Vulnerability Intelligence Report
Cisco ASA and FTD Denial of Service Vulnerability
CVE-2024-20353
A vulnerability in the management and VPN web servers for Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to cause the device to reload unexpectedly, resulting in a denial of service (DoS) condition. This vulnerability is due to incomplete error checking when parsing an HTTP header. An attacker could exploit this vulnerability by sending a crafted HTTP request to a targeted web server on a device. A successful exploit could allow the attacker to cause a DoS condition when the device reloads.
CISA KEV
SSVC: Active Exploitation
Automatable
CVSS Base Score
8.6
HIGH
Exploitability:3.9
Impact Score:4.0
EPSS Probability:63.27%
Executive Threat Verdict
Evaluating...
Evaluating Threat Landscape...
Assessing known weaponization, exploitation telemetry, and federal advisories.
Attack Surface
—
Authentication
—
Weaponization
—
SSVC Action
—
Weaknesses (CWE)
CWE-835 ↗Loop with Unreachable Exit Condition ('Infinite Loop')
Affected Products & Versions
| Vendor | Product | Affected Versions |
|---|---|---|
| Cisco | Cisco Adaptive Security Appliance (ASA) Software | 9.8.1 (affected), 9.8.1.5 (affected), 9.8.1.7 (affected), 9.8.2 (affected), 9.8.2.8 (affected), 9.8.2.14 (affected), 9.8.2.15 (affected), 9.8.2.17 (affected), 9.8.2.20 (affected), 9.8.2.24 (affected), 9.8.2.26 (affected), 9.8.2.28 (affected), 9.8.2.33 (affected), 9.8.2.35 (affected), 9.8.2.38 (affected), 9.8.3.8 (affected), 9.8.3.11 (affected), 9.8.3.14 (affected), 9.8.3.16 (affected), 9.8.3.18 (affected), 9.8.3.21 (affected), 9.8.3 (affected), 9.8.3.26 (affected), 9.8.3.29 (affected), 9.8.4 (affected), 9.8.4.3 (affected), 9.8.4.7 (affected), 9.8.4.8 (affected), 9.8.4.10 (affected), 9.8.4.12 (affected), 9.8.4.15 (affected), 9.8.4.17 (affected), 9.8.4.25 (affected), 9.8.4.20 (affected), 9.8.4.22 (affected), 9.8.4.26 (affected), 9.8.4.29 (affected), 9.8.4.32 (affected), 9.8.4.33 (affected), 9.8.4.34 (affected), 9.8.4.35 (affected), 9.8.4.39 (affected), 9.8.4.40 (affected), 9.8.4.41 (affected), 9.8.4.43 (affected), 9.8.4.44 (affected), 9.8.4.45 (affected), 9.8.4.46 (affected), 9.8.4.48 (affected), 9.12.1 (affected), 9.12.1.2 (affected), 9.12.1.3 (affected), 9.12.2 (affected), 9.12.2.4 (affected), 9.12.2.5 (affected), 9.12.2.9 (affected), 9.12.3 (affected), 9.12.3.2 (affected), 9.12.3.7 (affected), 9.12.4 (affected), 9.12.3.12 (affected), 9.12.3.9 (affected), 9.12.2.1 (affected), 9.12.4.2 (affected), 9.12.4.4 (affected), 9.12.4.7 (affected), 9.12.4.10 (affected), 9.12.4.13 (affected), 9.12.4.8 (affected), 9.12.4.18 (affected), 9.12.4.24 (affected), 9.12.4.26 (affected), 9.12.4.29 (affected), 9.12.4.30 (affected), 9.12.4.35 (affected), 9.12.4.37 (affected), 9.12.4.38 (affected), 9.12.4.39 (affected), 9.12.4.40 (affected), 9.12.4.41 (affected), 9.12.4.47 (affected), 9.12.4.48 (affected), 9.12.4.50 (affected), 9.12.4.52 (affected), 9.12.4.54 (affected), 9.12.4.55 (affected), 9.12.4.56 (affected), 9.12.4.58 (affected), 9.12.4.62 (affected), 9.12.4.65 (affected), 9.14.1 (affected), 9.14.1.10 (affected), 9.14.1.6 (affected), 9.14.1.15 (affected), 9.14.1.19 (affected), 9.14.1.30 (affected), 9.14.2 (affected), 9.14.2.4 (affected), 9.14.2.8 (affected), 9.14.2.13 (affected), 9.14.2.15 (affected), 9.14.3 (affected), 9.14.3.1 (affected), 9.14.3.9 (affected), 9.14.3.11 (affected), 9.14.3.13 (affected), 9.14.3.18 (affected), 9.14.3.15 (affected), 9.14.4 (affected), 9.14.4.6 (affected), 9.14.4.7 (affected), 9.14.4.12 (affected), 9.14.4.13 (affected), 