dbcve.org
Debian LinuxOperating system · Debian

CVE-2023-40462

HIGH · 7.5 CVSS v3.1 Published 2023-12-04
Fix available
A fix is available. Upgrade to after 4.16.0 or later.
See remediation →
84/100
Remediation priority · High
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
The ACEManager component of ALEOS 4.16 and earlier does not perform input sanitization during authentication, which could potentially result in a Denial of Service (DoS) condition for ACEManager without impairing other router functions. ACEManager recovers from the DoS condition by restarting within ten seconds of becoming unavailable.

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 · moderate confidence

The ACEManager component in ALEOS 4.16 and earlier lacks proper input sanitization during the authentication process, which could allow attackers to trigger a denial of service condition. While the component auto-restarts within ten seconds, this creates a recurring disruption to ACEManager services without affecting other router functions.

MitigationUpdate to a patched version of ALEOS if available. If no patch exists, implement network access controls to limit exposure to the ACEManager interface and consider rate-limiting authentication endpoints.

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
Debian LinuxOperating system
Affected:= 10.0
AleosOperating system
Affected:<= 4.16.0

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
None
Integrity
None
Availability
High

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/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 the ALEOS version on the device
    Access the router's CLI or web interface and check the firmware/version information. On the CLI, this is typically shown at login or via a 'show system info' or 'version' command.
    Affected if The displayed version is 4.16.0 or earlier, or if the version string contains a number less than or equal to 4.16 in the firmware version field.
  2. Confirm the device is running Sierra Wireless ALEOS
    Check the system information banner during CLI login, or examine the web interface header for 'ALEOS' branding, or run 'show system' command which typically displays the platform as 'Sierra Wireless' or similar.
    Affected if The system explicitly identifies as running Sierra Wireless ALEOS firmware.
  3. Verify ACEManager service availability and stability
    If SSH/telnet access is available to the underlying Linux shell (not the ALEOS CLI), run commands to check process status: look for ACEManager in the process list (ps aux | grep -i ace) and check for frequent restarts or crash logs.
    Affected if ACEManager process is absent, crashes repeatedly, or system logs show the service restarting frequently (within seconds to minutes).
  4. Check network exposure of ACEManager interface
    Review firewall rules or network access control lists to determine if port 8080, 8443, or the ACEManager web interface ports are exposed to untrusted networks. Use 'show ip' or similar commands on the router to list listening services.
    Affected if ACEManager ports (commonly 8080/8443 for HTTP/HTTPS) are listening on WAN or untrusted interfaces without restriction.
  5. Identify if the system is Debian 10.0
    On the underlying Linux system (if accessible via debug/developer mode), run 'cat /etc/debian_version' or 'uname -a' to check the OS version.
    Affected if The system reports Debian version 10.0 and is running the ACEManager component.

The environment is affected if it runs Sierra Wireless ALEOS version 4.16.0 or earlier (or Debian 10.0 with ACEManager) and has ACEManager network access exposed, particularly if the service shows frequent unexpected restarts.

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 a release after 4.16.0
Interim mitigation

Update to a patched version of ALEOS if available. If no patch exists, implement network access controls to limit exposure to the ACEManager interface and consider rate-limiting authentication endpoints.

Fix this in Debian Linux Scoped from the published advisory
  • Consultation8.0 h
  • Implementation16.0 h
  • Testing12.0 h
  • Review / QA6.0 h
42.0 hours of engineering $7,360
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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-2023-40462 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