Ips Sensor SoftwareApplication · Cisco
CVE-2015-0631
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 · uneditedRace condition in the SSL implementation on Cisco Intrusion Prevention System (IPS) devices allows remote attackers to cause a denial of service by making many management-interface HTTPS connections during the key-regeneration phase of an upgrade, aka Bug ID CSCui25688.
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 confidenceA race condition vulnerability exists in the SSL implementation on Cisco Intrusion Prevention System (IPS) devices. During the key-regeneration phase of a software upgrade, an attacker can trigger a denial of service by initiating numerous management-interface HTTPS connections, exploiting the timing window where SSL keys are being regenerated.
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
Ips Sensor SoftwareApplication
= 7.2\(1\)e4= 7.2\(2\)e4CVSS 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
- None
- Integrity
- None
- Availability
- Complete
AV:N/AC:M/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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Confirm device is a Cisco IPS SensorIdentify the hardware model and confirm it is a Cisco Intrusion Prevention System sensor device. Check the device inventory or running configuration for IPS-specific modules.Affected if Device is not a Cisco IPS sensor - this CVE only applies to Cisco IPS devices
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Check installed software versionExecute 'show version' or 'show ips version' on the IPS CLI to retrieve the installed Cisco IPS Sensor Software version.Affected if Version is 7.2(1)e4 or 7.2(2)e4 - these are the only affected versions listed
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Verify management interface HTTPS accessCheck if the IPS management interface (typically management0/0) is configured for HTTPS access and is reachable from network segments. Review access-list configurations and interface settings.Affected if Management interface HTTPS is externally accessible - the attack requires HTTPS connections to the management interface
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Determine if upgrade with key regeneration occurred recentlyReview recent system logs, upgrade history, or use 'show upgrade' commands to identify if a software upgrade was performed. The vulnerability triggers during the key-regeneration phase of an upgrade.Affected if A software upgrade was recently performed or is in progress - the race condition only occurs during the key-regeneration phase of an upgrade
The environment is affected if it is a Cisco IPS Sensor running version 7.2(1)e4 or 7.2(2)e4 with an accessible management interface, specifically during or around the time of a software upgrade operation.
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 fix for Bug ID CSCui25688 when available. Until then, restrict access to the management interface using network segmentation or firewall rules to prevent untrusted external hosts from reaching the IPS management plane during upgrade operations.
Fix this in Ips Sensor Software
Scoped from the published advisory
- Consultation4.0 h
- Implementation3.0 h
- Testing4.0 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 $3,680.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2015-0631 — 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-2015-0631 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
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