advisory |
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2021-40118 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2021-40118 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Modified by [email protected]
May. 14, 2024
Action Type Old Value New Value -
CVE Modified by [email protected]
Nov. 07, 2023
Action Type Old Value New Value Removed CVSS V3 Cisco Systems, Inc. AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H Added CVSS V3.1 Cisco Systems, Inc. AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H -
CPE Deprecation Remap by [email protected]
Aug. 16, 2023
Action Type Old Value New Value Changed CPE Configuration OR *cpe:2.3:a:cisco:adaptive_security_appliance:*:*:*:*:*:*:*:* versions from (including) 9.16.0 from (excluding) 9.16.2.3 OR *cpe:2.3:o:cisco:adaptive_security_appliance_software:*:*:*:*:*:*:*:* versions from (including) 9.16.0 from (excluding) 9.16.2.3 -
CPE Deprecation Remap by [email protected]
Aug. 16, 2023
Action Type Old Value New Value Changed CPE Configuration OR *cpe:2.3:a:cisco:adaptive_security_appliance:*:*:*:*:*:*:*:* versions from (including) 9.9.0 from (excluding) 9.12.4.29 OR *cpe:2.3:o:cisco:adaptive_security_appliance_software:*:*:*:*:*:*:*:* versions from (including) 9.9.0 from (excluding) 9.12.4.29 -
CPE Deprecation Remap by [email protected]
Aug. 16, 2023
Action Type Old Value New Value Changed CPE Configuration OR *cpe:2.3:a:cisco:adaptive_security_appliance:*:*:*:*:*:*:*:* versions from (including) 9.15.0 from (excluding) 9.15.1.17 OR *cpe:2.3:o:cisco:adaptive_security_appliance_software:*:*:*:*:*:*:*:* versions from (including) 9.15.0 from (excluding) 9.15.1.17 -
CPE Deprecation Remap by [email protected]
Aug. 16, 2023
Action Type Old Value New Value Changed CPE Configuration OR *cpe:2.3:a:cisco:adaptive_security_appliance:*:*:*:*:*:*:*:* versions from (including) 9.13.0 from (excluding) 9.14.3.9 OR *cpe:2.3:o:cisco:adaptive_security_appliance_software:*:*:*:*:*:*:*:* versions from (including) 9.13.0 from (excluding) 9.14.3.9 -
Reanalysis by [email protected]
Aug. 05, 2022
Action Type Old Value New Value Removed CWE NIST CWE-20 Added CWE NIST CWE-787 -
Modified Analysis by [email protected]
Apr. 29, 2022
Action Type Old Value New Value -
CVE Modified by [email protected]
Jan. 11, 2022
Action Type Old Value New Value Changed Description Multiple vulnerabilities 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. These vulnerabilities are due to improper input validation when parsing HTTPS requests. An attacker could exploit these vulnerabilities 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. 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. -
Initial Analysis by [email protected]
Oct. 29, 2021
Action Type Old Value New Value Added CVSS V2 NIST (AV:N/AC:M/Au:N/C:N/I:N/A:C) Added CVSS V3.1 NIST AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Changed Reference Type https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-asafdt-webvpn-dos-KSqJAKPA No Types Assigned https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-asafdt-webvpn-dos-KSqJAKPA Vendor Advisory Added CWE NIST CWE-20 Added CPE Configuration OR *cpe:2.3:a:cisco:adaptive_security_appliance:*:*:*:*:*:*:*:* versions up to (excluding) 9.8.4.40 *cpe:2.3:a:cisco:adaptive_security_appliance:*:*:*:*:*:*:*:* versions from (including) 9.9.0 up to (excluding) 9.12.4.29 *cpe:2.3:a:cisco:adaptive_security_appliance:*:*:*:*:*:*:*:* versions from (including) 9.13.0 up to (excluding) 9.14.3.9 *cpe:2.3:a:cisco:adaptive_security_appliance:*:*:*:*:*:*:*:* versions from (including) 9.15.0 up to (excluding) 9.15.1.17 *cpe:2.3:a:cisco:adaptive_security_appliance:*:*:*:*:*:*:*:* versions from (including) 9.16.0 up to (excluding) 9.16.2.3 *cpe:2.3:a:cisco:firepower_threat_defense:*:*:*:*:*:*:*:* versions up to (excluding) 6.4.0.13 *cpe:2.3:a:cisco:firepower_threat_defense:*:*:*:*:*:*:*:* versions from (including) 6.5.0 up to (excluding) 6.6.5 *cpe:2.3:a:cisco:firepower_threat_defense:*:*:*:*:*:*:*:* versions from (including) 6.7.0 up to (excluding) 6.7.0.3 *cpe:2.3:a:cisco:firepower_threat_defense:*:*:*:*:*:*:*:* versions from (including) 7.0.0 up to (excluding) 7.0.1 Added CPE