National Vulnerability Database

National Vulnerability Database

National Vulnerability
Database

CVE-2019-1873 Detail

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.

Source:  MITRE
View Analysis Description

Impact

CVSS v3.0 Severity and Metrics:

Base Score: 7.5 HIGH
Vector: AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H (V3.0 legend)
Impact Score: 3.6
Exploitability Score: 3.9


Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): None
Scope (S): Unchanged
Confidentiality (C): None
Integrity (I): None
Availability (A): High

CVSS v2.0 Severity and Metrics:

Base Score: 7.8 HIGH
Vector: (AV:N/AC:L/Au:N/C:N/I:N/A:C) (V2 legend)
Impact Subscore: 6.9
Exploitability Subscore: 10.0


Access Vector (AV): Network
Access Complexity (AC): Low
Authentication (AU): None
Confidentiality (C): None
Integrity (I): None
Availability (A): Complete
Additional Information:
Allows disruption of service

References to Advisories, Solutions, and Tools

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

Technical Details

Vulnerability Type (View All)

  • Uncontrolled Resource Consumption (CWE-400)

Known Affected Software Configurations Switch to CPE 2.3

Configuration 1 ( hide )
 cpe:/o:cisco:asa_5506-x_firmware:9.6%284.16%29
     Show Matching CPE(s)
 cpe:/o:cisco:asa_5506-x_firmware:9.8%283.8%29
     Show Matching CPE(s)
Running on/with
 cpe:/h:cisco:asa_5506-x:-
     Show Matching CPE(s)

Configuration 2 ( hide )
 cpe:/o:cisco:asa_5506h-x_firmware:9.6%284.16%29
     Show Matching CPE(s)
 cpe:/o:cisco:asa_5506h-x_firmware:9.8%283.8%29
     Show Matching CPE(s)
Running on/with
 cpe:/h:cisco:asa_5506h-x:-
     Show Matching CPE(s)

Configuration 3 ( hide )
 cpe:/o:cisco:asa_5506w-x_firmware:9.6%284.16%29
     Show Matching CPE(s)
 cpe:/o:cisco:asa_5506w-x_firmware:9.8%283.8%29
     Show Matching CPE(s)
Running on/with
 cpe:/h:cisco:asa_5506w-x:-
     Show Matching CPE(s)

Configuration 4 ( hide )
 cpe:/o:cisco:asa_5508-x_firmware:9.6%284.16%29
     Show Matching CPE(s)
 cpe:/o:cisco:asa_5508-x_firmware:9.8%283.8%29
     Show Matching CPE(s)
Running on/with
 cpe:/h:cisco:asa_5508-x:-
     Show Matching CPE(s)

Configuration 5 ( hide )
 cpe:/o:cisco:asa_5516-x_firmware:9.6%284.16%29
     Show Matching CPE(s)
 cpe:/o:cisco:asa_5516-x_firmware:9.8%283.8%29
     Show Matching CPE(s)
Running on/with
 cpe:/h:cisco:asa_5516-x:-
     Show Matching CPE(s)


Change History

2 change records found - show changes

Quick Info

CVE Dictionary Entry:
CVE-2019-1873
NVD Published Date:
07/10/2019
NVD Last Modified:
07/18/2019