Cisco Adaptive Security Appliance Software and Firepower Threat Defense Software Web Services Denial of Service Vulnerability
Summary
| CVE | CVE-2021-1573 |
|---|---|
| State | PUBLISHED |
| Assigner | cisco |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2022-01-11 19:15:07 UTC |
| Updated | 2026-08-11 19:37:30 UTC |
| 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. |
Risk And Classification
Primary CVSS: v3.1 7.5 HIGH from [email protected]
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Problem Types: CWE-121 | CWE-787 | CWE-121 CWE-121 Stack-based Buffer Overflow | CWE-787 CWE-787 Out-of-bounds Write
| Version | Source | Type | Score | Severity | Vector |
|---|---|---|---|---|---|
| 3.1 | [email protected] | Primary | 7.5 | HIGH | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
| 3.1 | [email protected] | Secondary | 8.6 | HIGH | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H |
| 3.1 | CNA | DECLARED | 8.6 | HIGH | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H |
| 2.0 | [email protected] | Primary | 7.1 | AV:N/AC:M/Au:N/C:N/I:N/A:C |
CVSS v3.1 Breakdown
Attack Vector
NetworkAttack Complexity
LowPrivileges Required
NoneUser Interaction
NoneScope
UnchangedConfidentiality
NoneIntegrity
NoneAvailability
HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS v2.0 Breakdown
Access Vector
NetworkAccess Complexity
MediumAuthentication
NoneConfidentiality
NoneIntegrity
NoneAvailability
CompleteAV:N/AC:M/Au:N/C:N/I:N/A:C
NVD Known Affected Configurations (CPE 2.3)
| Type | Vendor | Product | Version | Update | Edition | Language |
|---|---|---|---|---|---|---|
| Application | Cisco | Adaptive Security Appliance | All | All | All | All |
| Application | Cisco | Secure Firewall Threat Defense | All | All | All | All |
| Application | Cisco | Secure Firewall Threat Defense | All | All | All | All |
Vendor Declared Affected Products
| Source | Vendor | Product | Version | Platforms |
|---|---|---|---|---|
| CNA | Cisco | Cisco Adaptive Security Appliance Software | affected unspecified 6.4.0.13 custom | Not specified |
| CNA | Cisco | Cisco Firepower Threat Defense Software | affected unspecified 6.6.5 custom | Not specified |
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| Cisco Adaptive Security Appliance Software and Firepower Threat Defense Software Web Services Denial of Service Vulnerabilities | af854a3a-2127-422b-91ae-364da2661108 | tools.cisco.com | Vendor Advisory |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
No vendor comments have been submitted for this CVE.
Legacy QID Mappings
- 317087 Cisco Adaptive Security Appliance (ASA) Software Web Services Denial of Service (DoS) Vulnerabilities (cisco-sa-asafdt-webvpn-dos-KSqJAKPA)
- 317093 Cisco Firepower Threat Defense Software Web Services Multiple Vulnerabilities (cisco-sa-asafdt-webvpn-dos-KSqJAKPA)
- 317108 Cisco Firepower Threat Defense (FTD) Software Web Services Denial of Service (DoS) Vulnerabilities (cisco-sa-asafdt-webvpn-dos-KSqJAKPA)