Improper Handling of Length Parameter Inconsistency in Cisco Systems, Inc products - CVE-2022-20870

Vulnerability identifier: #VU67735

CSH Severity: High

CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber

CVE-ID: CVE-2022-20870

CWE-ID: CWE-130

Exploitation vector: Remote access

Exploit availability: No public exploit available

Vulnerable software:
Cisco IOS XE
Catalyst 3650 Series Switches
Catalyst 3850 Series Switches
Catalyst 9300 Series Switches
Catalyst 9400 Series Switches
Catalyst 9500 Series Switches
Catalyst 9600 Series Switches

Software vendor:
Cisco Systems, Inc

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to insufficient input validation of IPv4 traffic in the egress MPLS packet processing function. A remote attacker can pass specially crafted input to the application and perform a denial of service (DoS) attack.

Install updates from vendor's website.

• https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-iosxe-mpls-dos-Ab4OUL3