Unified Communications ManagerApplication · Cisco
CVE-2017-3877
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 · uneditedA vulnerability in the web framework of Cisco Unified Communications Manager (CallManager) could allow an unauthenticated, remote attacker to conduct a cross-site request forgery (CSRF) attack against a user of the web interface of the affected software. More Information: CSCvb70021. Known Affected Releases: 11.5(1.11007.2).
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 · moderate confidenceCross-site request forgery (CSRF) vulnerability in the web framework of Cisco Unified Communications Manager (CallManager) allows an unauthenticated, remote attacker to trick authenticated users into executing unintended actions via malicious requests through the web interface.
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
Unified Communications ManagerApplication
= 11.5\(1.11.007.2\)CVSS 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
- Unchanged
- Confidentiality
- None
- Integrity
- High
- Availability
- None
CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/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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Identify installed CUCM versionLog into the Cisco Unified Communications Manager Administration interface and navigate to About > Version, or use the CLI command 'show version' via SSH to the CUCM serverAffected if The displayed version matches exactly 11.5(1.11007.2)
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Confirm web interface is accessibleAttempt to access the CUCM web administration URL (typically https://<server>/ccmadmin or /ccmweb) from a browserAffected if The web interface loads and accepts authentication, indicating the vulnerable web framework component is active
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Verify CSRF token implementationInspect the CUCM web interface forms by viewing page source; check if each form submission includes a unique anti-CSRF token parameterAffected if Forms lack anti-CSRF tokens or use predictable/session-independent tokens, indicating the vulnerability is present
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Check Origin/Referer header validationSend a crafted request without proper Origin or Referer headers to the CUCM web endpoints using a tool like curl; observe if the request is processed without rejectionAffected if The web framework accepts requests without validating Origin/Referer headers, confirming the CSRF protection is missing
You are affected if your installed Cisco Unified Communications Manager version is exactly 11.5(1.11007.2) and the web interface is accessible without CSRF protections in place.
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 dataApply the Cisco security update/patch for the affected CUCM release (11.5(1.11007.2)) per CSCvb70021; implement anti-CSRF tokens and Origin/Referer header validation as compensating controls if immediate patching is not feasible.
Fix this in Unified Communications Manager
Scoped from the published advisory
- Consultation4.0 h
- Implementation8.0 h
- Testing6.0 h
- Review / QA4.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $6,176.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2017-3877 — 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-2017-3877 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
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