CVE-2017-11344
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 · uneditedGlobal buffer overflow in networkmap in Asuswrt-Merlin firmware for ASUS devices and ASUS firmware for ASUS RT-AC5300, RT_AC1900P, RT-AC68U, RT-AC68P, RT-AC88U, RT-AC66U, RT-AC66U_B1, RT-AC58U, RT-AC56U, RT-AC55U, RT-AC52U, RT-AC51U, RT-N18U, RT-N66U, RT-N56U, RT-AC3200, RT-AC3100, RT_AC1200GU, RT_AC1200G, RT-AC1200, RT-AC53, RT-N12HP, RT-N12HP_B1, RT-N12D1, RT-N12+, RT_N12+_PRO, RT-N16, and RT-N300 devices allows remote attackers to write shellcode at any address in the heap; this can be used to execute arbitrary code on the router by hosting a crafted device description XML document at a URL specified within a Location header in an SSDP response.
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 confidenceBuffer overflow in the networkmap service of ASUS routers allows remote attackers to write shellcode to arbitrary heap addresses via a crafted SSDP response containing a malicious URL in the Location header pointing to a malicious device description XML, enabling 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<= 3.0.0.4.380.7743<= 3.0.0.4.380.7743<= 3.0.0.4.380.7743<= 3.0.0.4.380.7743<= 3.0.0.4.380.7743<= 3.0.0.4.380.7743<= 3.0.0.4.380.7743<= 3.0.0.4.380.7485CVSS 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:3.0/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.
-
Identify router firmware versionLog into the router web interface and navigate to 'Firmware Version' on the General page, or run `nvram get firmver` via SSH/TelnetAffected if firmware version is 3.0.0.4.380.7743 or lower for AC5300/AC1900P/AC68U/AC68P/AC88U/AC66U/AC66U_B1, or 3.0.0.4.380.7485 or lower for AC58U
-
Verify networkmap service is activeRun `ps | grep networkmap` via SSH/Telnet to see if the networkmap process is runningAffected if the networkmap process is running (this is the vulnerable service)
-
Confirm SSDP/UPnP is enabledLog into the router web interface and check 'USB Application' > 'Media Services and Router' > 'UPnP' status, or run `nvram get upnp_enable` via SSH (value of 1 means enabled)Affected if UPnP/SSDP is enabled (the vulnerability is exploited via crafted SSDP responses)
-
Check for unauthorized network listenersRun `netstat -ulnp | grep 1900` via SSH to verify if the SSDP multicast listener (port 1900) is bound to the networkmap serviceAffected if port 1900 is listening and networkmap is bound to it (indicates the attack surface is exposed)
The router is affected if it runs a vulnerable Asuswrt Merlin firmware version (as listed) AND has the networkmap service active with SSDP/UPnP enabled, exposing the buffer overflow to remote attackers on the local network.
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 firmware updates when available; prior to patching, disable SSDP/UPnP on affected routers and segment router management interfaces from untrusted networks to reduce attack surface.
- Consultation6.0 h
- Implementation10.0 h
- Testing6.0 h
- Review / QA3.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $7,104.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2017-11344 — 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-2017-11344 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