Resource exhaustion in Cisco Adaptive Security Appliance (ASA) and Cisco Firewall Threat Defense (FTD) - CVE-2019-1873
Published: July 16, 2019 / Updated: July 18, 2019
Vulnerability identifier: #VU19190
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2019-1873
CWE-ID: CWE-400
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: Cisco Systems, Inc
Affected software:
Cisco Adaptive Security Appliance (ASA)
Cisco Firewall Threat Defense (FTD)
Cisco Adaptive Security Appliance (ASA)
Cisco Firewall Threat Defense (FTD)
Detailed vulnerability description
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to incomplete input validation of a Secure Sockets Layer (SSL) or Transport Layer Security (TLS) ingress packet header. A remote attacker can send a specially crafted TLS/SSL packet to an interface on the targeted device, cause the device to reload and perform a denial of service (DoS) attack.
This vulnerability affects the following products if they are running a vulnerable release of Cisco ASA Software or FTD Software:
- ASA 5506-X
- ASA 5506-X with FirePOWER Services
- ASA 5506H-X
- ASA 5506H-X with FirePOWER Services
- ASA 5506W-X
- ASA 5506W-X with FirePOWER Services
- ASA 5508-X
- ASA 5508-X with FirePOWER Services
- ASA 5516-X
- ASA 5516-X with FirePOWER Services
How to mitigate CVE-2019-1873
Install updates from vendor's website.