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Stormshield Network SecurityApplication · Stormshield

CVE-2023-47091

HIGH · 7.5 CVSS v3.1 Published 2023-12-25
Fix available
A fix is available. Upgrade to 4.3.23 / 4.6.10 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
An issue was discovered in Stormshield Network Security (SNS) SNS 4.3.13 through 4.3.22 before 4.3.23, SNS 4.6.0 through 4.6.9 before 4.6.10, and SNS 4.7.0 through 4.7.1 before 4.7.2. An attacker can overflow the cookie threshold, making an IPsec connection impossible.

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

This is a denial-of-service vulnerability in Stormshield Network Security (SNS) products where an attacker can overflow the IPsec cookie threshold, preventing new IPsec connections from being established. The vulnerability affects SNS versions 4.3.13-4.3.22, 4.6.0-4.6.9, and 4.7.0-4.7.1.

MitigationUpgrade to SNS versions 4.3.23, 4.6.10, or 4.7.2 or later to patch the cookie threshold overflow vulnerability.

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
Stormshield Network SecurityApplication
Affected:>= 4.3.13, < 4.3.23>= 4.6.0, < 4.6.10>= 4.7.0, < 4.7.2

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 Stormshield SNS product
    Log into the Stormshield admin interface or CLI and confirm the product is Stormshield Network Security (SNS). In the CLI, this may be visible in the system information or banner.
    Affected if The device is not running Stormshield Network Security product.
  2. Check the SNS firmware version
    Use the CLI command `version` or `show system info` to retrieve the installed SNS firmware version. Alternatively, check the dashboard or About section in the web admin interface.
    Affected if The installed version falls within 4.3.13-4.3.22, 4.6.0-4.6.9, or 4.7.0-4.7.1.
  3. Verify IPsec is configured
    In the SNS admin interface, navigate to the IPsec section or use CLI command `ipsec status` or `show ipsec configuration` to confirm IPsec tunnels or policies are defined.
    Affected if No IPsec tunnels or policies are configured, as the vulnerability specifically affects IPsec cookie handling.
  4. Check for IPsec connection failures
    Review IPsec logs using `ipsec statusall` or check the log viewer for error messages related to cookie threshold, connection failures, or IPsec tunnel bring-up failures.
    Affected if IPsec connections are failing or logs indicate cookie threshold has been reached.

The environment is affected if the installed SNS version is 4.3.13-4.3.22, 4.6.0-4.6.9, or 4.7.0-4.7.1 AND IPsec is actively configured or in use.

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 4.3.23 / 4.6.10 / 4.7.2 or later
Fixed in 4.3.234.6.104.7.2
Interim mitigation

Upgrade to SNS versions 4.3.23, 4.6.10, or 4.7.2 or later to patch the cookie threshold overflow vulnerability.

Recommended fix High confidence

4.3.23 (for 4.3.x branch), 4.6.10 (for 4.6.x branch), 4.7.2 (for 4.7.x branch)

  1. 1. Identify the currently installed SNS version using the CLI command 'fwadmin -v' or through the web interface under Status > System
  2. 2. Based on your current branch, plan the upgrade path: For 4.3.x branch: upgrade to 4.3.23; For 4.6.x branch: upgrade to 4.6.10; For 4.7.x branch: upgrade to 4.7.2
  3. 3. Download the appropriate SNS update from the Stormshield customer portal (https://www.stormshield.com/products/sns/)
  4. 4. Back up the current SNS configuration using 'fwadmin -s backup' or via the web interface under Configuration > Backup
  5. 5. Apply the update following Stormshield's standard upgrade procedure: upload the .ntar file via the web interface under Configuration > Update > Software update, or via CLI using 'fwadmin -u <update_file>'
  6. 6. After reboot, verify the new version is installed using 'fwadmin -v' and confirm the version matches or exceeds the fixed release for your branch
  7. 7. Test IPsec connections to confirm the vulnerability is remediated
Caveat Minor version upgrades within the same branch typically have no breaking changes; always review Stormshield release notes before upgrading

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

Fix this in Stormshield Network Security Scoped from the published advisory
  • Consultation2.0 h
  • Implementation3.0 h
  • Testing2.0 h
  • Review / QA1.0 h
8.0 hours of engineering $1,420
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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-2023-47091 in production — separate from our analysis above.

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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