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CVE-2020-3357

CRITICALCVSS 9.8/10EPSS 4.24%

Last modified

CVE-2020-3357 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. A vulnerability in the Secure Sockets Layer (SSL) VPN feature of Cisco Small Business RV340, RV340W, RV345, and RV345P Dual WAN Gigabit VPN Routers could allow an unauthenticated, remote attacker to execute arbitrary code on an affected device or cause the device to reload, resulting in a denial of service (DoS) condition. The vulnerability exists because HTTP requests are not properly validated. EPSS estimates a 4.24% chance of exploitation in the next 30 days.

Description

A vulnerability in the Secure Sockets Layer (SSL) VPN feature of Cisco Small Business RV340, RV340W, RV345, and RV345P Dual WAN Gigabit VPN Routers could allow an unauthenticated, remote attacker to execute arbitrary code on an affected device or cause the device to reload, resulting in a denial of service (DoS) condition. The vulnerability exists because HTTP requests are not properly validated. An attacker could exploit this vulnerability by sending a crafted HTTP request over an SSL connection to an affected device. A successful exploit could allow the attacker to remotely execute arbitrary code on the device or cause the device to reload, resulting in a DoS condition.

Metrics

CVSS 3.1
9.8/10

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

EPSS Probability
4.24%

89.8th 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-2020-3357?
A vulnerability in the Secure Sockets Layer (SSL) VPN feature of Cisco Small Business RV340, RV340W, RV345, and RV345P Dual WAN Gigabit VPN Routers could allow an unauthenticated, remote attacker to execute arbitrary code on an affected device or cause the device to reload, resulting in a denial of service (DoS) condition. The vulnerability exists because HTTP requests are not properly validated. An attacker could exploit this vulnerability by sending a crafted HTTP request over an SSL connection to an affected device. A successful exploit could allow the attacker to remotely execute arbitrary code on the device or cause the device to reload, resulting in a DoS condition.
How severe is CVE-2020-3357?
CVE-2020-3357 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 4.24% probability of exploitation in the next 30 days.
How do I fix CVE-2020-3357?
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-2020-3357?

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

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Source: NVD / NIST