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High severity · published Jul 16, 2020
CVE-2020-3351
A vulnerability in Cisco SD-WAN Solution Software could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition
8.6
CVSS
1.4%
EPSS
No
On KEV
Description
A vulnerability in Cisco SD-WAN Solution Software could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition. The vulnerability is due to improper validation of fields in Cisco SD-WAN peering messages that are encapsulated in UDP packets. An attacker could exploit this vulnerability by sending crafted UDP messages to the targeted system. A successful exploit could allow the attacker to cause services on the device to fail, resulting in a DoS condition that could impact the targeted device and other devices that depend on it.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)1.4% · higher than 72% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
SF
Sd-wan Firmware · Cisco
before 17.2.7; 17.2.8 before 18.3.0 · source: NVD
VC
Vedge Cloud Router · Cisco
All versions, or not specified · source: NVD
VC
Vsmart Controller · Cisco
All versions, or not specified · source: NVD
Affected product
SF
Sd-wan Firmware
Cisco
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2020-3351
CVE.org
https://www.cve.org/CVERecord?id=CVE-2020-3351
Vendor Advisory
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-sdw-dos-KWOdyHnB
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