SB2021092426 - Improper access control in Cisco IOS XE Software
Published: September 24, 2021
Security Bulletin ID
SB2021092426
Severity
Medium
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Data manipulation
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 security vulnerability.
1) Improper access control (CVE-ID: CVE-2021-1625)
The vulnerability allows a remote attacker to gain unauthorized access to otherwise restricted functionality.
The vulnerability exists due to improper access restrictions in the Zone-Based Policy Firewall feature. A remote attacker can send UDP or ICMP flows to inject traffic through the Zone-Based Policy Firewall, leading to traffic being dropped because it is incorrectly classified or incorrect reporting figures being produced by high-speed logging (HSL).
Remediation
Install update from vendor's website.