SB2022041411 - Denial of service in Cisco IOS XE Software for Catalyst 9800 Series Wireless Controllers
Published: April 14, 2022
Security Bulletin ID
SB2022041411
CSH Severity
High
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Buffer Underwrite ('Buffer Underflow') (CVE-ID: CVE-2022-20683)
CWE-ID: CWE-124 - Buffer Underwrite ('Buffer Underflow')
CVSSv4: 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
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to insufficient packet verification for traffic inspected in the Application Visibility and Control (AVC-FNF) feature . A remote attacker can send a specially crafted packet, trigger memory corruption and cause a denial of service condition on the target system.
Remediation
Install update from vendor's website.