9.14.4.14 (affected), 9.14.4.15 (affected), 9.14.4.17 (affected), 9.14.4.22 (affected), 9.14.4.23 (affected), 9.15.1 (affected), 9.15.1.7 (affected), 9.15.1.10 (affected), 9.15.1.15 (affected), 9.15.1.16 (affected), 9.15.1.17 (affected), 9.15.1.1 (affected), 9.15.1.21 (affected), 9.16.1 (affected), 9.16.1.28 (affected), 9.16.2 (affected), 9.16.2.3 (affected), 9.16.2.7 (affected), 9.16.2.11 (affected), 9.16.2.13 (affected), 9.16.2.14 (affected), 9.16.3 (affected), 9.16.3.3 (affected), 9.16.3.14 (affected), 9.16.3.15 (affected), 9.16.3.19 (affected), 9.16.3.23 (affected), 9.16.4 (affected), 9.16.4.9 (affected), 9.16.4.14 (affected), 9.16.4.18 (affected), 9.16.4.19 (affected), 9.16.4.27 (affected), 9.16.4.38 (affected), 9.16.4.39 (affected), 9.16.4.42 (affected), 9.16.4.48 (affected), 9.16.4.55 (affected), 9.17.1 (affected), 9.17.1.7 (affected), 9.17.1.9 (affected), 9.17.1.10 (affected), 9.17.1.11 (affected), 9.17.1.13 (affected), 9.17.1.15 (affected), 9.17.1.20 (affected), 9.17.1.30 (affected), 9.17.1.33 (affected), 9.18.1 (affected), 9.18.1.3 (affected), 9.18.2 (affected), 9.18.2.5 (affected), 9.18.2.7 (affected), 9.18.2.8 (affected), 9.18.3 (affected), 9.18.3.39 (affected), 9.18.3.46 (affected), 9.18.3.53 (affected), 9.18.3.55 (affected), 9.18.3.56 (affected), 9.18.4 (affected), 9.18.4.5 (affected), 9.18.4.8 (affected), 9.19.1 (affected), 9.19.1.5 (affected), 9.19.1.9 (affected), 9.19.1.12 (affected), 9.19.1.18 (affected), 9.19.1.22 (affected), 9.19.1.24 (affected), 9.19.1.27 (affected), 9.20.1 (affected), 9.20.1.5 (affected), 9.20.2 (affected) |
| Cisco | Cisco Firepower Threat Defense Software | 6.2.3 (affected), 6.2.3.1 (affected), 6.2.3.2 (affected), 6.2.3.3 (affected), 6.2.3.4 (affected), 6.2.3.5 (affected), 6.2.3.6 (affected), 6.2.3.7 (affected), 6.2.3.8 (affected), 6.2.3.10 (affected), 6.2.3.11 (affected), 6.2.3.9 (affected), 6.2.3.12 (affected), 6.2.3.13 (affected), 6.2.3.14 (affected), 6.2.3.15 (affected), 6.2.3.16 (affected), 6.2.3.17 (affected), 6.2.3.18 (affected), 6.6.0 (affected), 6.6.0.1 (affected), 6.6.1 (affected), 6.6.3 (affected), 6.6.4 (affected), 6.6.5 (affected), 6.6.5.1 (affected), 6.6.5.2 (affected), 6.6.7 (affected), 6.6.7.1 (affected), 6.4.0 (affected), 6.4.0.1 (affected), 6.4.0.3 (affected), 6.4.0.2 (affected), 6.4.0.4 (affected), 6.4.0.5 (affected), 6.4.0.6 (affected), 6.4.0.7 (affected), 6.4.0.8 (affected), 6.4.0.9 (affected), 6.4.0.10 (affected), 6.4.0.11 (affected), 6.4.0.12 (affected), 6.4.0.13 (affected), 6.4.0.14 (affected), 6.4.0.15 (affected), 6.4.0.16 (affected), 6.4.0.17 (affected), 6.7.0 (affected), 6.7.0.1 (affected), 6.7.0.2 (affected), 6.7.0.3 (affected), 7.0.0 (affected), 7.0.0.1 (affected), 7.0.1 (affected), 7.0.1.1 (affected), 7.0.2 (affected), 7.0.2.1 (affected), 7.0.3 (affected), 7.0.4 (affected), 7.0.5 (affected), 7.0.6 (affected), 7.0.6.1 (affected), 7.1.0 (affected), 7.1.0.1 (affected), 7.1.0.2 (affected), 7.1.0.3 (affected), 7.2.0 (affected), 7.2.0.1 (affected), 7.2.1 (affected), 7.2.2 (affected), 7.2.3 (affected), 7.2.4 (affected), 7.2.4.1 (affected), 7.2.5 (affected), 7.2.5.1 (affected), 7.3.0 (affected), 7.3.1 (affected), 7.3.1.1 (affected), 7.4.0 (affected), 7.4.1 (affected) |
References & Technical Advisories
No reference links found.
Threat Intelligence Signals
Identity & Timeline
| Status | PUBLISHED |
| Assigning Authority | Cisco Systems, Inc. · Hosted Service · USA |
| Reserved | 2023-11-08T15:08:07 |
| Published | 2024-04-24T18:15:57 |
| Last Updated | 2025-10-21T23:05:20 |
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