CVE-2023-23539
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 · uneditedA buffer overflow issue was addressed with improved memory handling. This issue is fixed in macOS Ventura 13.2. Mounting a maliciously crafted Samba network share may lead to arbitrary code execution.
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 confidenceA buffer overflow vulnerability in macOS Ventura's Samba/network share mounting functionality allows arbitrary code execution when a user mounts a maliciously crafted Samba share. The vulnerability stems from improper memory handling during share mount operations.
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>= 13.0, < 13.2CVSS 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
- None
- User interaction
- Required
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- High
- Availability
- High
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/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 macOS versionRun 'sw_vers -productVersion' in Terminal to get the installed macOS versionAffected if The version is 13.0, 13.1, or any 13.x version below 13.2
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Verify Samba share mounting capabilityRun 'mount' or 'ls /mnt' to see if any network shares are currently mounted or accessibleAffected if Samba/CIFS shares can be mounted and the macOS version is below 13.2
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Check for recent mount activityRun 'ls -la /Volumes' to list currently mounted volumes including network sharesAffected if Any Samba network shares are mounted and the macOS version falls within the affected range (13.0 to 13.1)
If macOS Ventura is running version 13.0 or 13.1 and Samba/network shares can be mounted, the environment is potentially affected by this vulnerability.
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 · scoped13.2
Update macOS to version 13.2 or later to patch the vulnerability, and avoid mounting Samba shares from untrusted or unknown sources.
macOS Ventura 13.2
- Back up your Mac using Time Machine or another backup solution before updating
- Open System Settings (or System Preferences on older macOS)
- Navigate to General > Software Update
- Click 'Check for Update' and wait for macOS Ventura 13.2 to appear
- Click 'Download and Install' to download and apply the update
- Follow any on-screen prompts and restart your Mac when installation is complete
- After restarting, verify the update by going to About This Mac (Apple menu > About This Mac) and confirming the version shows 13.2 or later
Generated from the published advisory — verify against the referenced sources before acting.
- Consultation2.0 h
- Implementation4.0 h
- Testing2.0 h
- Review / QA1.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2023-23539 — 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-2023-23539 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
- No spam, self-promotion, credentials, or personal data