SB2020100104 - Denial of service in Cisco IOS XE Software for Catalyst 9200 Series Switches
Published: October 1, 2020
Security Bulletin ID
SB2020100104
CSH Severity
Medium
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) Error Handling (CVE-ID: CVE-2020-3510)
CWE-ID: CWE-388 - Error Handling
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:Green
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to insufficient error handling when parsing DNS requests in the Umbrella Connector component. A remote attacker can send a series of malicious DNS requests to an Umbrella Connector client interface and cause a denial of service condition.
Remediation
Install update from vendor's website.