Vulnerability Details : CVE-2019-1873
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.
Vulnerability category: Input validationDenial of service
Exploit prediction scoring system (EPSS) score for CVE-2019-1873
Probability of exploitation activity in the next 30 days: 0.16%
Percentile, the proportion of vulnerabilities that are scored at or less: ~ 51 % EPSS Score History EPSS FAQ
CVSS scores for CVE-2019-1873
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source |
|---|---|---|---|---|---|
|
7.8
|
HIGH | AV:N/AC:L/Au:N/C:N/I:N/A:C |
10.0
|
6.9
|
NIST |
|
8.6
|
HIGH | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H |
3.9
|
4.0
|
Cisco Systems, Inc. |
|
8.6
|
HIGH | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H |
3.9
|
4.0
|
NIST |
CWE ids for CVE-2019-1873
-
The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.Assigned by: nvd@nist.gov (Primary)
-
The product does not properly control the allocation and maintenance of a limited resource, thereby enabling an actor to influence the amount of resources consumed, eventually leading to the exhaustion of available resources.Assigned by: ykramarz@cisco.com (Secondary)
References for CVE-2019-1873
-
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190710-asa-ftd-dos
Cisco ASA and FTD Software Cryptographic TLS and SSL Driver Denial of Service VulnerabilityVendor Advisory
-
http://www.securityfocus.com/bid/109123
Cisco ASA Software and FTD Software CVE-2019-1873 Denial of Service VulnerabilityThird Party Advisory;VDB Entry
Products affected by CVE-2019-1873
- cpe:2.3:o:cisco:asa_5506-x_firmware:9.6\(4.16\):*:*:*:*:*:*:*
- cpe:2.3:o:cisco:asa_5506-x_firmware:9.8\(3.8\):*:*:*:*:*:*:*
- cpe:2.3:o:cisco:asa_5506h-x_firmware:9.6\(4.16\):*:*:*:*:*:*:*
- cpe:2.3:o:cisco:asa_5506h-x_firmware:9.8\(3.8\):*:*:*:*:*:*:*
- cpe:2.3:o:cisco:asa_5506w-x_firmware:9.8\(3.8\):*:*:*:*:*:*:*
- cpe:2.3:o:cisco:asa_5506w-x_firmware:9.6\(4.16\):*:*:*:*:*:*:*
- cpe:2.3:o:cisco:asa_5508-x_firmware:9.6\(4.16\):*:*:*:*:*:*:*
- cpe:2.3:o:cisco:asa_5508-x_firmware:9.8\(3.8\):*:*:*:*:*:*:*
- cpe:2.3:o:cisco:asa_5516-x_firmware:9.6\(4.16\):*:*:*:*:*:*:*
- cpe:2.3:o:cisco:asa_5516-x_firmware:9.8\(3.8\):*:*:*:*:*:*:*