CVE intelligence and bounded remediation

CVE-2023-22817 — Westerndigital My Cloud Pr2100 Firmware security vulnerability

Medium CVSS 5.5

Server-side request forgery (SSRF) vulnerability that could allow a rogue server on the local network to modify its URL using another DNS address to point back to the loopback adapter. This could then allow the URL to exploit other vulnerabilities on the local server. This was addressed by fixing DNS addresses that refer to loopback. This issue affects My Cloud OS 5 devices before 5.27.161, My Cloud Home, My Cloud Home Duo and SanDisk ibi devices before 9.5.1-104.

Severity
Medium
CVSS
5.5 (3.1)
Published
2024-02-05
CISA KEV
Not currently listed
Ecosystem
operating-system
Weaknesses
CWE-918

Affected products

  • westerndigital / my_cloud_pr2100_firmware
  • westerndigital / my_cloud_pr4100_firmware
  • westerndigital / my_cloud_ex4100_firmware
  • westerndigital / my_cloud_ex2_ultra_firmware
  • westerndigital / my_cloud_mirror_g2_firmware
  • westerndigital / my_cloud_dl2100_firmware

Showing 6 representative product identities from 13 source matches. Confirm exact affected versions with the linked vendor and NVD evidence.

Matched remediation archetype

Server-side request forgery and unintended proxying

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

Check exposure

  • Inventory server-side URL fetchers, webhooks, importers, previews, redirects, proxies, and protocol handlers reachable from untrusted input.
  • Map egress paths to internal services, metadata endpoints, loopback, private address space, and privileged control planes.
  • Review DNS resolution, redirect, proxy, credential-forwarding, and URL parsing behavior without requesting sensitive targets.

Remediate safely

  • Replace arbitrary destinations with named integrations or a strict allowlist of schemes, hosts, ports, and paths.
  • Resolve and validate every destination and redirect hop, then enforce egress policy independently of application checks.
  • Remove ambient credentials and sensitive headers from fetchers; apply response size, time, and content limits.

Authoritative sources

Complete CVE record and remediation plan

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