Identity Services Engine SoftwareApplication · Cisco
CVE-2016-1402
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 Active Directory (AD) integration component in Cisco Identity Service Engine (ISE) before 1.2.0.899 patch 7, when AD group-membership authorization is enabled, allows remote attackers to cause a denial of service (authentication outage) via a crafted Password Authentication Protocol (PAP) authentication request, aka Bug ID CSCun25815.
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 confidenceCisco ISE versions before 1.2.0.899 patch 7 contain a denial of service vulnerability in the Active Directory integration component. When AD group-membership authorization is enabled, a remote attacker can send a specially crafted PAP (Password Authentication Protocol) authentication request that causes an authentication outage, preventing legitimate users from authenticating.
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
Identity Services Engine SoftwareApplication
= 1.2.0.899CVSS 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
- None
- Scope
- Unchanged
- Confidentiality
- None
- Integrity
- None
- Availability
- High
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
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 ISE versionLog into the ISE admin GUI and navigate to Administration > System > Logging > Debug Log Configuration, or use the CLI command 'show version' to determine the installed Cisco ISE software version.Affected if The installed version is 1.2.0.899 and does not have patch 7 applied.
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Confirm AD group-membership authorization is enabledIn the ISE admin GUI, navigate to Policy > Policy Elements > Results > Authorization > Authorization Profiles, or check the relevant policy configuration to determine whether AD group-based authorization is active.Affected if AD group-membership authorization is enabled and the ISE version is 1.2.0.899 without patch 7.
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Verify PAP authentication protocol is in useReview the authentication settings in Policy > Authentication or check the active authentication protocols to see if PAP is permitted for external AD authentication.Affected if PAP authentication protocol is allowed for AD integrations on a vulnerable ISE version with AD group authorization enabled.
A Cisco ISE deployment is affected if it runs version 1.2.0.899 without patch 7 AND has AD group-membership authorization enabled with PAP authentication permitted.
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 ISE to version 1.2.0.899 patch 7 or later. As a temporary mitigation, consider disabling AD group-membership authorization if business requirements permit, though this may impact authorization policies.
Fix this in Identity Services Engine Software
Scoped from the published advisory
- Consultation4.0 h
- Implementation8.0 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 $5,120.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2016-1402 — 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-2016-1402 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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