CVE-2020-3358 Cisco RV340, RV340W, RV345, and RV345P Dual WAN Gigabit VPN Routers SSL Denial of Service Vulnerability

High 8.6 Published 16 Jul 2020 Updated 15 Nov 2024

Unauthenticated remote attackers can cause Cisco RV routers to restart via crafted SSL requests, resulting in denial of service.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Over the internet
Victim action needed: Not needed
Fix: None listed

What is CVE-2020-3358?

CVE-2020-3358 is a high-severity denial of service vulnerability in Cisco Small Business RV Series Router Firmware, published on 16 Jul 2020. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

A vulnerability in the Secure Sockets Layer (SSL) VPN feature for Cisco Small Business RV VPN Routers could allow an unauthenticated, remote attacker to cause the device to unexpectedly restart, causing a denial of service (DoS) condition. The vulnerability is due to a lack of proper input validation of HTTP requests. An attacker could exploit this vulnerability by sending a crafted HTTP request over an SSL connection to the targeted device. A successful exploit could allow the attacker to cause a reload, resulting in a DoS condition.

Weakness: CWE-20

Which versions are affected by CVE-2020-3358?

It affects 4 products.

Products include Cisco Rv340 Dual Wan Gigabit Vpn Router Firmware, Cisco Rv340w Dual Wan Gigabit Wireless-Ac Vpn Router Firmware, Cisco Rv345 Dual Wan Gigabit Vpn Router Firmware, Cisco Rv345p Dual Wan Gigabit Poe Vpn Router Firmware.

How do I fix CVE-2020-3358?

No fix has been published for CVE-2020-3358 yet. Limit exposure of the affected software until one is available.

Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.

Is CVE-2020-3358 being exploited?

There is no known exploitation of CVE-2020-3358 in the wild and no public exploit code.

Sources

Also known as GHSA-rjmm-h25r-cqxf.