CVE-2010-4840
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 · uneditedMultiple buffer overflows in the Syslog server in ManageEngine EventLog Analyzer 6.1 allow remote attackers to cause a denial of service (SysEvttCol.exe process crash) or possibly execute arbitrary code via a long Syslog PRI message header to UDP port (1) 513 or (2) 514. Fixed in 7.2 Build 7020.
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 vulnerability in the Syslog server component of ManageEngine EventLog Analyzer 6.1 allows remote attackers to send crafted Syslog PRI messages via UDP to ports 513 or 514. The overflow is triggered by an overly long PRI message header, leading to denial of service (SysEvttCol.exe crash) or potential 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= 6.1CVSS 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
- Authentication
- None
- Confidentiality
- Partial
- Integrity
- Partial
- Availability
- Partial
AV:N/AC:L/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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Confirm EventLog Analyzer installationLocate the ManageEngine EventLog Analyzer installation directory, typically under C:\Program Files\ManageEngine\EventLog Analyzer or similar path. Look for the SysEvttCol.exe process in Task Manager.Affected if The product ManageEngine EventLog Analyzer is installed and running
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Verify the installed versionCheck the version of EventLog Analyzer - look for version information in the installation directory, or check the application UI/About section. Common locations include a version.txt file or in the application's main window.Affected if The version is exactly 6.1 (build 6100)
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Confirm Syslog server is enabledCheck if the Syslog server component is active by examining if ports 513 or 514 are listening. Use command: netstat -an | findstr "513\|514" or check the Syslog server settings within the EventLog Analyzer administration console.Affected if UDP ports 513 or 514 are open and listening for Syslog messages
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Assess network exposureVerify the system's network exposure by checking if UDP ports 513/514 are accessible from external or untrusted networks. Use port scanning tools or check firewall rules: netsh advfirewall firewall show rule name=allAffected if The Syslog UDP ports (513/514) are exposed to untrusted network segments
A user is affected if they are running exactly ManageEngine EventLog Analyzer version 6.1 with the Syslog server enabled and UDP ports 513/514 exposed on their 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 dataUpgrade to ManageEngine EventLog Analyzer version 7.2 Build 7020 or later. If immediate patching is not feasible, restrict or filter external UDP traffic to ports 513 and 514 at network boundaries.
- Consultation1.0 h
- Implementation2.0 h
- Testing1.0 h
- Review / QA1.0 h
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Free · runs locallyCheck whether your project pulls in CVE-2010-4840 — 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-2010-4840 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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