CVE-2019-1873

Current 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.

Basic Data

Published	July 10, 2019
Last Modified	October 09, 2019
Assigner	cve@mitre.org
Data Type	CVE
Data Format	MITRE
Data Version	4.0
Problem Type	CWE-400
CVE Data Version	4.0

Base Metric V2

CVSS 2 - Version	2.0
CVSS 2 - Vector String	AV:N/AC:L/Au:N/C:N/I:N/A:C
CVSS 2 - Access Vector	NETWORK
CVSS 2 - Access Complexity	LOW
CVSS 2 - Authentication	NONE
CVSS 2 - Confidentiality Impact	NONE
CVSS 2 - Availability Impact	COMPLETE
CVSS 2 - Base Score	7.8
Severity	HIGH
Exploitability Score	10.0
Impact Score	6.9
Obtain All Privilege	false
Obtain User Privilege	false
Obtain Other Privilege	false

Base Metric V3

CVSS 3 - Version	3.0
CVSS 3 - Vector String	CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS 3 - Attack Vector	NETWORK
CVSS 3 - Attack Complexity	LOW
CVSS 3 - Privileges Required	NONE
CVSS 3 - User Interaction	NONE
CVSS 3 - Scope	UNCHANGED
CVSS 3 - Confidentiality Impact	NONE
CVSS 3 - Integrity Impact	NONE
CVSS 3 - Availability Impact	HIGH
CVSS 3 - Base Score	7.5
CVSS 3 - Base Severity	HIGH
Exploitability Score	3.9
Base Severity	HIGH

Configurations

AND

OR - Configuration 1

Cpe Version	Part	Vendor	Product	Version	Update	Edition	Language	SW Edition	Target SW	Target HW	Other	Version Start Including	Version End Including	Version Start Excluding	Version End Excluding
2.3	OS	Cisco	Asa 5506-x Firmware	9.6(4.16)	*	*	*	*	*	*	*
2.3	OS	Cisco	Asa 5506-x Firmware	9.8(3.8)	*	*	*	*	*	*	*

OR Running on/with:

Cpe Version	Part	Vendor	Product	Version	Update	Edition	Language	SW Edition	Target SW	Target HW	Other	Version Start Including	Version End Including	Version Start Excluding	Version End Excluding
2.3	Hardware	Cisco	Asa 5506-x	-	*	*	*	*	*	*	*

AND

OR - Configuration 2

Cpe Version	Part	Vendor	Product	Version	Update	Edition	Language	SW Edition	Target SW	Target HW	Other	Version Start Including	Version End Including	Version Start Excluding	Version End Excluding
2.3	OS	Cisco	Asa 5506h-x Firmware	9.6(4.16)	*	*	*	*	*	*	*
2.3	OS	Cisco	Asa 5506h-x Firmware	9.8(3.8)	*	*	*	*	*	*	*

OR Running on/with:

Cpe Version	Part	Vendor	Product	Version	Update	Edition	Language	SW Edition	Target SW	Target HW	Other	Version Start Including	Version End Including	Version Start Excluding	Version End Excluding
2.3	Hardware	Cisco	Asa 5506h-x	-	*	*	*	*	*	*	*

AND

OR - Configuration 3

Cpe Version	Part	Vendor	Product	Version	Update	Edition	Language	SW Edition	Target SW	Target HW	Other	Version Start Including	Version End Including	Version Start Excluding	Version End Excluding
2.3	OS	Cisco	Asa 5506w-x Firmware	9.6(4.16)	*	*	*	*	*	*	*
2.3	OS	Cisco	Asa 5506w-x Firmware	9.8(3.8)	*	*	*	*	*	*	*

OR Running on/with:

Cpe Version	Part	Vendor	Product	Version	Update	Edition	Language	SW Edition	Target SW	Target HW	Other	Version Start Including	Version End Including	Version Start Excluding	Version End Excluding
2.3	Hardware	Cisco	Asa 5506w-x	-	*	*	*	*	*	*	*

AND

OR - Configuration 4

Cpe Version	Part	Vendor	Product	Version	Update	Edition	Language	SW Edition	Target SW	Target HW	Other	Version Start Including	Version End Including	Version Start Excluding	Version End Excluding
2.3	OS	Cisco	Asa 5508-x Firmware	9.6(4.16)	*	*	*	*	*	*	*
2.3	OS	Cisco	Asa 5508-x Firmware	9.8(3.8)	*	*	*	*	*	*	*

OR Running on/with:

Cpe Version	Part	Vendor	Product	Version	Update	Edition	Language	SW Edition	Target SW	Target HW	Other	Version Start Including	Version End Including	Version Start Excluding	Version End Excluding
2.3	Hardware	Cisco	Asa 5508-x	-	*	*	*	*	*	*	*

AND

OR - Configuration 5

Cpe Version	Part	Vendor	Product	Version	Update	Edition	Language	SW Edition	Target SW	Target HW	Other	Version Start Including	Version End Including	Version Start Excluding	Version End Excluding
2.3	OS	Cisco	Asa 5516-x Firmware	9.6(4.16)	*	*	*	*	*	*	*
2.3	OS	Cisco	Asa 5516-x Firmware	9.8(3.8)	*	*	*	*	*	*	*

OR Running on/with:

Cpe Version	Part	Vendor	Product	Version	Update	Edition	Language	SW Edition	Target SW	Target HW	Other	Version Start Including	Version End Including	Version Start Excluding	Version End Excluding
2.3	Hardware	Cisco	Asa 5516-x	-	*	*	*	*	*	*	*

Vulnerable Software List

Vendor	Product	Versions
Cisco	Asa 5508-x Firmware	9.6(4.16), 9.8(3.8)
Cisco	Asa 5516-x Firmware	9.6(4.16), 9.8(3.8)
Cisco	Asa 5506-x Firmware	9.6(4.16), 9.8(3.8)
Cisco	Asa 5506h-x Firmware	9.6(4.16), 9.8(3.8)
Cisco	Asa 5506w-x Firmware	9.6(4.16), 9.8(3.8)

References

Name	Source	URL	Tags
109123	http://www.securityfocus.com/bid/109123	BID	Third Party Advisory VDB Entry
20190710 Cisco ASA and FTD Software Cryptographic TLS and SSL Driver Denial of Service Vulnerability	https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190710-asa-ftd-dos	CISCO	Vendor Advisory