Command execution via downgraded QuickConnect traffic
Published Feb 26, 2021 · Updated Sep 17, 2024
CWE-201 in synorelayd in Synology DiskStation Manager before 6.2.3-25426-3 allows man-in-the-middle attackers to execute commands. QuickConnect redirects inbound HTTPS requests to an unencrypted HTTP endpoint, exposing browser traffic to interception before synorelayd processes it; the exact command-construction path is undisclosed. Exploitation requires enabled QuickConnect, user interaction, and a network position permitting interception, while successful exploitation executes commands on the NAS.
Summary
What happened
CWE-201 in synorelayd in Synology DiskStation Manager before 6.2.3-25426-3 allows man-in-the-middle attackers to execute commands. QuickConnect redirects inbound HTTPS requests to an unencrypted HTTP endpoint, exposing browser traffic to interception before synorelayd processes it; the exact command-construction path is undisclosed. Exploitation requires enabled QuickConnect, user interaction, and a network position permitting interception, while successful exploitation executes commands on the NAS.
The record
- CVE
- CVE-2021-26566
- Published
- Feb 26, 2021
- Updated
- Sep 17, 2024
- Vendor
- Synology
- Product
- Synology DiskStation Manager
- Classifications
- CWE-201, T1557
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Feb 26, 2021CVE publishedPublication date reported by the CVE source.
- Sep 17, 2024Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=unspecified <6.2.3-25426-3
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
No public exploit references are available in this record.
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Technologies
Your stack
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Your stack
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