Denial of service in Multiple Cisco Products

1) Allocation of Resources Without Limits or Throttling

EUVDB-ID: #VU51250

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 - Allocation of Resources Without Limits or Throttling

Exploit availability: No

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

Snort: before 2.9.17

External links

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

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.