CVE-2024-20353 KEV
8.6
HIGH · CVSS 3.1 · EPSS 70.7% (pctl 99)
Patch first
On CISA KEV — known exploited in the wild, due 2024-05-01.
Description
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.
Scoring
| CVSS | 8.6 (HIGH, v3.1) |
|---|---|
| Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H |
| EPSS | 70.69% — more likely to be exploited than 99% of all CVEs |
| Weakness | CWE-835 |
| On CISA KEV | yes — remediate by 2024-05-01 |
| Public exploit | none known |
| Published | 2024-04-24 |
| Last modified | 2026-08-11 |
CISA KEV
| Name | Cisco ASA and FTD Denial of Service Vulnerability |
|---|---|
| Added | 2024-04-24 |
| Due | 2024-05-01 |
| Vendor / product | Cisco / Adaptive Security Appliance (ASA) and Firepower Threat Defense (FTD) |
| Ransomware use | none reported |
Affected (2)
| Vendor | Product |
|---|---|
| cisco | adaptive security appliance software |
| cisco | secure firewall threat defense |
References
- https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-asaftd-websrvs-dos-X8gNucD2
- https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-asaftd-websrvs-dos-X8gNucD2
- https://blog.talosintelligence.com/arcanedoor-new-espionage-focused-campaign-found-targeting-perimeter-network-devices/
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2024-20353
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