CVE-2023-49595
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 stack-based buffer overflow vulnerability exists in the boa rollback_control_code functionality of Realtek rtl819x Jungle SDK v3.4.11. A specially crafted series of network requests can lead to arbitrary code execution. An attacker can send a sequence of requests 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 stack-based buffer overflow exists in the boa web server's rollback_control_code function within Realtek rtl819x Jungle SDK v3.4.11. The vulnerability is triggered by sending a specially crafted sequence of network requests, allowing an attacker to overwrite stack 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.
-
Identify the device firmware versionCheck the firmware version on the device. For Level1 WBR-6013, this is typically visible in the web interface under System or Status, or via the device's support page.Affected if The firmware version is rer4_a_v3411b_2t2r_lev_09_170623
-
Identify the SDK version if using custom firmwareIf the device uses custom firmware based on Realtek rtl819x Jungle SDK, check the SDK version in the firmware build documentation, release notes, or by examining the firmware image metadata.Affected if The SDK version is exactly 3.4.11
-
Confirm the boa web server is runningCheck if the boa web server process is active on the device. This can be done via SSH/telnet by running 'ps' or checking /proc for running processes, or by attempting to access the web interface on port 80 or 443.Affected if The boa web server process is running and accessible on the network
-
Verify rollback_control_code function existsIf you have access to the firmware image or binary, examine the boa binary for the rollback_control_code function using tools like binwalk, strings, or a disassembler.Affected if The rollback_control_code function is present in the boa binary
-
Check network exposure of management interfaceDetermine if the boa management interface is exposed to untrusted networks. Check router/firewall rules to see if port 80/443 is accessible from WAN or untrusted VLANs.Affected if The boa management interface is accessible from untrusted network segments
A user is affected if their device runs Level1 WBR-6013 firmware rer4_a_v3411b_2t2r_lev_09_170623 or Realtek rtl819x Jungle SDK version 3.4.11, and the boa web server with the vulnerable rollback_control_code function is running and network-accessible.
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-supplied patches when available; alternatively, implement proper bounds checking and input validation in the rollback_control_code function, and restrict network access to the boa management interface.
- Consultation6.0 h
- Implementation12.0 h
- Testing8.0 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 $8,448.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2023-49595 — 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-2023-49595 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
Be the first to add a field note for this CVE — a mitigation you’ve verified, a version caveat, or a link to a working fix. Sign in above to contribute.
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
- No spam, self-promotion, credentials, or personal data