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CVE-2020-3358

HIGHCVSS 8.6/10EPSS 1.35%

Last modified

CVE-2020-3358 is a high-severity vulnerability rated 8.6/10 on the CVSS scale. 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. EPSS estimates a 1.35% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1
8.6/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H

EPSS Probability
1.35%

68.0th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

VendorProductVersions
CiscoRv340 Dual Wan Gigabit Vpn Router Firmware< 1.0.03.18
CiscoRv340w Dual Wan Gigabit Wireless-Ac Vpn Router Firmware< 1.0.03.18
CiscoRv345 Dual Wan Gigabit Vpn Router Firmware< 1.0.03.18
CiscoRv345p Dual Wan Gigabit Poe Vpn Router Firmware< 1.0.03.18

References

Timeline

Published
Last Modified
Status
Modified

Frequently Asked Questions

What is CVE-2020-3358?
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.
How severe is CVE-2020-3358?
CVE-2020-3358 has a CVSS score of 8.6/10 (HIGH severity). The EPSS model estimates a 1.35% probability of exploitation in the next 30 days.
How do I fix CVE-2020-3358?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2020-3358?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST