PT-2020-17072 · Western Digital · Western Digital My Cloud Os 5

S_N_T + 1 · Published 2020-12-01 · Updated 2022-04-26 · CVE-2020-28970

Positive Technologies (AI Summary)

CVSS v3.1

9.8

Critical

Base vector

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

Name of the Vulnerable Software and Affected Versions Western Digital My Cloud OS 5 versions prior to 5.06.115

Description An issue was discovered that could allow an unauthenticated user to execute privileged commands on the device via a cookie, effectively bypassing NAS Admin authentication. This could be further exploited by an authenticated administrator using an upload endpoint to upload executable PHP scripts.

Recommendations For Western Digital My Cloud OS 5 versions prior to 5.06.115, update to version 5.06.115 or later to resolve the issue. As a temporary workaround, consider restricting access to the upload endpoint and limiting the execution of privileged commands until a patch is applied.

Fix

Improper Authentication

Weakness Enumeration

CWE-287

Related Identifiers

CVE-2020-28970

ZDI-20-1448

Affected Products

Western Digital My Cloud Os 5

References · 7

• https://nvd.nist.gov/vuln/detail/CVE-2020-28970 · Security Note
• https://osv.dev/vulnerability/CVE-2020-28970 · Vendor Advisory
• https://zerodayinitiative.com/advisories/ZDI-20-1448 · Security Note
• https://support.wdc.com/downloads.aspx?g=907&lang=en#downloads · Vendor Advisory
• https://westerndigital.com/support/productsecurity/wdc-20009-os5-firmware-5-06-115 · Vendor Advisory
• https://t.me/cibsecurity/16984 · Telegram Post
• https://t.me/cvenotify/6401 · Telegram Post