CVE-2024-21778
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 heap-based buffer overflow vulnerability exists in the configuration file mib_init_value_array functionality of Realtek rtl819x Jungle SDK v3.4.11. A specially crafted .dat file can lead to arbitrary code execution. An attacker can upload a malicious file to trigger this vulnerability.
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 confidenceA heap-based buffer overflow vulnerability exists in the mib_init_value_array function of Realtek rtl819x Jungle SDK v3.4.11 during configuration file parsing. By uploading a specially crafted .dat file, an attacker can corrupt heap memory and achieve arbitrary code execution.
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= 3.4.11= rer4_a_v3411b_2t2r_lev_09_170623CVSS 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
- High
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- High
- Availability
- High
CVSS:3.1/AV:N/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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Identify the firmware or SDK versionCheck the device firmware version or identify the RTL819x Jungle SDK version in use. For Level1 WBR 6013, look for version rer4_a_v3411b_2t2r_lev_09_170623. For SDK usage, check for version 3.4.11 in firmware strings or SDK documentation.Affected if The firmware version is exactly 3.4.11 (SDK) or rer4_a_v3411b_2t2r_lev_09_170623 (Level1 WBR 6013)
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Confirm the device uses Realtek rtl819x Jungle SDKIdentify if the target system or firmware is based on the Realtek rtl819x Jungle SDK. Search firmware binaries or system information for strings indicating RTL819x or Jungle SDK.Affected if The system firmware or software explicitly uses the Realtek rtl819x Jungle SDK
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Verify .dat configuration file handling is enabledCheck if the system has functionality to upload, parse, or process .dat configuration files. This may be accessible via web interface, CLI, or API endpoints that accept configuration file imports.Affected if .dat configuration file upload or import functionality is present and accessible
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Locate the mib_init_value_array functionIf access to firmware binaries is available, search for the mib_init_value_array function symbol in the firmware image or associated libraries to confirm the vulnerable code path exists.Affected if The mib_init_value_array function is present in the firmware binary
A system is affected if it runs Realtek rtl819x Jungle SDK v3.4.11 or Level1 WBR 6013 firmware rer4_a_v3411b_2t2r_lev_09_170623 and has the ability to process .dat configuration files through the mib_init_value_array function.
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 from Realtek for the rtl819x Jungle SDK. Until patched, restrict or validate .dat configuration file uploads to prevent malicious files from being processed by the affected mib_init_value_array function.
- Consultation8.0 h
- Implementation24.0 h
- Testing16.0 h
- Review / QA8.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2024-21778 — 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-2024-21778 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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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.
- 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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