Denial of service in Cisco SD-WAN Software vDaemon

1) Input validation error

EUVDB-ID: #VU52932

Risk: Medium

CVSSv4.0: 6.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2021-1513

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

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

The vulnerability exists due to insufficient validation of user-supplied input in the vDaemon process. A remote attacker can send specially crafted packets to the system and perform a denial of service (DoS) attack.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Cisco SD-WAN vBond Orchestrator: before 20.4.1

Cisco SD-WAN vEdge Routers: before 20.4.1

Cisco SD-WAN vEdge Cloud Router: before 20.4.1

Cisco SD-WAN vManage: before 20.4.1

Cisco SD-WAN vSmart Controller: before 20.4.1

CPE2.3

• cpe:2.3:a:cisco_systems:cisco_sd-wan_vbond_orchestrator:*:*:*:*:*:*:*:*
• cpe:2.3:h:cisco_systems:cisco_sd-wan_vedge_routers:*:*:*:*:*:*:*:*
• cpe:2.3:h:cisco_systems:cisco_sd-wan_vedge_cloud_router:*:*:*:*:*:*:*:*
• cpe:2.3:a:cisco_systems:cisco_sd-wan_vmanage:*:*:*:*:*:*:*:*
• cpe:2.3:h:cisco_systems:cisco_sd-wan_vsmart_controller:*:*:*:*:*:*:*:*

External links

https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-sdwan-dos-Ckn5cVqW
https://bst.cloudapps.cisco.com/bugsearch/bug/CSCvu28378

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

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