CVE-2013-3843
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 · uneditedStack-based buffer overflow in the mk_request_header_process function in mk_request.c in Monkey HTTP Daemon (monkeyd) before 1.2.1 allows remote attackers to cause a denial of service (crash) and possibly execute arbitrary code via a crafted HTTP header.
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 confidenceStack-based buffer overflow in the mk_request_header_process function in mk_request.c in Monkey HTTP Daemon before version 1.2.1 allows remote attackers to send crafted HTTP headers, causing denial of service (crash) and potentially 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<= 1.2.0CVSS 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
- M
- Authentication
- None
- Confidentiality
- Partial
- Integrity
- Partial
- Availability
- Partial
AV:N/AC:M/Au:N/C:P/I:P/A:P
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 Monkey HTTP Daemon versionRun 'monkey -V' or 'monkey --version' to display the installed version, or check the package manager output for monkey-http package versionAffected if Version is 1.2.0 or lower (any version <= 1.2.0)
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Locate mk_request.c source fileSearch for mk_request.c in the installation directory: 'find / -name mk_request.c 2>/dev/null' or check the source code if compiled from sourceAffected if The vulnerable mk_request.c file exists in the installation (the function mk_request_header_process is present)
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Verify HTTP processing is enabledCheck the Monkey configuration file (typically monkey.conf) and confirm the HTTP plugin/module is loaded and activeAffected if HTTP handling is enabled - the vulnerability only triggers when processing incoming HTTP requests
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Check for remote exposureReview network configuration to confirm Monkey HTTP Daemon is listening on accessible network interfaces (check bind address in config)Affected if The daemon accepts remote HTTP connections - the flaw is triggerable via crafted HTTP headers sent by remote attackers
A user is affected if Monkey HTTP Daemon version is 1.2.0 or lower AND HTTP processing is enabled and exposed to network traffic.
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 dataUpgrade Monkey HTTP Daemon to version 1.2.1 or later to patch the buffer overflow vulnerability in the HTTP header processing function.
- Consultation1.0 h
- Implementation1.0 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-2013-3843 — 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-2013-3843 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
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