Configuration AND OR *cpe:2.3:o:cisco:asa_5512-x_firmware:009.012\(004.024\):*:*:*:*:*:*:* *cpe:2.3:o:cisco:asa_5512-x_firmware:009.015\(001\):*:*:*:*:*:*:* *cpe:2.3:o:cisco:asa_5512-x_firmware:009.015\(001.015\):*:*:*:*:*:*:* *cpe:2.3:o:cisco:asa_5512-x_firmware:009.015\(001.016\):*:*:*:*:*:*:* *cpe:2.3:o:cisco:asa_5512-x_firmware:009.016\(001\):*:*:*:*:*:*:* OR cpe:2.3:h:cisco:asa_5512-x:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:cisco:asa_5505_firmware:009.012\(004.024\):*:*:*:*:*:*:* *cpe:2.3:o:cisco:asa_5505_firmware:009.015\(001\):*:*:*:*:*:*:* *cpe:2.3:o:cisco:asa_5505_firmware:009.015\(001.015\):*:*:*:*:*:*:* *cpe:2.3:o:cisco:asa_5505_firmware:009.015\(001.016\):*:*:*:*:*:*:* *cpe:2.3:o:cisco:asa_5505_firmware:009.016\(001\):*:*:*:*:*:*:* OR cpe:2.3:h:cisco:asa_5505:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:cisco:asa_5515-x_firmware:009.012\(004.024\):*:*:*:*:*:*:* *cpe:2.3:o:cisco:asa_5515-x_firmware:009.015\(001\):*:*:*:*:*:*:* *cpe:2.3:o:cisco:asa_5515-x_firmware:009.015\(001.015\):*:*:*:*:*:*:* *cpe:2.3:o:cisco:asa_5515-x_firmware:009.015\(001.016\):*:*:*:*:*:*:* *cpe:2.3:o:cisco:asa_5515-x_firmware:009.016\(001\):*:*:*:*:*:*:* OR cpe:2.3:h:cisco:asa_5515-x:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:cisco:asa_5525-x_firmware:009.012\(004.024\):*:*:*:*:*:*:* *cpe:2.3:o:cisco:asa_5525-x_firmware:009.015\(001\):*:*:*:*:*:*:* *cpe:2.3:o:cisco:asa_5525-x_firmware:009.015\(001.015\):*:*:*:*:*:*:* *cpe:2.3:o:cisco:asa_5525-x_firmware:009.015\(001.016\):*:*:*:*:*:*:* *cpe:2.3:o:cisco:asa_5525-x_firmware:009.016\(001\):*:*:*:*:*:*:* OR cpe:2.3:h:cisco:asa_5525-x:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:cisco:asa_5545-x_firmware:009.012\(004.024\):*:*:*:*:*:*:* *cpe:2.3:o:cisco:asa_5545-x_firmware:009.015\(001\):*:*:*:*:*:*:* *cpe:2.3:o:cisco:asa_5545-x_firmware:009.015\(001.015\):*:*:*:*:*:*:* *cpe:2.3:o:cisco:asa_5545-x_firmware:009.015\(001.016\):*:*:*:*:*:*:* *cpe:2.3:o:cisco:asa_5545-x_firmware:009.016\(001\):*:*:*:*:*:*:* OR cpe:2.3:h:cisco:asa_5545-x:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:cisco:asa_5555-x_firmware:009.012\(004.024\):*:*:*:*:*:*:* *cpe:2.3:o:cisco:asa_5555-x_firmware:009.015\(001\):*:*:*:*:*:*:* *cpe:2.3:o:cisco:asa_5555-x_firmware:009.015\(001.015\):*:*:*:*:*:*:* *cpe:2.3:o:cisco:asa_5555-x_firmware:009.015\(001.016\):*:*:*:*:*:*:* *cpe:2.3:o:cisco:asa_5555-x_firmware:009.016\(001\):*:*:*:*:*:*:* OR cpe:2.3:h:cisco:asa_5555-x:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:cisco:asa_5580_firmware:009.012\(004.024\):*:*:*:*:*:*:* *cpe:2.3:o:cisco:asa_5580_firmware:009.015\(001\):*:*:*:*:*:*:* *cpe:2.3:o:cisco:asa_5580_firmware:009.015\(001.015\):*:*:*:*:*:*:* *cpe:2.3:o:cisco:asa_5580_firmware:009.015\(001.016\):*:*:*:*:*:*:* *cpe:2.3:o:cisco:asa_5580_firmware:009.016\(001\):*:*:*:*:*:*:* OR cpe:2.3:h:cisco:asa_5580:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:cisco:asa_5585-x_firmware:009.012\(004.024\):*:*:*:*:*:*:* *cpe:2.3:o:cisco:asa_5585-x_firmware:009.015\(001\):*:*:*:*:*:*:* *cpe:2.3:o:cisco:asa_5585-x_firmware:009.015\(001.015\):*:*:*:*:*:*:* *cpe:2.3:o:cisco:asa_5585-x_firmware:009.015\(001.016\):*:*:*:*:*:*:* *cpe:2.3:o:cisco:asa_5585-x_firmware:009.016\(001\):*:*:*:*:*:*:* OR cpe:2.3:h:cisco:asa_5585-x:-:*:*:*:*:*:*:* -
CVE Modified by [email protected]
Oct. 27, 2021
Action Type Old Value New Value Changed Description Multiple vulnerabilities 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. These vulnerabilities are due to improper input validation when parsing HTTPS requests. An attacker could exploit these vulnerabilities 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. Multiple vulnerabilities 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. These vulnerabilities are due to improper input validation when parsing HTTPS requests. An attacker could exploit these vulnerabilities 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.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2021-40118 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2021-40118
weaknesses.
Exploit Prediction
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.
0.22 }} 0.03%
score
0.60919
percentile