Denial of service in Cisco SD-WAN vEdge Routers

1) Uncontrolled Memory Allocation

EUVDB-ID: #VU62347

Risk: Low

CVSSv3.1: 4.8 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2022-20717

CWE-ID: CWE-789 - Uncontrolled Memory Allocation

Exploit availability: No

Description

The vulnerability allows a local user to perform a denial of service (DoS) attack.

The vulnerability exists due to insufficient memory management when an affected device receives large amounts of traffic. A local user can pass specially crafted input to the application and perform a denial of service (DoS) attack.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

1100 Series Integrated Services Routers: 20.6 - 20.7

Cisco SD-WAN vEdge 100 Series Routers: 20.6 - 20.7

Cisco SD-WAN vEdge 1000 Series Routers: 20.6 - 20.7

Cisco SD-WAN vEdge 2000 Series Routers: 20.6 - 20.7

Cisco SD-WAN vEdge 5000 Series Routers: 20.6 - 20.7

External links

http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-sdwan-vedge-dos-jerVm4bB

Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

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.

The attacker would have to login to the system and perform certain actions in order to exploit this vulnerability.

Is there known malware, which exploits this vulnerability?

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