Vulnerability in Cisco Adaptive Security Appliance Software
CVE-2024-20494
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).
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.6 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.005 (42.8th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 43rd percentile — 42.8% 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 9.19.1, 9.19.1.5, 9.19.1.9
- Cisco Adaptive Security Appliance (Asa) Software — versions 9.19.1, 9.19.1.5, 9.19.1.9
- Cisco Firepower Threat Defense Software — versions 7.3.0, 7.3.1, 7.3.1.1
- Cisco Firepower Threat Defense — versions 7.3.0, 7.3.1, 7.3.1.1
- Cisco Secure Firewall Threat Defense — versions 7.3.0, 7.3.1, 7.3.1.1
Weakness classification (CWE)
References
- sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-… (Mitigation, Vendor Advisory)
Frequently asked questions
- What is CVE-2024-20494?
- CVE-2024-20494 is a high-severity vulnerability in Cisco Adaptive Security Appliance Software, classified under CWE-1287. CVSS score: 8.6/10. Published 2024-10-23.
- How severe is CVE-2024-20494?
- High severity. CVSS v3 base score is 8.6 out of 10.