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7.5highHigh

CVE-2019-1687

Cisco Adaptive Security Appliance Software

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.

Exploitation status

  • A vendor advisory or patch reference has been published.

What the metrics mean

  • It is reachable over a network, without needing local access.
  • For an attacker who can reach it, no special conditions are needed to exploit it.
  • To exploit it, no account is needed.
  • Beyond that, no action by a user is required.

Scoring

CVSS
7.5 (v3.1)
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness
CWE-20
Assigned by
psirt@cisco.com

Dates

Published
2019-05-03
Last modified
2026-08-11
Sources
NVD

Affected products

  • Cisco Adaptive Security Appliance Software- 9.4.4.34, 9.5 - 9.6.4.25, 9.7 - 9.8.4, 9.9 - 9.9.2.50, 9.10 - 9.10.1.17
  • Cisco Asa 5505all versions
  • Cisco Asa 5510all versions
  • Cisco Asa 5512-Xall versions
  • Cisco Asa 5515-Xall versions
  • Cisco Asa 5520all versions
  • Cisco Asa 5525-Xall versions
  • Cisco Asa 5540all versions
  • Cisco Asa 5545-Xall versions
  • Cisco Asa 5550all versions
  • Cisco Asa 5555-Xall versions
  • Cisco Asa 5580all versions

As listed in the NVD configuration data. Not a statement about your estate.

References