Unified Computing SystemHardware / appliance · Cisco
CVE-2012-4115
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 fabric-interconnect component in Cisco Unified Computing System (UCS) does not encrypt KVM virtual-media data, which allows man-in-the-middle attackers to obtain sensitive information by sniffing the network or modify this traffic by inserting packets into the client-server data stream, aka Bug ID CSCtr72964.
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 confidenceThe Cisco UCS fabric-interconnect component fails to encrypt KVM (Keyboard-Video-Mouse) virtual-media traffic, transmitting data in cleartext. This allows man-in-the-middle attackers on the network path to passively sniff sensitive information from KVM sessions or actively inject/modify packets to manipulate the client-server communication stream.
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 Computing SystemHardware / appliance
all versionsCVSS 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
- M
- Authentication
- None
- Confidentiality
- Partial
- Integrity
- Partial
- Availability
- None
AV:N/AC:M/Au:N/C:P/I:P/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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Confirm Cisco UCS fabric-interconnect in useIdentify if the system is a Cisco UCS environment by logging into UCS Manager and checking the system inventory or chassis overview for fabric-interconnect componentsAffected if The system is a Cisco UCS fabric-interconnect and all versions are affected until the patch is applied
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Locate KVM virtual-media configurationIn UCS Manager, navigate to the KVM virtual-media settings under the fabric-interconnect or server management section where KVM configuration is storedAffected if KVM virtual-media is enabled and accessible through the UCS Manager interface
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Check KVM encryption statusExamine the KVM virtual-media configuration settings for an encryption or security option; verify whether encryption is enabled for the KVM session trafficAffected if KVM virtual-media is present but encryption is disabled or not explicitly enabled in the configuration
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Verify patch CSCtr72964 applicationCheck the UCS Manager version or firmware version associated with the fabric-interconnect; compare against the version that includes the CSCtr72964 fix or check the patch status in the systemAffected if The fabric-interconnect firmware or UCS Manager version does not include the CSCtr72964 patch that enables KVM encryption
A user is affected if they are running any version of Cisco UCS fabric-interconnect with KVM virtual-media enabled and the CSCtr72964 patch has not been applied to enable encryption for KVM traffic.
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 patch for bug ID CSCtr72964 to enable encryption for KVM virtual-media traffic in the UCS fabric-interconnect. Until patched, restrict network access to the management interface using VLAN segmentation or ACLs to reduce MITM exposure.
Fix this in Unified Computing System
Scoped from the published advisory
- Consultation4.0 h
- Implementation6.0 h
- Testing3.0 h
- Review / QA2.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $4,304.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2012-4115 — 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-2012-4115 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
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