CVE-2024-20494
Last modified
CVE-2024-20494 is a high-severity vulnerability rated 8.6/10 on the CVSS scale. A vulnerability in the TLS cryptography functionality of 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 improper data validation during the TLS 1.3 handshake. An attacker could exploit this vulnerability by sending a crafted TLS 1.3 packet to an affected system through a TLS 1.3-enabled listening socket. EPSS estimates a 0.51% chance of exploitation in the next 30 days.
Description
A vulnerability in the TLS cryptography functionality of 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 improper data validation during the TLS 1.3 handshake. An attacker could exploit this vulnerability by sending a crafted TLS 1.3 packet to an affected system through a TLS 1.3-enabled listening socket. A successful exploit could allow the attacker to cause the device to reload, resulting in a DoS condition. Note: This vulnerability can also impact the integrity of a device by causing VPN HostScan communication failures or file transfer failures when Cisco ASA Software is upgraded using Cisco Adaptive Security Device Manager (ASDM).
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Cisco | Adaptive Security Appliance Software | 9.19.1 |
| Cisco | Adaptive Security Appliance Software | 9.19.1.5 |
| Cisco | Adaptive Security Appliance Software | 9.19.1.9 |
| Cisco | Adaptive Security Appliance Software | 9.19.1.12 |
| Cisco | Adaptive Security Appliance Software | 9.19.1.18 |
| Cisco | Adaptive Security Appliance Software | 9.19.1.22 |
| Cisco | Adaptive Security Appliance Software | 9.19.1.24 |
| Cisco | Adaptive Security Appliance Software | 9.19.1.27 |
| Cisco | Adaptive Security Appliance Software | 9.19.1.28 |
| Cisco | Adaptive Security Appliance Software | 9.19.1.31 |
| Cisco | Adaptive Security Appliance Software | 9.20.1 |
| Cisco | Adaptive Security Appliance Software | 9.20.1.5 |
| Cisco | Adaptive Security Appliance Software | 9.20.2 |
| Cisco | Adaptive Security Appliance Software | 9.20.2.10 |
| Cisco | Adaptive Security Appliance Software | 9.20.2.21 |
| Cisco | Adaptive Security Appliance Software | 9.20.2.22 |
| Cisco | Adaptive Security Appliance Software | 9.20.3 |
| Cisco | Firepower Threat Defense | 7.3.0 |
| Cisco | Firepower Threat Defense | 7.3.1 |
| Cisco | Firepower Threat Defense | 7.3.1.1 |
| Cisco | Firepower Threat Defense | 7.3.1.2 |
| Cisco | Firepower Threat Defense | 7.4.0 |
| Cisco | Firepower Threat Defense | 7.4.1 |
| Cisco | Firepower Threat Defense | 7.4.1.1 |
| Cisco | Firepower Threat Defense | 7.4.2 |
References
- https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-asa-tls-CWY6zXBMitigation, Vendor Advisory
Timeline
- Published
- Last Modified
- Status
- Analyzed
Frequently Asked Questions
What is CVE-2024-20494?
How severe is CVE-2024-20494?
How do I fix CVE-2024-20494?
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
Related CVEs from 2024
- CVE-2024-20489A vulnerability in the storage method of the PON Controller …5.5
- CVE-2024-2049Server-Side Request Forgery (SSRF) in Citrix SD-WAN Standard…5.3
- CVE-2024-20490A vulnerability in a logging function of Cisco Nexus Dashboa…8.6
- CVE-2024-20491A vulnerability in a logging function of Cisco Nexus Dashboa…8.6
- CVE-2024-20492A vulnerability in the restricted shell of Cisco Expressway …6.7
- CVE-2024-20493A vulnerability in the login authentication functionality of…5.3
- CVE-2024-20495A vulnerability in the Remote Access VPN feature of Cisco Ad…8.6
- CVE-2024-20496A vulnerability in the UDP packet validation code of Cisco S…6.1
- CVE-2024-20497A vulnerability in Cisco Expressway Edge (Expressway-E) coul…4.3
- CVE-2024-20498Multiple vulnerabilities in the Cisco AnyConnect VPN server …7.5
- CVE-2024-20499Multiple vulnerabilities in the Cisco AnyConnect VPN server …7.5
- CVE-2024-2050 CWE-79: Improper Neutralization of Input During Web Page Ge…8.2
Are you affected by CVE-2024-20494?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST