CVE-2017-11148
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 · uneditedServer-side request forgery (SSRF) vulnerability in link preview in Synology Chat before 1.1.0-0806 allows remote authenticated users to access intranet resources 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 confidenceServer-side request forgery (SSRF) vulnerability in Synology Chat's link preview feature allows authenticated users to trick the server into making arbitrary requests to internal/intranet resources. This occurs because user-supplied URLs in link previews are not properly validated before the server fetches them.
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<= 1.0.2-0159CVSS 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
- Low
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- None
- Availability
- None
CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/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.
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Verify Synology Chat is installedCheck your Synology NAS package manager or running services for the Synology Chat packageAffected if Synology Chat is present on the system
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Determine installed Synology Chat versionAccess Synology Chat package information through the Package Center or DSM control panel, or check via command line if availableAffected if The installed version is 1.0.2-0159 or earlier (any version up to and including 1.0.2-0159)
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Confirm link preview feature is enabledCheck Synology Chat settings or configuration for the link preview functionality (typically found in chat room or user preferences)Affected if Link preview feature is enabled and users can submit URLs for preview generation
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Review server network activity for internal requestsMonitor server logs or network connections for outbound requests from the Synology Chat service to internal/intranet IP addresses (such as 10.x.x.x, 192.168.x.x, 127.0.0.1)Affected if The server is making outbound requests to internal network addresses triggered by user-submitted URLs in chat
A user is affected if Synology Chat version 1.0.2-0159 or earlier is installed with the link preview feature enabled, as this combination allows authenticated users to exploit the SSRF vulnerability to access internal network resources.
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 dataUpdate Synology Chat to version 1.1.0-0806 or later, which includes proper validation of URLs in the link preview feature to prevent requests to internal network addresses.
- Consultation2.0 h
- Implementation1.0 h
- Testing2.0 h
- Review / QA1.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2017-11148 — 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-2017-11148 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
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- 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