CVE-2019-1687

high Cisco
CVSS v3 Base Score
7.5
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS Score
2.9%
Exploitation probability in 30 days
Top 14% most likely to be exploited
Attack Characteristics
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Confidentiality
None
Integrity
None
Availability
High
Published: May 3, 2019 (2683 days ago)
Last Modified: August 11, 2026
Vendor: Cisco
Source: NVD

Description

A vulnerability in the TCP proxy functionality for Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to cause the device to restart unexpectedly, resulting in a denial of service (DoS) condition. The vulnerability is due to an error in TCP-based packet inspection, which could cause the TCP packet to have an invalid Layer 2 (L2)-formatted header. An attacker could exploit this vulnerability by sending a crafted TCP packet sequence to the targeted device. A successful exploit could allow the attacker to cause a DoS condition.

CWE

CWE-20

Affected Products

cisco adaptive security appliance softwarecisco secure firewall threat defense

References

🔗 www.securityfocus.com 🔗 tools.cisco.com 🔗 www.securityfocus.com 🔗 tools.cisco.com