PT-2020-4177 · Cisco · Cisco Ios Xe

Priyanka Bansal · Published 2020-09-24 · Updated 2020-10-08 · CVE-2020-3510

Positive Technologies (AI Summary)

CVSS v3.1

8.6

High

Base vector

AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H

Name of the Vulnerable Software and Affected Versions: Cisco IOS XE Software for Cisco Catalyst 9200 Series Switches (affected versions not specified)

Description: A vulnerability in the Umbrella Connector component could allow an unauthenticated, remote attacker to trigger a reload, resulting in a denial of service condition on an affected device. The issue is due to insufficient error handling when parsing DNS requests. An attacker could exploit this by sending malicious DNS requests to an Umbrella Connector client interface, potentially causing a crash of the iosd process and triggering a reload of the device.

Recommendations: At the moment, there is no information about a newer version that contains a fix for this vulnerability.

DoS

Resource Exhaustion

Weakness Enumeration

CWE-388

CWE-400

Related Identifiers

BDU:2020-04599

CVE-2020-3510

Affected Products

Cisco Ios Xe

References · 6

• https://nvd.nist.gov/vuln/detail/CVE-2020-3510 · Security Note
• https://safe-surf.ru/specialists/bulletins-nkcki/657130 · Security Note
• https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-iosxe-umbrella-dos-t2QMUX37 · Vendor Advisory
• https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-iosxe-umbrella-dos-t2QMUX37 · Vendor Advisory
• https://bdu.fstec.ru/vul/2020-04599 · Security Note
• https://osv.dev/vulnerability/CVE-2020-3510 · Vendor Advisory