CVEvulnerability

CVE-2022-20767

7.5 HIGH Published 2022-05-03 Modified 2026-08-11 Official page ↗
Status
Modified
Published
2022-05-03
Last modified
2026-08-11
Assigner
[email protected]
CVSS 3.1 ([email protected])
8.6 HIGH — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
CVSS 3.1 ([email protected])
7.5 HIGH — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS 2.0 ([email protected])
7.8 HIGH — AV:N/AC:L/Au:N/C:N/I:N/A:C
Weaknesses
CWE-399, CWE-770

Description

A vulnerability in the Snort rule evaluation function of Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. The vulnerability is due to improper handling of the DNS reputation enforcement rule. An attacker could exploit this vulnerability by sending crafted UDP packets through an affected device to force a buildup of UDP connections. A successful exploit could allow the attacker to cause traffic that is going through the affected device to be dropped, resulting in a DoS condition. Note: This vulnerability only affects Cisco FTD devices that are running Snort 3.

Affected configurations

• cisco secure firewall threat defense (< 7.0.2) • cisco secure firewall threat defense 7.1.0

Related

Weakness · not in database (1)

Weakness · CWE (1)

  • CWE-770 Allocation of Resources Without Limits or Throttling weakness

References