Resource management error in Cisco Systems, Inc products - CVE-2021-1611
Published: September 24, 2021
Vulnerability identifier: #VU56858
CSH Severity: Medium
CVSS v4.0: 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
CVE-ID: CVE-2021-1611
CWE-ID: CWE-399
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: Cisco Systems, Inc
Affected software:
Cisco IOS XE
Catalyst 9800 Embedded Wireless Controller
Cisco Catalyst 9800 Series Wireless Controllers
Embedded Wireless Controller on Catalyst Access Points
Catalyst 9800 Wireless Controllers for Cloud
Cisco IOS XE
Catalyst 9800 Embedded Wireless Controller
Cisco Catalyst 9800 Series Wireless Controllers
Embedded Wireless Controller on Catalyst Access Points
Catalyst 9800 Wireless Controllers for Cloud
Detailed vulnerability description
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to improper management of internal resources within the application in Ethernet over GRE (EoGRE) packet processing. A remote attacker can pass specially crafted data to the application and perform a denial of service (DoS) attack.
How to mitigate CVE-2021-1611
Install updates from vendor's website.