PT-2021-17578 · Synology · Synology Diskstation Manager

Published 2021-03-12 · Updated 2025-01-14 · CVE-2021-27646

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 Synology DiskStation Manager versions prior to 6.2.3-25426-3

Description The issue is related to a Use After Free vulnerability in the iscsi snapshot comm core component of Synology DiskStation Manager. This vulnerability allows remote attackers to execute arbitrary code via crafted web requests.

Recommendations For versions prior to 6.2.3-25426-3, update to version 6.2.3-25426-3 or later to resolve the issue. As a temporary workaround, consider restricting access to the iscsi snapshot comm core component until a patch is applied.

Fix

RCE

Use After Free

Weakness Enumeration

CWE-416

Related Identifiers

CVE-2021-27646

ZDI-21-340

Affected Products

Synology Diskstation Manager

References · 8

• https://nvd.nist.gov/vuln/detail/CVE-2021-27646 · Security Note
• https://osv.dev/vulnerability/CVE-2021-27646 · Vendor Advisory
• https://zerodayinitiative.com/advisories/ZDI-21-340 · Security Note
• https://synology.com/security/advisory/Synology_SA_20_26 · Vendor Advisory
• https://t.me/cibsecurity/24834 · Telegram Post
• https://t.me/cvenotify/11713 · Telegram Post
• https://t.me/cvenotify/11236 · Telegram Post
• https://zerodayinitiative.com/advisories/ZDI-21-339 · Note