PT-2021-17045 · Synology · Synology Diskstation Manager

Published 2021-02-26 · Updated 2025-01-14 · CVE-2021-26567

Positive Technologies (AI Summary)

CVSS v3.1

7.8

High

Base vector

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

Name of the Vulnerable Software and Affected Versions faad2 versions prior to 2.2.7.1 faad in Synology DiskStation Manager (DSM) versions prior to 6.2.3-25426-3

Description The issue is related to a stack-based buffer overflow vulnerability and the use of unmaintained third-party components. This allows attackers to execute arbitrary code. The vulnerability can be exploited via filename and pathname options, as well as through a crafted file path.

Recommendations For faad2 versions prior to 2.2.7.1, update to version 2.2.7.1 or later. For faad in Synology DiskStation Manager (DSM) versions prior to 6.2.3-25426-3, update to version 6.2.3-25426-3 or later.

Fix

Memory Corruption

Stack Overflow

Weakness Enumeration

CWE-787

CWE-121

Related Identifiers

CVE-2021-26567

Affected Products

Synology Diskstation Manager

References · 5

• https://github.com/knik0/faad2/commit/720f7004d6c4aabee19aad16e7c456ed76a3ebfa · Patch
• https://nvd.nist.gov/vuln/detail/CVE-2021-26567 · Security Note
• https://osv.dev/vulnerability/CVE-2021-26567 · Vendor Advisory
• https://synology.com/security/advisory/Synology_SA_20_26 · Vendor Advisory
• https://t.me/cibsecurity/24262 · Telegram Post