Critical severity · published Jul 16, 2020
CVE-2020-3357
Cisco RV340, RV340W, RV345, and RV345P Dual WAN Gigabit VPN Routers SSL Remote Code Execution and Denial of Service Vulnerability
9.8
CVSS
4.2%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)4.2% · higher than 91% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
CS
Cisco Small Business RV Series Router Firmware · Cisco
All versions, or not specified · source: vendor
RD
Rv340 Dual Wan Gigabit Vpn Router Firmware · Cisco
before 1.0.03.18 · source: NVD
RD
Rv340w Dual Wan Gigabit Wireless-ac Vpn Router Firmware · Cisco
before 1.0.03.18 · source: NVD
RD
Rv345 Dual Wan Gigabit Vpn Router Firmware · Cisco
before 1.0.03.18 · source: NVD
RD
Rv345p Dual Wan Gigabit Poe Vpn Router Firmware · Cisco
before 1.0.03.18 · source: NVD
Affected product
CS
Cisco Small Business RV Series Router Firmware
Cisco
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2020-3357
CVE.org
https://www.cve.org/CVERecord?id=CVE-2020-3357
Vendor Advisory
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-sb-rce-dos-9ZAjkx4
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