CVE-2021-26561: Buffer Overflow
First published: Fri Feb 26 2021(Updated: )
Stack-based buffer overflow vulnerability in synoagentregisterd in Synology DiskStation Manager (DSM) before 6.2.3-25426-3 allows man-in-the-middle attackers to execute arbitrary code via syno_finder_site HTTP header.
Credit: security@synology.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Synology DiskStation Manager | <6.2.3-25426-3 | |
| Synology Vs960hd Firmware | ||
| Synology Vs960hd | ||
| Synology Skynas Firmware | ||
| Synology Skynas | ||
| Synology Diskstation Manager Unified Controller | =3.0 | |
| Synology Uc3200 |
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Reference Links
Frequently Asked Questions
What is the severity of CVE-2021-26561?
The severity of CVE-2021-26561 is critical with a CVSS score of 8.1.
How does CVE-2021-26561 affect Synology DiskStation Manager (DSM)?
CVE-2021-26561 affects Synology DiskStation Manager (DSM) versions up to and including 6.2.3-25426-3.
How can man-in-the-middle attackers exploit CVE-2021-26561?
Man-in-the-middle attackers can exploit CVE-2021-26561 by sending a specially crafted syno_finder_site HTTP header.
Are Synology Vs960hd and Synology Skynas affected by CVE-2021-26561?
No, Synology Vs960hd and Synology Skynas are not affected by CVE-2021-26561.
Is there a fix for CVE-2021-26561?
Yes, Synology has released a patch for CVE-2021-26561. Please refer to the official advisory for more details.
- agent/references
- agent/type
- agent/last-modified-date
- agent/first-publish-date
- collector/nvd-index
- agent/software-canonical-lookup-request
- agent/weakness
- agent/severity
- agent/author
- agent/softwarecombine
- agent/tags
- agent/description
- agent/event
- collector/mitre-cve
- source/MITRE
- vendor/synology
- canonical/synology diskstation manager
- canonical/synology vs960hd firmware
- canonical/synology vs960hd
- canonical/synology skynas firmware
- canonical/synology skynas
- canonical/synology diskstation manager unified controller
- version/synology diskstation manager unified controller/3.0
- canonical/synology uc3200