CVE-2024-20494

HIGH EPSS 40.1%
Published Oct 23, 20241y ago · Modified Jun 17, 20261w ago
8.6 CVSS 3.1
High
Find Similar
Published Oct 23, 2024 1y ago
Last Modified Jun 17, 2026 1w ago

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).

CVSS Details

Base Score
8.6
Exploitability
3.9
Impact
4.0
Vector string
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope Changed
Confidentiality None
Integrity None
Availability High

Threat Intelligence

EPSS Exploit Probability
40.1% percentile
Exploit & Patch Status
No Known Exploit
No Patch Available

Weaknesses 1

CWE-1287

Affected Products 25

VendorProductVersionRange
ciscoadaptive_security_appliance_software9.19.1any
ciscoadaptive_security_appliance_software9.19.1.5any
ciscoadaptive_security_appliance_software9.19.1.9any
ciscoadaptive_security_appliance_software9.19.1.12any
ciscoadaptive_security_appliance_software9.19.1.18any
ciscoadaptive_security_appliance_software9.19.1.22any
ciscoadaptive_security_appliance_software9.19.1.24any
ciscoadaptive_security_appliance_software9.19.1.27any
ciscoadaptive_security_appliance_software9.19.1.28any
ciscoadaptive_security_appliance_software9.19.1.31any
ciscoadaptive_security_appliance_software9.20.1any
ciscoadaptive_security_appliance_software9.20.1.5any
ciscoadaptive_security_appliance_software9.20.2any
ciscoadaptive_security_appliance_software9.20.2.10any
ciscoadaptive_security_appliance_software9.20.2.21any
ciscoadaptive_security_appliance_software9.20.2.22any
ciscoadaptive_security_appliance_software9.20.3any
ciscofirepower_threat_defense7.3.0any
ciscofirepower_threat_defense7.3.1any
ciscofirepower_threat_defense7.3.1.1any
ciscofirepower_threat_defense7.3.1.2any
ciscofirepower_threat_defense7.4.0any
ciscofirepower_threat_defense7.4.1any
ciscofirepower_threat_defense7.4.1.1any
ciscofirepower_threat_defense7.4.2any

References 1

  • sec.cloudapps.cisco.com https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-asa-tls-CWY6zXB
    MitigationVendor Advisory

Remediation

No remediation data recorded yet

Check vendor advisories and the NVD entry for patch availability.