QID 317062

Date Published: 2021-09-27

QID 317062: Cisco Internetwork Operating System (IOS XE) Software Zone-Based Policy Firewall ICMP and UDP Inspection Vulnerability (cisco-sa-zbfw-pP9jfzwL)

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.

Affected Products
Cisco IOS XE Software if it had either of the following combinations of features enabled:
Zone-Based Policy Firewall with UTD (either the Snort intrusion prevention system [IPS] or web URL filtering)
Zone-Based Policy Firewall with AppQoE
Note: Potential detection as cannot determine vulnerable configurations.

QID Detection Logic (Authenticated):
The check matches Cisco IOS XE version retrieved via Unix Auth using "show version" command.
QID Detection Logic (Unauthenticated):
The check matches Cisco IOS XE version retrieved via SNMP or TCP/IP Fingerprint or NTP or Telnet.

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).

CVSS V3 rated as Medium - 5.8 severity.

CVSS V2 rated as Medium - 4.3 severity.

Solution

Customers are advised to refer to cisco-sa-zbfw-pP9jfzwL for more information.

Vendor References

cisco-sa-zbfw-pP9jfzwL - tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-zbfw-pP9jfzwL

CVEs related to QID 317062

CVE-2021-1625 |

Software Advisories

Advisory ID	Software	Component	Link
cisco-sa-zbfw-pP9jfzwL			tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-zbfw-pP9jfzwL

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