CVE-2019-1814: Cisco Small Business 300 Series Managed Switches DHCP Denial of Service Vulnerability
A vulnerability in the interactions between the DHCP and TFTP features for Cisco Small Business 300 Series (Sx300) Managed Switches could allow an unauthenticated, remote attacker to cause the device to become low on system memory, which in turn could lead to an unexpected reload of the device and result in a denial of service (DoS) condition on an affected device. The vulnerability is due to a failure to free system memory when an unexpected DHCP request is received. An attacker could exploit this vulnerability by sending a crafted DHCP packet to the targeted device. A successful exploit could allow the attacker to cause an unexpected reload of the device.
Affected Software
Event History
Frequently Asked Questions
What is CVE-2019-1814?
CVE-2019-1814 is a vulnerability in the interactions between the DHCP and TFTP features for Cisco Small Business 300 Series (Sx300) Managed Switches.
How does CVE-2019-1814 affect Cisco Small Business 300 Series Managed Switches?
CVE-2019-1814 could allow an unauthenticated, remote attacker to cause the device to become low on system memory, which could lead to an unexpected reload of the device.
What is the severity of CVE-2019-1814?
CVE-2019-1814 has a severity rating of 8.6 (high).
Is there a fix available for CVE-2019-1814?
Yes, Cisco has released a security advisory with mitigation recommendations for CVE-2019-1814.
Where can I find more information about CVE-2019-1814?
You can find more information about CVE-2019-1814 in the following references: [SecurityFocus](http://www.securityfocus.com/bid/108344), [Cisco Security Advisory](https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190515-sb300sms-dhcp).