CVE intelligence and bounded remediation

CVE-2019-1814 — Cisco Sf302-08Pp Firmware security vulnerability

High CVSS 8.6

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.

Severity
High
CVSS
8.6 (3.1)
Published
2019-05-16
CISA KEV
Not currently listed
Ecosystem
operating-system
Weaknesses
CWE-400, CWE-770

Affected products

  • cisco / sf302-08pp_firmware
  • cisco / sf302-08mpp_firmware
  • cisco / sg300-10pp_firmware
  • cisco / sg300-10mpp_firmware
  • cisco / sf300-24pp_firmware
  • cisco / sf300-48pp_firmware

Showing 6 representative product identities from 27 source matches. Confirm exact affected versions with the linked vendor and NVD evidence.

Matched remediation archetype

Resource exhaustion and denial of service

This catalog composition supplies bounded fallback guidance. Explicitly reviewed curated workflows load with the complete record below.

Check exposure

  • Identify attacker-influenced work factors including input size, nesting, compression, fan-out, regex cost, allocation, recursion, retries, and connection lifetime.
  • Map per-request and shared CPU, memory, disk, descriptor, thread, queue, and downstream-service limits.
  • Determine whether authentication, tenancy, quotas, and rate controls apply before expensive processing begins.

Remediate safely

  • Bound input size, nesting, expansion, work, concurrency, queue depth, retries, and execution time before resource-intensive processing.
  • Release resources on every success, error, cancellation, and timeout path and use backpressure instead of unbounded buffering.
  • Update affected components and add small deterministic tests that assert resource ceilings rather than exhausting a host.

Authoritative sources

Complete CVE record and remediation plan

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