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Unified Computing SystemApplication · Cisco

CVE-2019-1907

HIGH · 8.8 CVSS v3.1 Published 2019-08-21
Fix available
A fix is available. Upgrade to 4.0 or later.
See remediation →
94/100
Remediation priority · Urgent
Remotely reachable Zero-click

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 server of Cisco Integrated Management Controller (IMC) could allow an authenticated, remote attacker to set sensitive configuration values and gain elevated privileges. The vulnerability is due to improper handling of substring comparison operations that are performed by the affected software. An attacker could exploit this vulnerability by sending a crafted HTTP request to the affected software. A successful exploit could allow the attacker with read-only privileges to gain administrator privileges.

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

The vulnerability exists in the web server of Cisco IMC where improper substring comparison operations allow an authenticated attacker with read-only privileges to escalate to administrator privileges by sending crafted HTTP requests. The flaw enables privilege escalation through manipulation of configuration values via the web interface.

MitigationApply the vendor-supplied patch or firmware update from Cisco for Cisco IMC to address the improper substring comparison vulnerability.

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 SystemApplication
Affected:= 4.0\(1c\)hs3
Integrated Management Controller SupervisorApplication
Affected:< 4.0\(4b\)< 4.0\(2f\)

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
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/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 checks

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

  1. Identify Cisco IMC web service
    Access the Cisco IMC web interface by navigating to the IP address of the CIMC (Cisco Integrated Management Controller) or check if port 443/80 is open on the management IP
    Affected if The web interface is accessible and responds to HTTP/HTTPS requests
  2. Check CIMC firmware version
    In the web interface, go to Admin > Firmware Management or use the CLI: 'show firmware' to display the running firmware version
    Affected if Version equals 4.0(1c)hs3 for Cisco UCS, or is lower than 4.0(4b) or 4.0(2f) for Cisco IMC Supervisor
  3. Verify read-only user accounts
    In the web interface, go to Admin > User Management > Users or use CLI: 'show user' to list configured accounts and their privilege levels
    Affected if Read-only or non-administrator user accounts exist in the CIMC
  4. Confirm web server is enabled
    In the web interface, go to Admin > Network > Web Server Settings or check via CLI: 'show web-server' to verify the web server configuration
    Affected if Web server is enabled and accepting connections (this is required for exploitation)
  5. Review recent authentication logs
    In the web interface, go to Admin > Logs > Audit Logs or use CLI: 'show log' to review recent authentication and configuration change events
    Affected if There are authentication events from read-only accounts that coincide with privilege escalation attempts

Your environment is affected if Cisco IMC web interface is accessible AND the firmware version matches = 4.0(1c)hs3 (UCS) or is below 4.0(4b)/4.0(2f) (IMC Supervisor) AND read-only user accounts exist that could be exploited for privilege escalation.

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
Upgrade available Upgrade to 4.0 or later
Fixed in 4.0
Interim mitigation

Apply the vendor-supplied patch or firmware update from Cisco for Cisco IMC to address the improper substring comparison vulnerability.

Fix this in Unified Computing System Scoped from the published advisory
  • Consultation2.0 h
  • Implementation2.0 h
  • Testing4.0 h
  • Review / QA2.0 h
10.0 hours of engineering $1,720
Get the upgrade done

An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $2,752.

Scan for this in your stack

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dbcve dependency scanner

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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-2019-1907 in production — separate from our analysis above.

No notes yet

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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
  • 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