Vulnerability · Published May 3, 2022 · Assigned by cisco

CVE-2022-20746Cisco Firepower Threat Defense Software TCP Proxy Denial of Service Vulnerability

High 8.6

In plain English

A high-severity null pointer dereference in Cisco Firepower Threat Defense Software from Cisco. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 1.4% (higher than 72% of all known vulnerabilities).

Severity (CVSS 3.1)8.6High

Exploit odds (30 days)1.4%top 28.2% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

A vulnerability in the TCP proxy functionality of Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to trigger a denial of service (DoS) condition. This vulnerability is due to improper handling of TCP flows. An attacker could exploit this vulnerability by sending a crafted stream of TCP traffic through an affected device. A successful exploit could allow the attacker to cause the device to reload, resulting in a DoS condition.

Affected products (as reported)

Vendor	Product	Versions
Cisco	Cisco Firepower Threat Defense Software	n/a

Weakness: CWE-476 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H

References

20220427 Cisco Firepower Threat Defense Software TCP Proxy Denial of Service Vulnerability vendor-advisory, x_refsource_CISCO