Vulnerability Details : CVE-2021-40118
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.
Vulnerability category: Memory CorruptionDenial of service
Products affected by CVE-2021-40118
- cpe:2.3:a:cisco:adaptive_security_appliance:*:*:*:*:*:*:*:*
- Cisco » Adaptive Security Appliance SoftwareVersions from including (>=) 9.15.0 and before (<) 9.15.1.17cpe:2.3:o:cisco:adaptive_security_appliance_software:*:*:*:*:*:*:*:*
- Cisco » Adaptive Security Appliance SoftwareVersions from including (>=) 9.16.0 and before (<) 9.16.2.3cpe:2.3:o:cisco:adaptive_security_appliance_software:*:*:*:*:*:*:*:*
- Cisco » Adaptive Security Appliance SoftwareVersions from including (>=) 9.13.0 and before (<) 9.14.3.9cpe:2.3:o:cisco:adaptive_security_appliance_software:*:*:*:*:*:*:*:*
- Cisco » Adaptive Security Appliance SoftwareVersions from including (>=) 9.9.0 and before (<) 9.12.4.29cpe:2.3:o:cisco:adaptive_security_appliance_software:*:*:*:*:*:*:*:*
- cpe:2.3:a:cisco:firepower_threat_defense:*:*:*:*:*:*:*:*
- cpe:2.3:a:cisco:firepower_threat_defense:*:*:*:*:*:*:*:*
- cpe:2.3:a:cisco:firepower_threat_defense:*:*:*:*:*:*:*:*
- cpe:2.3:a:cisco:firepower_threat_defense:*:*:*:*:*:*:*:*
- 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\(001\):*:*:*:*:*:*:*
- 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\(001\):*:*:*:*:*:*:*
- 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\(001\):*:*:*:*:*:*:*
- 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\(001\):*:*:*:*:*:*:*
- 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\(001\):*:*:*:*:*:*:*
- 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\(001\):*:*:*:*:*:*:*
- 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\(001\):*:*:*:*:*:*:*
- 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\(001\):*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2021-40118
0.22%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 61 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2021-40118
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
|---|---|---|---|---|---|---|
|
7.1
|
HIGH | AV:N/AC:M/Au:N/C:N/I:N/A:C |
8.6
|
6.9
|
NIST | |
|
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. | |
|
7.5
|
HIGH | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
3.9
|
3.6
|
NIST |
CWE ids for CVE-2021-40118
-
A stack-based buffer overflow condition is a condition where the buffer being overwritten is allocated on the stack (i.e., is a local variable or, rarely, a parameter to a function).Assigned by: ykramarz@cisco.com (Secondary)
-
The product writes data past the end, or before the beginning, of the intended buffer.Assigned by: nvd@nist.gov (Primary)
References for CVE-2021-40118
-
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-asafdt-webvpn-dos-KSqJAKPA
Cisco Adaptive Security Appliance Software and Firepower Threat Defense Software Web Services Denial of Service VulnerabilitiesVendor Advisory
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