Vulnerability identifier: #VU62321
Vulnerability risk: High
CVSSv3.1: 7.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H/E:U/RL:O/RC:C]
CVE-ID:
CWE-ID:
CWE-252
Exploitation vector: Network
Exploit availability: No
Vulnerable software:
Cisco IOS XE
Operating systems & Components /
Operating system
Catalyst 9300 Series Switches
Hardware solutions /
Routers & switches, VoIP, GSM, etc
Catalyst 9400 Series Switches
Hardware solutions /
Routers & switches, VoIP, GSM, etc
Catalyst 9500 Series Switches
Hardware solutions /
Routers & switches, VoIP, GSM, etc
Catalyst 9800 Embedded Wireless Controller
Hardware solutions /
Routers & switches, VoIP, GSM, etc
Catalyst 9800 Series Wireless Controllers
Hardware solutions /
Routers & switches, VoIP, GSM, etc
Catalyst 9800-CL Wireless Controllers for Cloud
Hardware solutions /
Routers & switches, VoIP, GSM, etc
Embedded Wireless Controller on Catalyst Access Points
Hardware solutions /
Routers & switches, VoIP, GSM, etc
Vendor: Cisco Systems, Inc
Description
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to inadequate input validation in the Control and Provisioning of Wireless Access Points (CAPWAP) protocol. A remote attacker can send a specially crafted mDNS query and perform a denial of service (DoS) attack.
Mitigation
Install updates from vendor's website.
Vulnerable software versions
Cisco IOS XE: 17.3.2 - 17.3.2.1
Catalyst 9300 Series Switches: All versions
Catalyst 9400 Series Switches: All versions
Catalyst 9500 Series Switches: All versions
Catalyst 9800 Embedded Wireless Controller: All versions
Catalyst 9800 Series Wireless Controllers: All versions
Catalyst 9800-CL Wireless Controllers for Cloud: All versions
Embedded Wireless Controller on Catalyst Access Points: All versions
External links
http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-c9800-capwap-mdns-6PSn7gKU
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.