CVE-1999-0102
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 · uneditedBuffer overflow in SLmail 3.x allows attackers to execute commands using a large FROM line.
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 confidenceBuffer overflow vulnerability in SLmail version 3.x in the handling of the email FROM field allows remote attackers to execute arbitrary commands by submitting an excessively large FROM line that overwrites stack memory and redirects execution flow.
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= 3.0.2421CVSS 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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Check if SLmail is installedLook for SLmail installation directory (typically C:\Program Files\SLmail or C:\SLmail) and check for slmail.exe process in Task Manager or via command: tasklist | findstr -i slmailAffected if SLmail.exe process is running or SLmail directory exists on the system
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Identify SLmail versionRight-click slmail.exe, select Properties, then check the Details tab for File Version, or run: slmail.exe -version from the installation directoryAffected if Version equals 3.0.2421 specifically, or falls within 3.x range
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Verify mail service is accessibleCheck if SLmail POP3 (default port 110) or SMTP (default port 25) ports are listening: run netstat -an | findstr ':25' or ':110' or use Telnet to connect to localhost on these portsAffected if SLmail service ports (25, 110) are open and accepting connections
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Confirm FROM field handling is exposedSLmail processes email FROM field on inbound SMTP connections. Verify SMTP service is enabled in SLmail configuration (check smtp.ini or SLmail configuration GUI)Affected if SMTP service is enabled and accepting external mail connections
System is affected if SLmail version 3.0.2421 (or any 3.x version) is installed with SMTP service enabled and exposed to network connections, as the buffer overflow in FROM field handling can be triggered by submitting an oversized FROM line.
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 dataUpdate SLmail to the latest patched version; if no patch is available (product likely end-of-life), migrate to a supported mail server solution (Postfix, Exchange, Microsoft 365) and implement network segmentation to limit exposure.
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- Implementation4.0 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-1999-0102 — 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-1999-0102 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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