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Yf325 FirmwareOperating system · Yifanwireless

CVE-2023-35968

CRITICAL · 9.8 CVSS v3.1 Published 2023-10-11
Mitigation only
No fix yet — a mitigation exists. There is no fixed release. A documented workaround reduces exposure in the meantime.
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
Two heap-based buffer overflow vulnerabilities exist in the gwcfg_cgi_set_manage_post_data functionality of Yifan YF325 v1.0_20221108. A specially crafted network request can lead to a heap buffer overflow. An attacker can send a network request to trigger these vulnerabilities.This integer overflow result is used as argument for the realloc function.

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

Heap-based buffer overflow in the gwcfg_cgi_set_manage_post_data function of Yifan YF325 v1.0_20221108. An integer overflow in size calculation is used as the argument to realloc(), allowing an attacker to overflow the heap via specially crafted network requests to the CGI management interface.

MitigationApply vendor firmware update when available; prior to patch, restrict network access to the device's management interface using firewall rules or network segmentation to prevent unauthenticated attackers from sending malicious requests.

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
Yf325 FirmwareOperating system
Affected:= 1.0_20221108

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
High
Integrity
High
Availability
High

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/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 device firmware version
    Access the device's web management interface (typically via HTTP/HTTPS on the LAN IP) and navigate to the System, Status, or About page to view the firmware version. Alternatively, check via CLI/SSH if remote management is enabled, or inspect the firmware binary file if obtained.
    Affected if The firmware version is 1.0_20221108 exactly.
  2. Verify CGI management interface is network-accessible
    Attempt to access the device's CGI endpoint on common management ports (80, 443, 8080). This can be done via browser or curl: curl http://<device_ip>/cgi-bin/<endpoint> (replace with actual CGI path known for this device).
    Affected if The CGI management interface responds to network requests, indicating it is exposed.
  3. Check if remote management is enabled
    Log into the device's web interface and navigate to Administration, System, or Network Settings to locate the 'Remote Management' or 'External Access' option. Verify whether CGI endpoints are reachable from external/WAN interfaces.
    Affected if Remote management or external access to the CGI interface is enabled, making the vulnerable function network-accessible.
  4. Confirm the vulnerable function exists in firmware
    If you have access to the firmware binary (via extraction or download), search for the string 'gwcfg_cgi_set_manage_post_data' using binwalk, strings, or a hex editor. This function must be present for the overflow to be exploitable.
    Affected if The gwcfg_cgi_set_manage_post_data function is present in the firmware.

The device is affected if it runs Yifan YF325 firmware version 1.0_20221108 and has the CGI management interface network-accessible (especially from external networks), enabling attackers to send malicious requests to trigger the heap overflow in gwcfg_cgi_set_manage_post_data.

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
Mitigation available No clean upgrade yet — mitigate in the meantime
Mitigation

Apply vendor firmware update when available; prior to patch, restrict network access to the device's management interface using firewall rules or network segmentation to prevent unauthenticated attackers from sending malicious requests.

Fix this in Yf325 Firmware Scoped from the published advisory
  • Consultation4.0 h
  • Implementation8.0 h
  • Testing6.0 h
  • Review / QA3.0 h
21.0 hours of engineering $3,680
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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-2023-35968 in production — separate from our analysis above.

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What this is

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