Denial of service in Cisco IOS XE Software for Catalyst 9200 Series Switches
| Risk | Medium |
| Patch available | YES |
| Number of vulnerabilities | 1 |
| CVE-ID | CVE-2020-3510 |
| CWE-ID | CWE-388 |
| Exploitation vector | Network |
| Public exploit | N/A |
| Vulnerable software Subscribe |
Cisco Catalyst 9200 Series Switches Hardware solutions / Routers & switches, VoIP, GSM, etc Cisco IOS XE Operating systems & Components / Operating system |
| Vendor | Cisco Systems, Inc |
Security Bulletin
This security bulletin contains one medium risk vulnerability.
1) Error Handling
EUVDB-ID: #VU47234
Risk: Medium
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: CVE-2020-3510
CWE-ID:
CWE-388 - Error Handling
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to insufficient error handling when parsing DNS requests in the Umbrella Connector component. A remote attacker can send a series of malicious DNS requests to an Umbrella Connector client interface and cause a denial of service condition.
MitigationInstall updates from vendor's website.
Vulnerable software versionsCisco Catalyst 9200 Series Switches: All versions
Cisco IOS XE: 16.12.1 - 16.12.2
External linksQ & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.
How the attacker can exploit this vulnerability?
The attacker would have to send a specially crafted request to the affected device in order to exploit this vulnerability.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
