Vulnerability identifier: #VU51250

Vulnerability risk: Low

CVSSv3.1: 6.4 [CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-1285

CWE-ID: CWE-770

Exploitation vector: Local network

Exploit availability: No

Vulnerable software:
Cisco UTD Snort IPS Engine Software for IOS XE
Other software / Other software solutions
Cisco UTD Engine for IOS XE SD-WAN
Other software / Other software solutions
Cisco 1000 Series Integrated Services Routers
Hardware solutions / Routers & switches, VoIP, GSM, etc
4000 Series Integrated Services Routers
Hardware solutions / Routers & switches, VoIP, GSM, etc
Catalyst 8000V Edge Software
Hardware solutions / Routers & switches, VoIP, GSM, etc
Catalyst 8200 Series Edge Platforms
Hardware solutions / Routers & switches, VoIP, GSM, etc
Catalyst 8300 Series Edge Platforms
Hardware solutions / Routers & switches, VoIP, GSM, etc
Cloud Services Router 1000V Series
Hardware solutions / Routers & switches, VoIP, GSM, etc
Integrated Services Virtual Routers
Hardware solutions / Routers & switches, VoIP, GSM, etc
Snort
Server applications / IDS/IPS systems, Firewalls and proxy servers

Vendor: Cisco Systems, Inc

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to improper handling of error conditions when processing Ethernet frames. A remote attacker on the local network can send malicious Ethernet frames and cause a denial of service condition on the target system.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Cisco UTD Snort IPS Engine Software for IOS XE: 16.12 - 17.4

Cisco UTD Engine for IOS XE SD-WAN: 16.12 - 17.4

Cisco 1000 Series Integrated Services Routers: All versions

4000 Series Integrated Services Routers: All versions

Catalyst 8000V Edge Software: All versions

Catalyst 8200 Series Edge Platforms: All versions

Catalyst 8300 Series Edge Platforms: All versions

Cloud Services Router 1000V Series: All versions

Integrated Services Virtual Routers: All versions

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External links
http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-snort-ethernet-dos-HGXgJH8n

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the local network (LAN).

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.