cisco-sa-20190515-sb300sms-dhcp: 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. There are no workarounds that address this vulnerability.
This advisory is available at the following link: https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190515-sb300sms-dhcp
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Affected Software
Event History
Frequently Asked Questions
What is the severity of cisco-sa-20190515-sb300sms-dhcp?
The severity of cisco-sa-20190515-sb300sms-dhcp is classified as high due to the potential for unauthenticated remote attacks.
How do I fix cisco-sa-20190515-sb300sms-dhcp?
To fix cisco-sa-20190515-sb300sms-dhcp, ensure that all Cisco Small Business 300 Series switches are updated to the latest firmware that addresses this vulnerability.
What devices are affected by cisco-sa-20190515-sb300sms-dhcp?
The devices affected by cisco-sa-20190515-sb300sms-dhcp are the Cisco Small Business 300 Series Managed Switches.
What impact does cisco-sa-20190515-sb300sms-dhcp have on network security?
cisco-sa-20190515-sb300sms-dhcp can lead to device instability and unexpected reloads, potentially disrupting network operations.
Can cisco-sa-20190515-sb300sms-dhcp be exploited without authentication?
Yes, cisco-sa-20190515-sb300sms-dhcp can be exploited by an unauthenticated remote attacker.