CVE-2021-1625

Description

A vulnerability in the Zone-Based Policy Firewall feature of Cisco IOS XE Software could allow an unauthenticated, remote attacker to prevent the Zone-Based Policy Firewall from correctly classifying traffic. This vulnerability exists because ICMP and UDP responder-to-initiator flows are not inspected when the Zone-Based Policy Firewall has either Unified Threat Defense (UTD) or Application Quality of Experience (AppQoE) configured. An attacker could exploit this vulnerability by attempting to send UDP or ICMP flows through the network. A successful exploit could allow the attacker to inject traffic through the Zone-Based Policy Firewall, resulting in traffic being dropped because it is incorrectly classified or in incorrect reporting figures being produced by high-speed logging (HSL).

Risk Information

Base Score

5.8

MODERATE

Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N

EPSS Score

Exploitation Probability

0.387

Associated Vulnerability

Vulnerability	OS Platform
Cisco IOS XE Software Zone-Based Policy Firewall ICMP and UDP Inspection Vulnerability For Cisco IOS XE SD-WAN Software	NCM
Cisco IOS XE Software Zone-Based Policy Firewall ICMP and UDP Inspection Vulnerability For Cisco IOS XE Software	NCM
CVE-2021-1625	NCM

Patch Details

Click to see the patches provided by ManageEngine for this CVE

Patch ID	Patch Description
PATCH-1706092	Security Update for Cisco IOS XE SD-WAN Software sdwan-20.6(999.751)
PATCH-1706107	Security Update for Cisco IOS XE Software 5.2(1)SV5(1.3a)

References

https://nvd.nist.gov/vuln/detail/CVE-2023-1234
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-1234