PT-2020-4181 · Cisco · Cisco Ios Xe

Published 2020-09-24 · Updated 2024-12-19 · CVE-2020-3359

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 9800 Series Wireless Controllers (affected versions not specified) Cisco IOS XE Software for Cisco Catalyst 9000 Series (affected versions not specified)

Description: The issue is related to insufficient validation of input data in the multicast DNS (mDNS) feature, which could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition by sending a crafted mDNS packet to an affected device. A successful exploit could cause a device to reload, resulting in a DoS condition.

Recommendations: For Cisco IOS XE Software for Cisco Catalyst 9800 Series Wireless Controllers, update to a version that includes the fix for this issue. For Cisco IOS XE Software for Cisco Catalyst 9000 Series, update to a version that includes the fix for this issue. As a temporary workaround, consider restricting access to the mDNS feature until a patch is available. Note: Cisco has released software updates that address this vulnerability, and there are no workarounds that address this vulnerability.

Fix

DoS

RCE

Weakness Enumeration

CWE-20

Related Identifiers

BDU:2020-04603

CVE-2020-3359

Affected Products

Cisco Ios Xe

References · 7

• https://bdu.fstec.ru/vul/2020-04603 · Security Note
• https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-mdns-dos-3tH6cA9J · Vendor Advisory
• https://safe-surf.ru/specialists/bulletins-nkcki/657130 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2020-3359 · Security Note
• https://osv.dev/vulnerability/CVE-2020-3359 · Vendor Advisory
• https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-mdns-dos-3tH6cA9J · Vendor Advisory
• https://t.me/cvenotify/104873 · Telegram Post