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Dhi Dss7016d S2 FirmwareOperating system · Dahuasecurity

CVE-2022-45434

MEDIUM · 5.9 CVSS v3.1 Published 2022-12-27
Patch available
A vendor patch is available. No clean upgrade release — apply the published patch.
See remediation →
68/100
Remediation priority · Elevated
Remotely reachable No privileges Zero-click Patch available

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
Some Dahua software products have a vulnerability of unauthenticated un-throttled ICMP requests on remote DSS Server. After bypassing the firewall access control policy, by sending a specific crafted packet to the vulnerable interface, an attacker could exploit the victim server to launch ICMP request attack to the designated target host.

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
How this class of weakness works · CWE-770

The application allocates memory, connections, or handles in response to a request without enforcing any cap, so a modest amount of malicious traffic exhausts the resource and denies service to everyone else. The fix is enforcing quotas, limits, and timeouts on what any single request or client can consume.

General guidance for the resource allocation without limits class — the official description and references above are authoritative for this specific CVE. Want a bespoke review and a reviewed fix? Ask our team →

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
Dhi Dss7016d S2 FirmwareOperating system
Affected:= 1.001.0000001.2= 8.0.2= 8.0.4= 8.1
Dhi Dss7016dr S2 FirmwareOperating system
Affected:= 1.001.0000001.2= 8.0.2= 8.0.4= 8.1
Dhi Dss4004 S2 FirmwareOperating system
Affected:= 1.001.0000001.2= 8.0.2= 8.0.4= 8.1
Dss ExpressApplication
Affected:= 7.002.1760000.2= 8.0.2= 8.0.4= 8.1= 8.1.1
Dss ProfessionalApplication
Affected:= 7.002.1760000.2= 8.0.2= 8.0.4= 8.1= 8.1.1

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

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/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
Patch available Apply the vendor patch
Vendor patch www.dahuasecurity.com →
Recommended fix Moderate confidence

Obtain the fixed firmware version from vendor advisory at https://www.dahuasecurity.com/support/cybersecurity/details/1137

  1. 1. Identify the specific Dahua DSS product model and current firmware version from the affected products list (Dss7016d S2, Dss7016dr S2, Dss4004 S2, Dss Express, or Dss Professional).
  2. 2. Navigate to the vendor's cybersecurity support page at https://www.dahuasecurity.com/support/cybersecurity/details/1137 to obtain the official patch/fixed version information.
  3. 3. Download the firmware update for your specific product model from Dahua's official support portal.
  4. 4. Review the firmware upgrade instructions provided by Dahua before proceeding.
  5. 5. Apply the firmware update following the vendor's documented upgrade procedure.
  6. 6. After upgrading, verify that the ICMP request resource limits are now properly throttled by checking the system configuration or consulting vendor documentation.
Caveat Firmware upgrades may require system downtime and should be tested in a staging environment before production deployment

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

We can apply and verify the patch for your build — typical engagement from $1,600. Get the patch applied

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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-2022-45434 in production — separate from our analysis above.

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