CVE-2019-9502
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 · uneditedThe Broadcom wl WiFi driver is vulnerable to a heap buffer overflow. If the vendor information element data length is larger than 164 bytes, a heap buffer overflow is triggered in wlc_wpa_plumb_gtk. In the worst case scenario, by sending specially-crafted WiFi packets, a remote, unauthenticated attacker may be able to execute arbitrary code on a vulnerable system. More typically, this vulnerability will result in denial-of-service conditions.
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 · high confidenceHeap buffer overflow in Broadcom wl WiFi driver's wlc_wpa_plumb_gtk function, triggered when vendor information element data length exceeds 164 bytes. Remote unauthenticated attackers can exploit via specially-crafted WiFi packets, potentially achieving arbitrary code execution or causing denial-of-service.
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= 1.2all versionsCVSS 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
- Adjacent
- Complexity
- Low
- Privileges
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- High
- Availability
- High
CVSS:3.1/AV:A/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 checksWork through these to decide whether this CVE applies to you.
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Identify Broadcom wl WiFi driver usageCheck system information or network adapter details to determine if the device uses the Broadcom wl driver for WiFi connectivityAffected if The system uses the Broadcom wl driver for WiFi operations
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Check for Broadcom Bcm4339 chipsetInspect network hardware or WiFi adapter specifications to identify the chipset model; on Linux, 'lspci' or 'lsusb' may list wireless adapters, or check device datasheetsAffected if The WiFi hardware is based on the Broadcom Bcm4339 chipset
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Verify Synology Router Manager versionAccess Synology Router Manager web interface or check system version via CLI if available; look for version 1.2 specificallyAffected if Synology Router Manager version 1.2 is installed
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Confirm WiFi is enabledCheck wireless interface status via 'iwconfig' or similar tool, or verify in router web interface that WiFi radio is activeAffected if WiFi is currently enabled and broadcasting
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Review system logs for WiFi driver anomaliesExamine kernel logs (dmesg) or system logs for crash entries, memory corruption indicators, or unexpected reboots potentially linked to the WiFi driverAffected if Logs show crashes or instability in the WiFi driver component since the vulnerability publication date
You are affected if your system uses the Broadcom wl driver with Bcm4339 hardware, runs Synology Router Manager 1.2, and has WiFi enabled, making it susceptible to the 164-byte vendor IE overflow.
Generated from the published advisory. Verify against your own configuration.
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 dataApply vendor-supplied firmware/driver patch for Broadcom wl; if unavailable, disable WiFi or implement network-level filtering to block malformed vendor information elements.
- Consultation4.0 h
- Implementation2.0 h
- Testing8.0 h
- Review / QA4.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $4,928.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2019-9502 — or any other known-vulnerable package — straight from your lock files. Free and open source; it runs locally and uploads nothing.
References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.
Primary sourcesPractitioner notes
ContributedPeer-ranked notes from engineers who’ve handled CVE-2019-9502 in production — separate from our analysis above.
The advisory tells you what broke. It rarely tells you what actually worked. If you’ve dealt with this one, that detail is what the next engineer is searching for.
- The version that genuinely resolved it — not the one the vendor claimed
- A config change or rule that shut the vector down
- A gotcha in the upgrade path that cost you an afternoon
No notes yet
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- 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
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