#VU31723 Input validation error in Cisco Systems, Inc products - CVE-2020-3357

Vulnerability identifier: #VU31723

Vulnerability risk: High

CVSSv4.0: 8.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber]

CVE-ID: CVE-2020-3357

CWE-ID: CWE-20

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Cisco RV340 Dual WAN Gigabit VPN Router
Hardware solutions / Routers & switches, VoIP, GSM, etc
Cisco RV340W Dual WAN Gigabit Wireless-AC VPN Router
Hardware solutions / Routers & switches, VoIP, GSM, etc
Cisco RV345 Dual WAN Gigabit VPN Router
Hardware solutions / Routers & switches, VoIP, GSM, etc
Cisco RV345P Dual WAN Gigabit VPN Router
Hardware solutions / Routers & switches, VoIP, GSM, etc

Vendor: Cisco Systems, Inc

Description

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to insufficient validation of user-supplied input in the Secure Sockets Layer (SSL) VPN feature. A remote attacker can send a specially crafted HTTP request and execute arbitrary code on the target device or cause the device to reload, resulting in a denial of service (DoS) condition.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Cisco RV340 Dual WAN Gigabit VPN Router: 1.0.3.17

Cisco RV340W Dual WAN Gigabit Wireless-AC VPN Router: 1.0.01.16 - 1.0.03.17

Cisco RV345 Dual WAN Gigabit VPN Router: 1.0.3.17

Cisco RV345P Dual WAN Gigabit VPN Router: 1.0.3.17

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External links
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-sb-rce-dos-9ZAjkx4

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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.