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Vsp Operating System SoftwareApplication · Avaya

CVE-2016-2783

CRITICAL · 9.8 CVSS v3.0 Published 2017-01-23
Fix available
A fix is available. Upgrade to after 4.2.2.0 or later.
See remediation →
100/100
Remediation priority · Urgent
Public exploit 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
Avaya Fabric Connect Virtual Services Platform (VSP) Operating System Software (VOSS) before 4.2.3.0 and 5.x before 5.0.1.0 does not properly handle VLAN and I-SIS indexes, which allows remote attackers to obtain unauthorized access via crafted Ethernet frames.

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

A detailed technical summary for this CVE is being prepared.

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
Vsp Operating System SoftwareApplication
Affected:<= 4.2.2.0= 5.0.0.0

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
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

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 a release after 4.2.2.0
Recommended fix High confidence

VOSS 4.2.3.0 or later (4.x branch); VOSS 5.0.1.0 or later (5.x branch)

  1. 1. Identify the current installed VOSS version using 'show software' or 'show version' command
  2. 2. If running version 4.2.2.0 or earlier, upgrade to version 4.2.3.0 or later in the 4.x branch
  3. 3. If running version 5.0.0.0, upgrade to version 5.0.1.0 or later in the 5.x branch
  4. 4. Download the appropriate firmware/software from Avaya support portal (support.avaya.com)
  5. 5. Upload the new software image to the VSP switch using TFTP, FTP, or USB transfer
  6. 6. Activate the new software image with 'software add <image>' and 'software activate <image>' commands
  7. 7. Verify the upgrade was successful with 'show software' confirming the new version is running
  8. 8. After upgrade, verify the VLAN and I-SIS index handling has been patched by confirming normal operation
Caveat Standard firmware upgrade risks apply - ensure backup of configuration before proceeding; test in non-production environment first

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

We can identify the exact fixed release, upgrade, and verify it in staging — typical engagement from $2,300. Get the upgrade done

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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-2016-2783 in production — separate from our analysis above.

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What this is

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