CVE-2024-20494: firepower threat — Fix

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).

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CVSS v3.1 Score

8.6

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H

Weakness Type (CWE)

CWE-1287 CWE-1287

Affected Products

Vendor	Product	Versions
cisco	adaptive_security_appliance_software	All
cisco	adaptive_security_appliance_software	All
cisco	adaptive_security_appliance_software	All
cisco	adaptive_security_appliance_software	All
cisco	adaptive_security_appliance_software	All
cisco	adaptive_security_appliance_software	All
cisco	adaptive_security_appliance_software	All
cisco	adaptive_security_appliance_software	All
cisco	adaptive_security_appliance_software	All
cisco	adaptive_security_appliance_software	All
cisco	adaptive_security_appliance_software	All
cisco	adaptive_security_appliance_software	All
cisco	adaptive_security_appliance_software	All
cisco	adaptive_security_appliance_software	All
cisco	adaptive_security_appliance_software	All
cisco	adaptive_security_appliance_software	All
cisco	adaptive_security_appliance_software	All
cisco	firepower_threat_defense	All
cisco	firepower_threat_defense	All
cisco	firepower_threat_defense	All
cisco	firepower_threat_defense	All
cisco	firepower_threat_defense	All
cisco	firepower_threat_defense	All
cisco	firepower_threat_defense	All
cisco	firepower_threat_defense	All

References

Advisories & Patches

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

Frequently Asked Questions

What is 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). It has a CVSS v3.1 base score of 8.6 (HIGH).

How severe is CVE-2024-20494? +

CVE-2024-20494 has a CVSS v3.1 score of 8.6 out of 10, rated HIGH. This is a high-severity vulnerability that should be prioritized for patching.

What products are affected by CVE-2024-20494? +

CVE-2024-20494 affects products from cisco, specifically: adaptive_security_appliance_software, firepower_threat_defense. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2024-20494? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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CVE-2024-20494