Vulnerability identifier: #VU14664

Vulnerability risk: High

CVSSv3.1: 8.7 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2018-0423

CWE-ID: CWE-120

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
RV215W Wireless-N VPN Router
Hardware solutions / Routers for home users
RV110W Wireless-N VPN Firewall
Hardware solutions / Routers for home users
RV130W Wireless-N Multifunction VPN Router
Hardware solutions / Routers for home users

Vendor: Cisco Systems, Inc

Description

The vulnerability allows a remote attacker to cause DoS condition or execute arbitrary code.

The vulnerability exists in the web-based management interface of the Cisco RV110W Wireless-N VPN Firewall, Cisco RV130W Wireless-N Multifunction VPN Router, and Cisco RV215W Wireless-N VPN Router due to boundary error when handling user-supplied input in the Guest user feature. A remote attacker can send malicious requests to a targeted device, trigger a buffer overflow condition and cause the device to stop responding or execute arbitrary code with elevated privileges.

Mitigation

Update Cisco RV130W Wireless-N Multifunction VPN Router to version 1.3.0.44.

For the Cisco RV110W Wireless-N VPN Firewall and the Cisco RV215W Wireless-N VPN Router, Cisco has not released and will not release firmware updates.

Vulnerable software versions

RV215W Wireless-N VPN Router: 1.3.0.8

RV110W Wireless-N VPN Firewall: 1.2.1.7

RV130W Wireless-N Multifunction VPN Router: 1.0.3.8

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External links
http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180905-rv-routers-overflow

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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.