Cisco FTD Software Cryptographic TLS and SSL Driver Denial of Service Vulnerability (cisco-sa-20190710-asa-ftd-dos)

high Nessus Plugin ID 127118
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The remote device is missing a vendor-supplied security patch


According to its self-reported version, Adaptive Security Appliance Software with FirePOWER Services is affected by a vulnerability in the cryptographic driver due to incomplete input validation of a Secure Sockets Layer (SSL) or Transport Layer Security (TLS) ingress packet header. An unauthenticated, remote attacker can exploit this, by sending a crafted TLS/SSL packet to an interface on the targeted device to cause the device to reboot unexpectedly.

Please see the included Cisco BIDs and Cisco Security Advisory for more information.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.


Upgrade to the relevant fixed version referenced in Cisco bug ID CSCvp36425

See Also

Plugin Details

Severity: High

ID: 127118

File Name: cisco-sa-20190710-asa-ftd-dos.nasl

Version: 1.12

Type: local

Family: CISCO

Published: 8/5/2019

Updated: 5/6/2021

Dependencies: cisco_enumerate_firepower.nbin

Risk Information

CVSS Score Source: CVE-2019-1873


Risk Factor: Medium

Score: 4.4


Risk Factor: High

Base Score: 7.8

Temporal Score: 5.8

Vector: AV:N/AC:L/Au:N/C:N/I:N/A:C

Temporal Vector: E:U/RL:OF/RC:C


Risk Factor: High

Base Score: 8.6

Temporal Score: 7.5

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H

Temporal Vector: E:U/RL:O/RC:C

Vulnerability Information

CPE: cpe:/a:cisco:adaptive_security_appliance_software, cpe:/a:cisco:firepower, cpe:/a:cisco:firepower_threat_defense

Required KB Items: installed_sw/Cisco Firepower Threat Defense, Host/Cisco/Firepower

Exploit Ease: No known exploits are available

Patch Publication Date: 7/10/2019

Vulnerability Publication Date: 7/10/2019

Reference Information

CVE: CVE-2019-1873

BID: 109123


CISCO-SA: cisco-sa-20190710-asa-ftd-dos

IAVA: 2019-A-0271

CWE: 400