Vulnerability identifier: #VU47235

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-2020-3508

CWE-ID: CWE-400

Exploitation vector: Local network

Exploit availability: No

Vulnerable software:
Cisco ASR 1000 Series Aggregation Services Routers
Hardware solutions / Routers & switches, VoIP, GSM, etc
Cisco IOS XE
Operating systems & Components / Operating system

Vendor: Cisco Systems, Inc

Description

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

The vulnerability exists due to application does not properly control consumption of internal resources in the IP Address Resolution Protocol (ARP) feature. A remote attacker on the local network can send a malicious series of IP ARP messages, trigger resource exhaustion and perform a denial of service (DoS) attack.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Cisco ASR 1000 Series Aggregation Services Routers: All versions

Cisco IOS XE: 16.6.5 - Denali 16.3.1

---

External links
http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-esp20-arp-dos-GvHVggqJ

---

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.