Risk | High |
Patch available | YES |
Number of vulnerabilities | 1 |
CVE-ID | CVE-2021-34770 |
CWE-ID | CWE-122 |
Exploitation vector | Network |
Public exploit | N/A |
Vulnerable software Subscribe |
Cisco IOS XE Operating systems & Components / Operating system Catalyst 9800 Embedded Wireless Controller Hardware solutions / Routers & switches, VoIP, GSM, etc Cisco 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 |
Security Bulletin
This security bulletin contains one high risk vulnerability.
EUVDB-ID: #VU56857
Risk: High
CVSSv3.1: 8.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]
CVE-ID: CVE-2021-34770
CWE-ID:
CWE-122 - Heap-based Buffer Overflow
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to execute arbitrary code on the target system.
The vulnerability exists due to a boundary error in the Control and Provisioning of Wireless Access Points (CAPWAP) protocol. A remote attacker can pass specially crafted data to the application, trigger heap-based buffer overflow and execute arbitrary code on the target system.
Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.
MitigationInstall updates from vendor's website.
Vulnerable software versionsCisco IOS XE: 16.12.4a - 17.3.1
Catalyst 9800 Embedded Wireless Controller: All versions
Cisco 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 linksQ & A
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.