PT-2019-2209 · Cisco · Cisco Small Business 300 Series Managed Switches

Published 2019-05-15 · Updated 2020-10-16 · CVE-2019-1814

Positive Technologies (AI Summary)

CVSS v3.1

8.6

High

Base vector

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

Name of the Vulnerable Software and Affected Versions Cisco Small Business 300 Series (Sx300) Managed Switches (affected versions not specified)

Description A vulnerability in the interactions between the DHCP and TFTP features could allow an unauthenticated, remote attacker to cause the device to become low on system memory, leading to an unexpected reload of the device and resulting in a denial of service (DoS) condition. The issue is due to a failure to free system memory when an unexpected DHCP request is received. An attacker could exploit this by sending a crafted DHCP packet to the targeted device, potentially causing an unexpected reload.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Allocation of Resources Without Limits

Resource Exhaustion

Weakness Enumeration

CWE-770

CWE-400

Related Identifiers

BDU:2019-01980

CVE-2019-1814

Affected Products

Cisco Small Business 300 Series Managed Switches

References · 5

• https://nvd.nist.gov/vuln/detail/CVE-2019-1814 · Security Note
• https://osv.dev/vulnerability/CVE-2019-1814 · Vendor Advisory
• https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190515-sb300sms-dhcp · Vendor Advisory
• https://bdu.fstec.ru/vul/2019-01980 · Security Note
• http://securityfocus.com/bid/108344 · Note