CVE-2008-1691
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 · uneditedUnspecified vulnerability in SLMail.exe in SLMail Pro 6.3.1.0 and earlier allows remote attackers to cause a denial of service (UDP service outage) via a large packet to UDP port 54. NOTE: some of these details are obtained from third party information.
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 confidenceDenial of service vulnerability in SLMail Pro email server (versions 6.3.1.0 and earlier). The SLMail.exe component fails to properly handle large UDP packets sent to port 54, causing the UDP service to become unavailable. Attack is remotely exploitable without authentication.
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<= 6.3.1.0CVSS 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
- Low
- Authentication
- None
- Confidentiality
- None
- Integrity
- None
- Availability
- Partial
AV:N/AC:L/Au:N/C:N/I:N/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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Locate SLMail Pro installation directoryCheck common installation paths such as C:\Program Files\SLMail or C:\SLMail, or use the Windows Add/Remove Programs feature to identify SLMail Pro installation.Affected if SLMail Pro is installed on the system
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Determine installed SLMail Pro versionOpen the SLMail.exe file properties (right-click SLMail.exe in the installation directory, select Properties, then click the Version tab) to view the File Version. Alternatively, check the version listed in Add/Remove Programs.Affected if The reported version is 6.3.1.0 or any version lower than 6.3.1.0
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Verify UDP port 54 is listeningOpen Command Prompt and run 'netstat -an | findstr :54' or use 'netstat -p UDP -a' to list all UDP ports. Look for 0.0.0.0:54 or :::54 in the listening state.Affected if UDP port 54 is shown as LISTENING or the service is bound to port 54
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Confirm SLMail service is runningOpen Services.msc and look for a service named 'SLMail' or check Task Manager for the SLMail.exe process actively running.Affected if The SLMail service or SLMail.exe process is currently running
A user is affected if SLMail Pro version 6.3.1.0 or earlier is installed, the application is running, and UDP port 54 is exposed and listening on the system.
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 dataFilter or block external traffic to UDP port 54 at the network perimeter; if a patched version is available from the vendor, upgrade SLMail Pro. Consider migrating to a currently-supported email server solution.
- Consultation1.0 h
- Implementation2.0 h
- Testing2.0 h
- Review / QA1.0 h
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Free · runs locallyCheck whether your project pulls in CVE-2008-1691 — 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-2008-1691 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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