Vulnerability in Cisco Adaptive Security Appliance Software
CVE-2024-20493
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L.
EPSS exploit prediction
EPSS: 0.005 (44.0th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 44th percentile — 44.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.005 · newest: 0.005 · change: 0.000
Affected products
- Cisco Adaptive Security Appliance Software — versions 9.8.1, 9.8.1.5, 9.8.1.7
- Cisco Adaptive Security Appliance (Asa) Software — versions 9.8.1, 9.8.1.5, 9.8.1.7
- Cisco Firepower Threat Defense Software — versions 6.2.3, 6.2.3.1, 6.2.3.2
- Cisco Firepower Threat Defense Software — versions 6.2.3, 6.2.3.1, 6.2.3.2
- Cisco Secure Firewall Threat Defense — versions 6.2.3, 6.2.3.1, 6.2.3.2
Weakness classification (CWE)
References
Frequently asked questions
- What is CVE-2024-20493?
- CVE-2024-20493 is a medium-severity vulnerability in Cisco Adaptive Security Appliance Software, classified under Missing Release of Resource after Effective Lifetime. CVSS score: 5.3/10. Published 2024-10-23.
- How severe is CVE-2024-20493?
- Medium severity. CVSS v3 base score is 5.3 out of 10.