Telepresence Mcu SoftwareApplication · Cisco
CVE-2014-3397
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 · uneditedThe network stack in Cisco TelePresence MCU Software before 4.3(2.30) allows remote attackers to cause a denial of service (memory consumption) via crafted TCP packets, aka Bug ID CSCtz35468.
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 confidenceA vulnerability exists in the network stack of Cisco TelePresence MCU Software versions prior to 4.3(2.30). Remote attackers can send specially crafted TCP packets to trigger excessive memory consumption, resulting in denial of service. The vulnerability is caused by insufficient validation of incoming TCP packets in the network stack.
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
Telepresence Mcu SoftwareApplication
<= 4.3\(2.18\)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
- Authentication
- None
- Confidentiality
- None
- Integrity
- None
- Availability
- Complete
AV:N/AC:L/Au:N/C:N/I:N/A:C
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 Cisco TelePresence MCU Software installationLocate the Cisco TelePresence MCU device or software installation in your environment. This is typically a dedicated conferencing device or virtual appliance.Affected if The product is not Cisco TelePresence MCU Software
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Determine the installed software versionAccess the MCU administrative interface (web UI or CLI) and navigate to the version or system information page. Common CLI command: 'show system' or 'version'. In the web UI, look under Help > About or System > Information.Affected if Unable to retrieve the software version
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Compare version against affected rangeCompare your installed version number to the affected range: versions <= 4.3(2.18). Note the full version string including the build number (e.g., 4.3(2.18), 4.3(2.10), etc.).Affected if Installed version is 4.3(2.18) or earlier, or if the version string cannot be determined but is known to be older than 4.3(2.30)
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Verify network exposureConfirm whether the TelePresence MCU is directly accessible from untrusted networks. Check firewall rules, ACLs, or network segmentation that may limit TCP access to the device.Affected if The device accepts TCP connections from untrusted or internet-facing networks (this does not confirm vulnerability but is required for exploitation)
You are affected if Cisco TelePresence MCU Software version 4.3(2.18) or earlier is installed and the device is network accessible.
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 dataUpgrade Cisco TelePresence MCU Software to version 4.3(2.30) or later to patch the vulnerability. As a temporary mitigation, consider restricting network access to trusted sources if feasible.
Fix this in Telepresence Mcu Software
Scoped from the published advisory
- Consultation2.0 h
- Implementation2.0 h
- Testing4.0 h
- Review / QA2.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2014-3397 — 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-2014-3397 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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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