CVE-2017-16775
Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.
NVD · uneditedImproper restriction of rendered UI layers or frames vulnerability in SSOOauth.cgi in Synology SSO Server before 2.1.3-0129 allows remote attackers to conduct clickjacking attacks via unspecified vectors.
Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.
dbcve analysis · high confidenceThis is a clickjacking vulnerability in Synology SSO Server's SSOOauth.cgi component. The application fails to properly restrict how its UI can be embedded in frames, allowing attackers to overlay invisible or disguised UI elements to trick users into performing unintended actions.
Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.
Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.
NVD · CPE data< 2.1.3-0129CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.
From the vector- Attack vector
- Network
- Complexity
- Low
- Privileges
- None
- User interaction
- Required
- Scope
- Changed
- Confidentiality
- Low
- Integrity
- Low
- Availability
- None
CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.
dbcve checksWork through these to decide whether this CVE applies to you.
-
Confirm Synology SSO Server is installedCheck if Synology SSO Server package or service is present on the system. This may be visible in Synology Package Center, as a running process, or by attempting to access the SSO Server login interface.Affected if The product is not installed or not in use, the vulnerability does not apply.
-
Identify the installed version of Synology SSO ServerLocate the installed version number of Synology SSO Server. This is typically found in the Synology Package Center, in the package info section, or via DSM package management commands.Affected if The installed version is less than 2.1.3-0129, making it vulnerable to this CVE.
-
Verify the SSOOauth.cgi component existsCheck if the SSOOauth.cgi endpoint is accessible on the Synology SSO Server. This is typically found at a path like /ssoauth/cgi/SSOOauth.cgi or similar under the SSO Server web root.Affected if The SSOOauth.cgi endpoint does not exist, the specific component vulnerability does not apply.
-
Inspect HTTP response headers for frame embedding protectionMake an HTTP request to the SSOOauth.cgi endpoint (or the SSO Server login page) and examine the response headers. Look for X-Frame-Options header (should be DENY or SAMEORIGIN) or Content-Security-Policy header with frame-ancestors directive.Affected if The response lacks X-Frame-Options and CSP frame-ancestors headers, allowing the page to be embedded in frames and enabling clickjacking attacks.
A user is affected if Synology SSO Server is installed with version less than 2.1.3-0129 and the SSOOauth.cgi endpoint does not include X-Frame-Options or CSP frame-ancestors headers in its responses.
Generated from the published advisory. Verify against your own configuration.
Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.
From vendor data2.1.3-0129
Implement X-Frame-Options: DENY or SAMEORIGIN header, or use Content Security Policy with frame-ancestors directive to prevent the application from being rendered in iframes.
- Consultation2.0 h
- Implementation2.0 h
- Testing1.0 h
- Review / QA1.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $1,744.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2017-16775 — or any other known-vulnerable package — straight from your lock files. Free and open source; it runs locally and uploads nothing.
References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.
Primary sourcesPractitioner notes
ContributedPeer-ranked notes from engineers who’ve handled CVE-2017-16775 in production — separate from our analysis above.
The advisory tells you what broke. It rarely tells you what actually worked. If you’ve dealt with this one, that detail is what the next engineer is searching for.
- The version that genuinely resolved it — not the one the vendor claimed
- A config change or rule that shut the vector down
- A gotcha in the upgrade path that cost you an afternoon
No notes yet
Be the first to add a field note for this CVE — a mitigation you’ve verified, a version caveat, or a link to a working fix. Sign in above to contribute.
A place for practitioners to share what actually worked: a mitigation you’ve tested, a configuration change, a version- or environment-specific caveat, or a link to a verified patch. The most useful notes rise to the top as peers upvote them, so the signal stays high.
- Verified mitigations, workarounds, and config changes
- Version or environment caveats, and links to real fixes
- No weaponised exploit code, or anything meant to cause harm
- No spam, self-promotion, credentials, or personal data