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Stack-based Buffer OverflowWeakness · CWE-121

CVE-2024-23934

HIGH · 8.8 CVSS v3.1 Published 2024-09-23
Mitigation only
No fix yet — a mitigation exists. There is no fixed release. A documented workaround reduces exposure in the meantime.
See remediation →
95/100
Remediation priority · Urgent
Remotely reachable No privileges

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
Sony XAV-AX5500 WMV/ASF Parsing Stack-based Buffer Overflow Remote Code Execution Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected installations of Sony XAV-AX5500 devices. User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file. The specific flaw exists within the parsing of WMV/ASF files. A crafted Extended Content Description Object in a WMV media file can trigger an overflow of a fixed-length stack-based buffer. An attacker can leverage this vulnerability to execute code in the context of the device. . Was ZDI-CAN-22994.

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 confidence

A stack-based buffer overflow in Sony XAV-AX5500 head units allows RCE via crafted WMV/ASF files. The vulnerability exists in the Extended Content Description Object parser, where a specially constructed WMV file with an oversized field overflows a fixed-length stack buffer, enabling arbitrary code execution in the device context.

MitigationApply vendor firmware updates when available. Until then, warn users against opening WMV/ASF files from untrusted sources and consider network segmentation to limit exposure of the head unit.

Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.

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
Required
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.1/AV:N/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 checks

Work through these to decide whether this CVE applies to you.

  1. Confirm device model
    Identify if the head unit is a Sony XAV-AX5500 by checking the device label, system information menu, or firmware splash screen during boot.
    Affected if The device is a Sony XAV-AX5500 model, as this is the only model listed as affected by this CVE.
  2. Check firmware version
    Access the head unit settings menu, typically under Settings > System > System Information, or check the Sony support website for your specific firmware version number.
    Affected if The installed firmware version matches or precedes the version that introduced the vulnerability, per Sony's official advisory.
  3. Verify WMV/ASF playback capability
    Check if the head unit media player supports WMV or ASF file formats by attempting to play such a file from USB or verify format support in the playback settings.
    Affected if WMV/ASF media playback is enabled or the device can process WMV/ASF files from USB storage, as the exploit targets the Extended Content Description Object parser in these files.
  4. Inspect connected media for WMV/ASF files
    Examine any USB drives or media sources connected to the head unit for WMV or ASF files, especially from untrusted or unknown sources.
    Affected if Crafted WMV/ASF files with oversized fields are present on media connected to the device, which could trigger the buffer overflow when played.
  5. Review for signs of compromise
    Monitor the head unit for unexpected behavior such as crashes, reboots, or unfamiliar applications after playing media files, or check for unauthorized network connections.
    Affected if The device exhibits abnormal behavior consistent with code execution, such as unexplained crashes following media playback.

A user is affected if they own a Sony XAV-AX5500 head unit with a vulnerable firmware version and have WMV/ASF playback capability enabled, particularly when handling files from untrusted sources.

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 updates when available. Until then, warn users against opening WMV/ASF files from untrusted sources and consider network segmentation to limit exposure of the head unit.

Have this fixed Scoped from the published advisory
  • Consultation8.0 h
  • Implementation16.0 h
  • Testing8.0 h
  • Review / QA4.0 h
36.0 hours of engineering $6,400
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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-2024-23934 in production — separate from our analysis above.

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What this is

A place for practitioners to share what actually worked: a mitigation you’ve tested, a configuration change, a version- or environment-specific caveat, or a link to a verified patch. The most useful notes rise to the top as peers upvote them, so the signal stays high.

What belongs here
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  • Version or environment caveats, and links to real fixes
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