VulnerabilityModified

CVE-2019-1873

HIGH 8.6EPSS 2.46%

Does this matter?

High impact if exploited, but EPSS currently rates exploitation as unlikely (2.46%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.

Description

A vulnerability in the cryptographic driver for Cisco Adaptive Security Appliance Software (ASA) and Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to cause the device to reboot unexpectedly. The vulnerability is due to incomplete input validation of a Secure Sockets Layer (SSL) or Transport Layer Security (TLS) ingress packet header. An attacker could exploit this vulnerability by sending a crafted TLS/SSL packet to an interface on the targeted device. An exploit could allow the attacker to cause the device to reload, which will result in a denial of service (DoS) condition. Note: Only traffic directed to the affected system can be used to exploit this vulnerability. This vulnerability affects systems configured in routed and transparent firewall mode and in single or multiple context mode. This vulnerability can be triggered by IPv4 and IPv6 traffic. A valid SSL or TLS session is required to exploit this vulnerability.

CVSS 3.1: 8.6 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
EPSS: 2.46% probability · 84th percentile
CISA KEV: Not listed
Weakness: CWE-400, CWE-20
Affected: cisco/asa 5506-x firmware · cisco/asa 5506h-x firmware · cisco/asa 5506w-x firmware · cisco/asa 5508-x firmware · cisco/asa 5516-x firmware
Source: psirt@cisco.com

References

http://www.securityfocus.com/bid/109123Third Party Advisory, VDB Entry
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190710-asa-ftd-dosVendor Advisory
http://www.securityfocus.com/bid/109123Third Party Advisory, VDB Entry
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190710-asa-ftd-dosVendor Advisory

Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.