CVE-2023-20700
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 widevine, there is a possible out of bounds write due to a logic error. This could lead to local escalation of privilege with System execution privileges needed. User interaction is not needed for exploitation. Patch ID: ALPS07643304; Issue ID: ALPS07643304.
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 confidenceIn Widevine (Google's DRM component), there is an out-of-bounds write vulnerability caused by a logic error. An attacker with existing System-level execution privileges could exploit this to escalate privileges locally. The issue affects MediaTek-based Android devices as indicated by the ALPS patch identifier.
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= 11.0= 12.0CVSS 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
- High
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- High
- Availability
- High
CVSS:3.1/AV:L/AC:L/PR:H/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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Check Android versionRun 'getprop ro.build.version.release' in a shell or check Settings > About Phone > Android versionAffected if The version is exactly 11.0 or 12.0
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Verify MediaTek chipsetRun 'getprop ro.mediatek.platform' in a shell or check 'cat /proc/cpuinfo' for MediaTek processor identifierAffected if The device uses a MediaTek SoC (System-on-Chip)
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Confirm Widevine DRM is presentCheck for widevine support via 'drm manager' or inspect DRM configuration in Settings > Security > DRM info or Widevine CDM statusAffected if Widevine DRM component is present and enabled on the device
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Check for ALPS patch statusRun 'getprop ro.build.version.alps' or 'getprop ro.mediatek.version.release' to see if the vendor patch ALPS07643304 is appliedAffected if The ALPS patch identifier ALPS07643304 is NOT listed in the system properties
The device is affected if it runs Android 11.0 or 12.0 on a MediaTek chipset, has Widevine DRM enabled, and the ALPS07643304 patch has not been applied by the vendor.
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.
dbcve · scopedApply the vendor patch ALPS07643304 to the Widevine component on affected MediaTek devices. This is a vendor-supplied patch that must be obtained through the device manufacturer's security update channel.
- 1. Check your device manufacturer's Android Security Bulletin for the month containing the fix for ALPS07643304
- 2. Verify your current Android patch level in Settings > About Phone > Security Patch Level
- 3. Contact your device OEM (Original Equipment Manufacturer) to confirm if a security update containing MediaTek patch ALPS07643304 is available for your specific device model
- 4. Apply the available security update from your device manufacturer
Generated from the published advisory — verify against the referenced sources before acting.
- Consultation2.0 h
- Implementation4.0 h
- Testing6.0 h
- Review / QA2.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $3,808.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2023-20700 — 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-2023-20700 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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