SB2021092426 - Improper access control in Cisco IOS XE Software

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Main Vulnerability Database SB2021092426

SB2021092426 - Improper access control in Cisco IOS XE Software

Published: September 24, 2021

Security Bulletin ID SB2021092426
CSH Severity
Medium
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Remote access
Highest impact Data manipulation

Breakdown by Severity

Medium 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 vulnerability.


1) Improper access control (CVE-ID: CVE-2021-1625)

CWE-ID: CWE-284 - Improper Access Control

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


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.

References