Command Injection in Cisco SD-WAN Software

1) Command Injection

EUVDB-ID: #VU56871

Risk: Low

CVSSv3.1: 5.8 [CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-34726

CWE-ID: CWE-77 - Command injection

Exploit availability: No

Description

The vulnerability allows a local user to execute arbitrary commands on the target system.

The vulnerability exists due to improper input validation in the CLI. A local administrator can pass specially crafted data to the application and execute arbitrary commands on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Cisco SD-WAN: 18.4.0 - 20.5

Cisco SD-WAN vBond Orchestrator: All versions

Cisco SD-WAN vEdge Cloud Router: All versions

Cisco SD-WAN vEdge Routers: All versions

Cisco SD-WAN vManage: All versions

Cisco SD-WAN vSmart Controller: All versions

CPE2.3

• cpe:2.3:a:cisco_systems:cisco_sd-wan:18.4.0:*:*:*:*:*:*:
• cpe:2.3:a:cisco_systems:cisco_sd-wan:19.2.0:*:*:*:*:*:*:
• cpe:2.3:a:cisco_systems:cisco_sd-wan:20.1.0:*:*:*:*:*:*:
• cpe:2.3:a:cisco_systems:cisco_sd-wan_vbond_orchestrator:*:*:*:*:*:*:*:
• cpe:2.3:h:cisco_systems:cisco_sd-wan_vedge_cloud_router:*:*:*:*:*:*:*:
• cpe:2.3:h:cisco_systems:cisco_sd-wan_vedge_routers:*:*:*:*:*:*:*:
• cpe:2.3:a:cisco_systems:Catalyst SD-WAN Manager:*:*:*:*:*:*:*:
• cpe:2.3:h:cisco_systems:cisco_sd-wan_vsmart_controller:*:*:*:*:*:*:*:

External links

http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-sdwan-maapi-cmdinjec-znUYTuC

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 trick the victim to open a a specially crafted file.

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.