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SonicosOperating system · Sonicwall

CVE-2023-41711

MEDIUM · 6.5 CVSS v3.1 Published 2023-10-17
Fix available
A fix is available. Upgrade to 6.5.4.4-44v-21-2340 / 6.5.4.13-105n or later.
See remediation →
71/100
Remediation priority · Elevated
Remotely reachable 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
SonicOS post-authentication Stack-Based Buffer Overflow Vulnerability in the sonicwall.exp, prefs.exp URL endpoints lead to a firewall crash.

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

Stack-based buffer overflow vulnerability in SonicOS firewall affecting the sonicwall.exp and prefs.exp URL endpoints. Exploitation requires valid administrative credentials and can cause the firewall to crash, resulting in denial of service.

MitigationApply vendor-provided patches from SonicWall when available. Until patched, restrict administrative interface access to trusted IPs only and monitor for unauthorized authentication attempts.

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
SonicosOperating system
Affected:< 7.0.1-5145< 6.5.4.4-44v-21-2340< 6.5.4.13-105n

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

CVSS:3.1/AV:N/AC:L/PR:L/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 installed SonicOS version
    Log into the SonicWall firewall management interface and navigate to the System > Status page, or use the CLI command 'show version' to retrieve the firmware version.
    Affected if The installed version is below 7.0.1-5145, below 6.5.4.4-44v-21-2340, or below 6.5.4.13-105n.
  2. Determine SonicOS version branch
    Check whether the firewall runs Sonicos 7.0.x, 6.5.4.4.x, or 6.5.4.13.x branch by examining the version string from the previous step.
    Affected if The version belongs to any of the three affected branches and is lower than the corresponding patch version.
  3. Verify administrative interface accessibility
    Confirm whether the SonicWall web management interface (HTTPS on port 443) or SSH admin port is accessible from untrusted networks by reviewing firewall access rules and external interface bindings.
    Affected if The administrative interface is exposed to untrusted or internet-facing networks without IP restriction.
  4. Inspect access to vulnerable URL endpoints
    Attempt to access or verify the presence of the sonicwall.exp and prefs.exp endpoints via the web interface, or check the HTTP/HTTPS service configuration for these endpoint mappings.
    Affected if The sonicwall.exp or prefs.exp endpoints are enabled and reachable.

The environment is affected if the installed SonicOS version falls below any of the three specified version thresholds AND the administrative interface or vulnerable endpoints are accessible to an attacker with valid credentials.

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 6.5.4.4-44v-21-2340 / 6.5.4.13-105n / 7.0.1-5145 or later
Fixed in 6.5.4.4-44v-21-23406.5.4.13-105n7.0.1-5145
Interim mitigation

Apply vendor-provided patches from SonicWall when available. Until patched, restrict administrative interface access to trusted IPs only and monitor for unauthorized authentication attempts.

Recommended fix Moderate confidence

Sonicos 7.0.1-5145 or later; or Sonicos 6.5.4.4-44v-21-2340 or later; or Sonicos 6.5.4.13-105n or later

  1. 1. Identify the current SonicOS version running on the affected SonicWall firewall device
  2. 2. Determine which version branch is in use (7.0.x, 6.5.4.4-x, or 6.5.4.13-x)
  3. 3. Download the appropriate fixed firmware version from the SonicWall support portal (psirt.global.sonicwall.com) matching your device model
  4. 4. For Sonicos 7.0.x branch: upgrade to version 7.0.1-5145 or later
  5. 5. For Sonicos 6.5.4.4-x branch: upgrade to version 6.5.4.4-44v-21-2340 or later
  6. 6. For Sonicos 6.5.4.13-x branch: upgrade to version 6.5.4.13-105n or later
  7. 7. Upload the firmware via the SonicWall management interface (HTTPS or local console)
  8. 8. Apply the firmware upgrade and allow the device to reboot
Caveat Minor firmware upgrades typically retain configuration; however, always backup configuration before upgrading

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

Fix this in Sonicos Scoped from the published advisory
  • Consultation4.0 h
  • Implementation8.0 h
  • Testing6.0 h
  • Review / QA2.0 h
20.0 hours of engineering $3,500
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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-2023-41711 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