#VU30440 Link following in Cisco SD-WAN - CVE-2020-3437

Vulnerability identifier: #VU30440

Vulnerability risk: Medium

CVSSv4.0: 4.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2020-3437

CWE-ID: CWE-59

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Cisco SD-WAN
Client/Desktop applications / Virtualization software

Vendor: Cisco Systems, Inc

Description

The vulnerability allows a remote attacker to access sensitive information on the target system.

The vulnerability exists due to insufficient file scope limiting in the web-based management interface. A remote authenticated attacker can create a specific file reference on the filesystem and read arbitrary files from the filesystem of the underlying operating system.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Cisco SD-WAN: 19.2.2

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External links
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-vmanwebid-5QWMcCvt

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.

Is there known malware, which exploits this vulnerability?

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