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Identity Services EngineApplication · Cisco

CVE-2019-1673

MEDIUM · 5.4 CVSS v3.0 Published 2019-02-08
Mitigation only
No fix yet — a mitigation exists. There is no fixed release. A documented workaround reduces exposure in the meantime.
See remediation →
58/100
Remediation priority · Elevated
Remotely reachable

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 · unedited
A vulnerability in the web-based management interface of Cisco Identity Services Engine (ISE) could allow an authenticated, remote attacker to conduct a cross-site scripting (XSS) attack against a user of the web-based interface. The vulnerability is due to insufficient input validation of some parameters passed to the web-based management interface. An attacker could exploit this vulnerability by convincing a user of the interface to click a specific link. A successful exploit could allow the attacker to execute arbitrary script code in the context of the interface or allow the attacker to access sensitive browser-based information. For information about fixed software releases, consult the Cisco bug ID at https://quickview.cloudapps.cisco.com/quickview/bug/CSCvn64652. When considering software upgrades, customers are advised to regularly consult the advisories for Cisco products, which are available from the Cisco Security Advisories and Alerts page, to determine exposure and a complete upgrade solution.

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 confidence

This is a cross-site scripting (XSS) vulnerability in the web-based management interface of Cisco Identity Services Engine (ISE). The vulnerability stems from insufficient input validation on parameters passed to the web interface, allowing an authenticated attacker to inject malicious script code that executes in the context of a user's browser when they click a crafted link.

MitigationApply the appropriate software fix from Cisco (reference bug CSCvn64652) after checking the Cisco Security Advisories page for the applicable version. Users should be warned not to click untrusted links until the patch is applied.

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 EngineApplication
Affected:= 2.5\(0.353\)

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
Low
User interaction
Required
Scope
Changed
Confidentiality
Low
Integrity
Low
Availability
None

CVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/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 checks

Work through these to decide whether this CVE applies to you.

  1. Confirm Cisco ISE is installed
    Access the Cisco ISE CLI and run 'show version' to identify the installation, or check if the admin web portal is accessible at the expected management URL.
    Affected if Cisco ISE software is present in the environment
  2. Check the installed version number
    From the CLI, run 'show version' and locate the version string. Alternatively, log into the ISE admin web interface and navigate to Administration > System > Settings > Product Version to view the exact release.
    Affected if The version displayed is exactly 2.5(0.353)
  3. Verify the web-based management interface is enabled
    From the CLI, run 'show running-config | include web' or check via the admin UI under Administration > System > Settings > Web Portal Settings to confirm the management web portal is active.
    Affected if The ISE web-based management interface is enabled and accessible
  4. Confirm admin or operator access is available
    Check if any local or external (LDAP/AD/RADIUS) admin accounts are configured by navigating to Administration > Identity Management > Identities > Users in the web UI, or run 'show running-config | include user' from the CLI.
    Affected if Authenticated administrative or operator accounts exist that can access the web management interface

A user is affected if Cisco ISE version 2.5(0.353) is installed AND the web-based management interface is enabled with at least one active administrative account.

Generated from the published advisory. Verify against your own configuration.

Check your environment

Paste your version and any relevant configuration and it will be compared against the affected criteria above. Do not include secrets or credentials.

AI-assisted, checked against the advisory. Informational, not a guarantee.

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 data
Mitigation available No clean upgrade yet — mitigate in the meantime
Mitigation

Apply the appropriate software fix from Cisco (reference bug CSCvn64652) after checking the Cisco Security Advisories page for the applicable version. Users should be warned not to click untrusted links until the patch is applied.

Fix this in Identity Services Engine Scoped from the published advisory
  • Consultation4.0 h
  • Implementation8.0 h
  • Testing4.0 h
  • Review / QA2.0 h
18.0 hours of engineering $3,200
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References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.

Primary sources

Practitioner notes

Contributed

Peer-ranked notes from engineers who’ve handled CVE-2019-1673 in production — separate from our analysis above.

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What this is

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.

What belongs here
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  • Version or environment caveats, and links to real fixes
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