CVE-2023-32831
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 · uneditedIn wlan driver, there is a possible PIN crack due to use of insufficiently random values. This could lead to local information disclosure with no execution privileges needed. User interaction is not needed for exploitation. Patch ID: WCNCR00325055; Issue ID: MSV-868.
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 confidenceThe WLAN driver uses insufficiently random values (weak PRNG) in its PIN generation or authentication handling, allowing an attacker to crack the PIN via brute-force or statistical analysis. This leads to local information disclosure without requiring code execution or user interaction.
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<= 7.6.7.1CVSS 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
- Local
- Complexity
- Low
- Privileges
- Low
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- None
- Availability
- None
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
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 Mediatek SDK installationSearch for Mediatek SDK components or headers on the system. Common paths may include /opt/mediatek, /usr/share/mediatek, or check package manager listings for mediatek packages.Affected if The Mediatek Software Development Kit is installed on the system
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Determine SDK versionLocate the SDK version file or metadata. Check for version files named VERSION, version.h, or examine package manifests. Run: find / -name '*mediatek*' -o -name '*wcn*' 2>/dev/null to locate SDK components, then read version information from identified paths.Affected if The installed version is <= 7.6.7.1 (verify exact version against the <= 7.6.7.1 range)
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Verify WLAN driver presenceCheck if the Mediatek WLAN driver module is loaded or present. Run lsmod | grep -i wcn or check /lib/modules for mediatek wireless driver files. Also check dmesg for wlan driver initialization messages.Affected if The Mediatek WLAN driver (wcn driver) is loaded or installed on the system
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Confirm PIN-based authentication is configuredCheck WLAN configuration files or settings for WPS (Wi-Fi Protected Setup) PIN mode. Look for wps_pin_mode, pin_auth, or similar configuration entries in wireless config files under /etc/wireless, /etc/wpa_supplicant, or NetworkManager configs.Affected if WPS PIN authentication or PIN-based WLAN authentication is enabled or configured on any wireless interface
The system is affected if Mediatek SDK version <= 7.6.7.1 is installed with the WLAN driver loaded and WPS PIN-based authentication is in use.
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 patch WCNCR00325055 to update the WLAN driver with cryptographically secure random number generation for PIN handling. Verify the fix ensures proper randomness in all authentication-related operations.
- Consultation4.0 h
- Implementation8.0 h
- Testing6.0 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 $6,176.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2023-32831 — 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-2023-32831 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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