dbcve.org
Ios XrOperating system · Cisco

CVE-2019-1710

CRITICAL · 9.8 CVSS v3.0 Published 2019-04-17
Fix available
A fix is available. Upgrade to 6.5.3 / 7.0.1 or later.
See remediation →
100/100
Remediation priority · Urgent
Remotely reachable No privileges 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 sysadmin virtual machine (VM) on Cisco ASR 9000 Series Aggregation Services Routers running Cisco IOS XR 64-bit Software could allow an unauthenticated, remote attacker to access internal applications running on the sysadmin VM. The vulnerability is due to incorrect isolation of the secondary management interface from internal sysadmin applications. An attacker could exploit this vulnerability by connecting to one of the listening internal applications. A successful exploit could result in unstable conditions, including both a denial of service and remote unauthenticated access to the device. This vulnerability has been fixed in Cisco IOS XR 64-bit Software Release 6.5.3 and 7.0.1, which will edit the calvados_boostrap.cfg file and reload the device.

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

A vulnerability in the sysadmin VM on Cisco ASR 9000 Series routers running Cisco IOS XR 64-bit Software allows an unauthenticated, remote attacker to access internal applications due to incorrect isolation of the secondary management interface. Successful exploitation enables denial of service and remote unauthenticated access to the device.

MitigationApply Cisco IOS XR 64-bit Software Release 6.5.3 or 7.0.1, which involves editing the calvados_bootstrap.cfg file and reloading the device.

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
Ios XrOperating system
Affected:< 6.5.3>= 7.0, < 7.0.1

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
None
User interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.0/AV:N/AC:L/PR:N/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 device model
    Run 'show version' or 'show platform' to confirm the hardware is a Cisco ASR 9000 Series router
    Affected if Device is not an ASR 9000 Series router (not affected)
  2. Check IOS XR version
    Run 'show version' and locate the IOS XR software version number
    Affected if Version is less than 6.5.3 OR version is 7.0.x (7.0.0 through 7.0.0) - these are in the affected range
  3. Verify secondary management interface exists
    Run 'show interface' or 'show running-config' to list management interfaces and look for a secondary management interface (typically mgmt0/1 or similar)
    Affected if A secondary management interface is configured and active
  4. Confirm sysadmin VM is accessible via secondary interface
    Attempt to access the sysadmin VM through the secondary management interface or verify its network configuration exists
    Affected if The secondary management interface provides access to the sysadmin VM (vulnerable isolation)

A user is affected if they have a Cisco ASR 9000 Series router running IOS XR versions 7.0.x or versions below 6.5.3, with a secondary management interface configured that exposes the sysadmin VM.

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.

dbcve · scoped
Upgrade available Upgrade to 6.5.3 / 7.0.1 or later
Fixed in 6.5.37.0.1
Interim mitigation

Apply Cisco IOS XR 64-bit Software Release 6.5.3 or 7.0.1, which involves editing the calvados_bootstrap.cfg file and reloading the device.

Recommended fix High confidence

Upgrade to Cisco IOS XR 6.5.3 or 7.0.1 (or later stable releases)

  1. Identify the current Cisco IOS XR version using 'show version' command
  2. Backup the current configuration
  3. Upgrade Cisco IOS XR to version 6.5.3 or 7.0.1 (or later stable release) using the appropriate ROMMON/boot process
  4. After upgrade, the system will automatically edit the calvados_bootstrap.cfg file
  5. Allow the device to reload as part of the upgrade process
  6. Verify the new version is running using 'show version'
  7. Confirm the fix is applied by checking that the secondary management interface is properly isolated
Caveat Standard IOS XR upgrade risks apply - ensure configuration backup and planned maintenance window for reload

Generated from the published advisory — verify against the referenced sources before acting.

Fix this in Ios Xr Scoped from the published advisory
  • Consultation3.0 h
  • Implementation4.0 h
  • Testing3.0 h
  • Review / QA2.0 h
12.0 hours of engineering $2,130
Get the upgrade done

An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $3,408.

Scan for this in your stack

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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-2019-1710 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