Cisco · Cisco Small Business Rv Vpn Routers · CVE-2020-3358
**Name of the Vulnerable Software and Affected Versions**
Cisco Small Business RV VPN Routers (affected versions not specified)
Cisco Small Business RV340
Cisco Small Business RV340W
Cisco Small Business RV345
Cisco Small Business RV345P
**Description**
A vulnerability in the Secure Sockets Layer (SSL) VPN feature could allow an unauthenticated, remote attacker to cause the device to unexpectedly restart, resulting in a denial of service (DoS) condition. This issue is due to a lack of proper input validation of HTTP requests. An attacker could exploit this by sending a crafted HTTP request over an SSL connection to the targeted device, causing a reload and resulting in a DoS condition.
**Recommendations**
For Cisco Small Business RV VPN Routers, consider temporarily disabling the SSL VPN feature until a patch is available.
For Cisco Small Business RV340, RV340W, RV345, and RV345P, restrict access to the VPN functionality to minimize the risk of exploitation.
As a temporary workaround, consider implementing additional input validation for HTTP requests to prevent crafted requests from causing a device restart.
At the moment, there is no information about a newer version that contains a fix for this vulnerability.