#VU22601 Input validation error in Cisco Systems, Inc products - CVE-2019-15957

Vulnerability identifier: #VU22601

Vulnerability risk: Medium

CVSSv4.0: 6.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2019-15957

CWE-ID: CWE-20

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Cisco RV016 Multi-WAN VPN Router
Hardware solutions / Routers & switches, VoIP, GSM, etc
Cisco RV042 Dual WAN VPN Router
Hardware solutions / Routers & switches, VoIP, GSM, etc
Cisco RV042G Dual Gigabit WAN VPN Router
Hardware solutions / Routers & switches, VoIP, GSM, etc
Cisco RV082 Dual WAN VPN Router
Hardware solutions / Routers & switches, VoIP, GSM, etc
Small Business RV320 Dual Gigabit WAN VPN Router
Hardware solutions / Routers & switches, VoIP, GSM, etc
Small Business RV325 Dual Gigabit WAN VPN Router
Hardware solutions / Routers & switches, VoIP, GSM, etc

Vendor: Cisco Systems, Inc

Description

The vulnerability allows a remote attacker to inject arbitrary commands on the target system.

The vulnerability exists due to insufficient validation of user-supplied input in the web-based management interface. A remote authenticated administrator can provide malicious input to a specific field in the web-based management interface of an affected device and execute arbitrary commands on the underlying Linux operating system.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Cisco RV016 Multi-WAN VPN Router: 3.0.0.1 tm - 4.2.3.09

Cisco RV042 Dual WAN VPN Router: 4.1.0.02 tm - 4.2.3.09

Cisco RV042G Dual Gigabit WAN VPN Router: 4.2.1.02 - 4.2.8.08

Cisco RV082 Dual WAN VPN Router: 1.3.9.8 tm - 4.2.3.09

Small Business RV320 Dual Gigabit WAN VPN Router: 1.4.2.22

Small Business RV325 Dual Gigabit WAN VPN Router: 1.3.1.12 - 1.4.2.22

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External links
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20191106-sbr-cominj

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Q & A

Can this vulnerability be exploited remotely?

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

Is there known malware, which exploits this vulnerability?

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