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Asr 5000 SoftwareApplication · Cisco

CVE-2015-6351

MEDIUM · 5.0 CVSS v2.0 Published 2015-10-30
Mitigation only
No fix yet — a mitigation exists. There is no fixed release. A documented workaround reduces exposure in the meantime.
See remediation →
59/100
Remediation priority · Elevated
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
Cisco ASR 5500 System Architecture Evolution (SAE) Gateway devices with software 19.1.0.61559 and 19.2.0 allow remote attackers to cause a denial of service (BGP process restart) via a crafted header in a BGP packet, aka Bug ID CSCuw65781.

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 Cisco ASR 5500 System Architecture Evolution Gateway devices running software versions 19.1.0.61559 and 19.2.0. Remote attackers can send BGP packets with malformed headers to trigger a BGP process restart, causing denial of service. This is a protocol-level parsing flaw in the BGP implementation.

MitigationApply the Cisco patch for Bug ID CSCuw65781 by upgrading to a fixed software version. As an interim measure, implement BGP message validation and rate limiting at network edges to filter malformed packets.

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
Asr 5000 SoftwareApplication
Affected:= 19.1.0.61559= 19.2.0

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
Authentication
None
Confidentiality
None
Integrity
None
Availability
Partial

AV:N/AC:L/Au:N/C:N/I:N/A:P

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 the device model
    Check if the device is a Cisco ASR 5500 or ASR 5000 System Architecture Evolution Gateway by running 'show hardware' or 'show system' command
    Affected if Device model is Cisco ASR 5500 or ASR 5000
  2. Determine the installed software version
    Run 'show version' or 'show software' command to retrieve the installed software version number
    Affected if Version matches 19.1.0.61559 or 19.2.0 exactly
  3. Verify BGP is configured
    Run 'show bgp summary' or 'show ip bgp' to check if BGP process is running and configured
    Affected if BGP is enabled and a neighbor relationship is established
  4. Check BGP configuration for the vulnerable routing instance
    Run 'show running-config bgp' to confirm BGP is actively configured on the system
    Affected if BGP configuration exists and the system processes BGP packets

A user is affected if they have a Cisco ASR 5500/5000 running exactly version 19.1.0.61559 or 19.2.0 with BGP enabled and processing incoming BGP packets.

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 Cisco patch for Bug ID CSCuw65781 by upgrading to a fixed software version. As an interim measure, implement BGP message validation and rate limiting at network edges to filter malformed packets.

Fix this in Asr 5000 Software Scoped from the published advisory
  • Consultation6.0 h
  • Implementation12.0 h
  • Testing6.0 h
  • Review / QA4.0 h
28.0 hours of engineering $4,980
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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-2015-6351 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