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CVE-2019-1814

HIGHCVSS 8.6/10EPSS 2.13%

Last modified

CVE-2019-1814 is a high-severity vulnerability rated 8.6/10 on the CVSS scale. 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. EPSS estimates a 2.13% chance of exploitation in the next 30 days.

Description

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.

Metrics

CVSS 3.1
8.6/10

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

EPSS Probability
2.13%

79.6th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

VendorProductVersions
CiscoSf302-08pp Firmware< 1.4.10.6
CiscoSf302-08mpp Firmware< 1.4.10.6
CiscoSg300-10pp Firmware< 1.4.10.6
CiscoSg300-10mpp Firmware< 1.4.10.6
CiscoSf300-24pp Firmware< 1.4.10.6
CiscoSf300-48pp Firmware< 1.4.10.6
CiscoSg300-28pp Firmware< 1.4.10.6
CiscoSf300-08 Firmware< 1.4.10.6
CiscoSf300-48p Firmware< 1.4.10.6
CiscoSg300-10mp Firmware< 1.4.10.6
CiscoSg300-10p Firmware< 1.4.10.6
CiscoSg300-10 Firmware< 1.4.10.6
CiscoSg300-28p Firmware< 1.4.10.6
CiscoSf300-24p Firmware< 1.4.10.6
CiscoSf302-08mp Firmware< 1.4.10.6
CiscoSg300-28 Firmware< 1.4.10.6
CiscoSf300-48 Firmware< 1.4.10.6
CiscoSg300-20 Firmware< 1.4.10.6
CiscoSf302-08p Firmware< 1.4.10.6
CiscoSg300-52 Firmware< 1.4.10.6
CiscoSf300-24 Firmware< 1.4.10.6
CiscoSf302-08 Firmware< 1.4.10.6
CiscoSf300-24mp Firmware< 1.4.10.6
CiscoSg300-10sfp Firmware< 1.4.10.6
CiscoSg300-28mp Firmware< 1.4.10.6
CiscoSg300-52p Firmware< 1.4.10.6
CiscoSg300-52mp Firmware< 1.4.10.6

References

Timeline

Published
Last Modified
Status
Modified

Frequently Asked Questions

What is CVE-2019-1814?
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.
How severe is CVE-2019-1814?
CVE-2019-1814 has a CVSS score of 8.6/10 (HIGH severity). The EPSS model estimates a 2.13% probability of exploitation in the next 30 days.
How do I fix CVE-2019-1814?
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-2019-1814?

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

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Source: NVD / NIST