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AosOperating system · Alcatel

CVE-2008-4383

HIGH · 10.0 CVSS v2.0 Published 2008-10-03
Fix available
A fix is available. Upgrade to 5.1.6.463.r02 / 5.4.1.429.r01 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
Stack-based buffer overflow in the Agranet-Emweb embedded management web server in Alcatel OmniSwitch OS7000, OS6600, OS6800, OS6850, and OS9000 Series devices with AoS 5.1 before 5.1.6.463.R02, 5.4 before 5.4.1.429.R01, 6.1.3 before 6.1.3.965.R01, 6.1.5 before 6.1.5.595.R01, and 6.3 before 6.3.1.966.R01 allows remote attackers to execute arbitrary code via a long Session cookie.

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

Stack-based buffer overflow in Alcatel's Agranet-Emweb embedded web server allows remote attackers to execute arbitrary code via a specially crafted long Session cookie. The vulnerability affects multiple OmniSwitch series (OS7000, OS6600, OS6800, OS6850, OS9000) running affected AoS versions.

MitigationApply vendor-supplied firmware patches (AoS 5.1.6.463.R02, 5.4.1.429.R01, 6.1.3.965.R01, 6.1.5.595.R01, or 6.3.1.966.R01 or later) to all affected devices. Consider restricting web management interface access to trusted networks until patching is complete.

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
AosOperating system
Affected:>= 5.1, < 5.1.6.463.r02>= 5.4, < 5.4.1.429.r01>= 6.1.3, < 6.1.3.965.r01>= 6.1.5, < 6.1.5.595.r01>= 6.3, < 6.3.1.966.r01

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
Complete
Integrity
Complete
Availability
Complete

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

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 OmniSwitch model
    Log into the switch CLI and run 'show system' or 'show version' to confirm the device model (OS7000, OS6600, OS6800, OS6850, or OS9000)
    Affected if The device is not one of these OmniSwitch series models (not affected)
  2. Determine the installed AoS version
    Run 'show system' or 'show version' in the switch CLI to retrieve the AoS firmware version (for example, 5.4.0.456.R01)
    Affected if The version matches one of the affected ranges: >=5.1 but <5.1.6.463.r02, >=5.4 but <5.4.1.429.r01, >=6.1.3 but <6.1.3.965.r01, >=6.1.5 but <6.1.5.595.r01, or >=6.3 but <6.3.1.966.r01
  3. Verify the Agranet-Emweb web server is enabled
    Run 'show web' or 'show web-server status' to check if the embedded web management interface is enabled
    Affected if The web server is enabled and running (required for the vulnerability to be exploitable)
  4. Check web interface accessibility
    Run 'show ip http' or review the management VLAN configuration to determine if the web interface is accessible from network segments outside trusted administration networks
    Affected if The web interface is exposed to untrusted networks (increases exposure risk)

The environment is affected if the device is an OmniSwitch OS7000/OS6600/OS6800/OS6850/OS9000 running an AoS version within the affected ranges AND the Agranet-Emweb web server is enabled and accessible.

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 5.1.6.463.r02 / 5.4.1.429.r01 / 6.1.3.965.r01 or later
Fixed in 5.1.6.463.r025.4.1.429.r016.1.3.965.r01
Interim mitigation

Apply vendor-supplied firmware patches (AoS 5.1.6.463.R02, 5.4.1.429.R01, 6.1.3.965.R01, 6.1.5.595.R01, or 6.3.1.966.R01 or later) to all affected devices. Consider restricting web management interface access to trusted networks until patching is complete.

Recommended fix High confidence

Upgrade to AoS 5.1.6.463.R02, 5.4.1.429.R01, 6.1.3.965.R01, 6.1.5.595.R01, or 6.3.1.966.R01 (or later) depending on your product series

  1. 1. Identify the exact Alcatel OmniSwitch model (OS7000, OS6600, OS6800, OS6850, or OS9000) and current AoS firmware version via CLI (show version) or web interface
  2. 2. Access Alcatel support portal or official firmware download page to obtain the appropriate fixed firmware version for your model
  3. 3. For AoS 5.1.x: upgrade to version 5.1.6.463.R02 or later
  4. 4. For AoS 5.4.x: upgrade to version 5.4.1.429.R01 or later
  5. 5. For AoS 6.1.3.x: upgrade to version 6.1.3.965.R01 or later
  6. 6. For AoS 6.1.5.x: upgrade to version 6.1.5.595.R01 or later
  7. 7. For AoS 6.3.x: upgrade to version 6.3.1.966.R01 or later (if applicable)
  8. 8. Upload the firmware to the device via TFTP, FTP, or USB depending on device capabilities
Caveat Standard firmware upgrade risks apply - ensure backup of configuration, test in lab if possible, and plan maintenance window for reboot

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

Fix this in Aos 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-2008-4383 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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