CVE-2024-20493
Last modified
CVE-2024-20493 is a medium-severity vulnerability rated 5.3/10 on the CVSS scale. A vulnerability in the login authentication functionality of the Remote Access SSL VPN feature of Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to deny further VPN user authentications for several minutes, resulting in a temporary denial of service (DoS) condition. This vulnerability is due to ineffective handling of memory resources during the authentication process. An attacker could exploit this vulnerability by sending crafted packets, which could cause resource exhaustion of the authentication process. EPSS estimates a 0.55% chance of exploitation in the next 30 days.
Description
A vulnerability in the login authentication functionality of the Remote Access SSL VPN feature of Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to deny further VPN user authentications for several minutes, resulting in a temporary denial of service (DoS) condition. This vulnerability is due to ineffective handling of memory resources during the authentication process. An attacker could exploit this vulnerability by sending crafted packets, which could cause resource exhaustion of the authentication process. A successful exploit could allow the attacker to deny authentication for Remote Access SSL VPN users for several minutes, resulting in a temporary DoS condition.
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Cisco | Secure Firewall Threat Defense | 6.2.3 |
| Cisco | Secure Firewall Threat Defense | 6.2.3.1 |
| Cisco | Secure Firewall Threat Defense | 6.2.3.2 |
| Cisco | Secure Firewall Threat Defense | 6.2.3.3 |
| Cisco | Secure Firewall Threat Defense | 6.2.3.4 |
| Cisco | Secure Firewall Threat Defense | 6.2.3.5 |
| Cisco | Secure Firewall Threat Defense | 6.2.3.6 |
| Cisco | Secure Firewall Threat Defense | 6.2.3.7 |
| Cisco | Secure Firewall Threat Defense | 6.2.3.8 |
| Cisco | Secure Firewall Threat Defense | 6.2.3.9 |
| Cisco | Secure Firewall Threat Defense | 6.2.3.10 |
| Cisco | Secure Firewall Threat Defense | 6.2.3.11 |
| Cisco | Secure Firewall Threat Defense | 6.2.3.12 |
| Cisco | Secure Firewall Threat Defense | 6.2.3.13 |
| Cisco | Secure Firewall Threat Defense | 6.2.3.14 |
| Cisco | Secure Firewall Threat Defense | 6.2.3.15 |
| Cisco | Secure Firewall Threat Defense | 6.2.3.16 |
| Cisco | Secure Firewall Threat Defense | 6.2.3.17 |
| Cisco | Secure Firewall Threat Defense | 6.2.3.18 |
| Cisco | Secure Firewall Threat Defense | 6.4.0 |
| Cisco | Secure Firewall Threat Defense | 6.4.0.1 |
| Cisco | Secure Firewall Threat Defense | 6.4.0.2 |
| Cisco | Secure Firewall Threat Defense | 6.4.0.3 |
| Cisco | Secure Firewall Threat Defense | 6.4.0.4 |
| Cisco | Secure Firewall Threat Defense | 6.4.0.5 |
| Cisco | Secure Firewall Threat Defense | 6.4.0.6 |
| Cisco | Secure Firewall Threat Defense | 6.4.0.7 |
| Cisco | Secure Firewall Threat Defense | 6.4.0.8 |
| Cisco | Secure Firewall Threat Defense | 6.4.0.9 |
| Cisco | Secure Firewall Threat Defense | 6.4.0.10 |
| Cisco | Secure Firewall Threat Defense | 6.4.0.11 |
| Cisco | Secure Firewall Threat Defense | 6.4.0.12 |
| Cisco | Secure Firewall Threat Defense | 6.4.0.13 |
| Cisco | Secure Firewall Threat Defense | 6.4.0.14 |
| Cisco | Secure Firewall Threat Defense | 6.4.0.15 |
| Cisco | Secure Firewall Threat Defense | 6.4.0.16 |
| Cisco | Secure Firewall Threat Defense | 6.4.0.17 |
| Cisco | Secure Firewall Threat Defense | 6.4.0.18 |
| Cisco | Secure Firewall Threat Defense | 6.6.0 |
| Cisco | Secure Firewall Threat Defense | 6.6.0.1 |
| Cisco | Secure Firewall Threat Defense | 6.6.1 |
| Cisco | Secure Firewall Threat Defense | 6.6.3 |
| Cisco | Secure Firewall Threat Defense | 6.6.4 |
| Cisco | Secure Firewall Threat Defense | 6.6.5 |
| Cisco | Secure Firewall Threat Defense | 6.6.5.1 |
| Cisco | Secure Firewall Threat Defense | 6.6.5.2 |
| Cisco | Secure Firewall Threat Defense | 6.6.7 |
| Cisco | Secure Firewall Threat Defense | 6.6.7.1 |
| Cisco | Secure Firewall Threat Defense | 6.6.7.2 |
| Cisco | Secure Firewall Threat Defense | 6.7.0 |
Showing 50 of 294 affected configurations. See NVD for the full list.
References
Timeline
- Published
- Last Modified
- Status
- Analyzed
Frequently Asked Questions
What is CVE-2024-20493?
How severe is CVE-2024-20493?
How do I fix CVE-2024-20493?
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-2024-20488A vulnerability in the web-based management interface of Cis…6.1
- 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-2024-20494A vulnerability in the TLS cryptography functionality of Cis…8.6
- 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
Are you affected by CVE-2024-20493?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST