CVE-2007-0955
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 · uneditedThe NTLM_UnPack_Type3 function in MENTLM.dll in MailEnable Professional 2.35 and earlier allows remote attackers to cause a denial of service (application crash) via certain base64-encoded data following an AUTHENTICATE NTLM command to the imap port (143/tcp), which results in an out-of-bounds read.
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 confidenceA remote denial of service vulnerability exists in MailEnable Professional 2.35 and earlier. The NTLM_UnPack_Type3 function in MENTLM.dll performs an out-of-bounds read when processing specially crafted base64-encoded data sent after an AUTHENTICATE NTLM command on the IMAP service (port 143/tcp), causing the application to crash.
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<= 2.35CVSS 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
- Complete
AV:N/AC:L/Au:N/C:N/I:N/A:C
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 MailEnable installation and versionCheck the MailEnable installation directory for version information. Common paths: C:\Program Files\MailEnable\ or inspect Add/Remove Programs in Windows Control Panel for MailEnable Professional version.Affected if Installed version is MailEnable Professional 2.35 or earlier (any version <= 2.35).
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Verify IMAP service is runningCheck if the MailEnable IMAP service is active. Use command 'netstat -an | findstr :143' or check Services.msc for 'MailEnable IMAP Service'.Affected if IMAP service is listening on port 143/tcp, making the vulnerability reachable over the network.
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Confirm NTLM authentication is enabled for IMAPInspect MailEnable configuration. In MailEnable Administrator, go to IMAP server properties > Security/Authentication. Alternatively, check the MENTLM.dll file version in the MailEnable bin directory.Affected if NTLM authentication is enabled for the IMAP service, which is required to trigger the vulnerable code path.
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Check MENTLM.dll file versionLocate MENTLM.dll in the MailEnable bin directory (typically C:\Program Files\MailEnable\bin\). Right-click the file, select Properties, and check the Version tab.Affected if The MENTLM.dll file version corresponds to an unpatched build (versions prior to the CVE-2007-0955 fix). Compare your version to the affected range <= 2.35.
A system is affected if MailEnable Professional version 2.35 or earlier is installed, the IMAP service is running on port 143, and NTLM authentication is enabled for IMAP, allowing remote attackers to trigger the out-of-bounds read in MENTLM.dll.
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 MailEnable Professional to a version newer than 2.35 that includes the patched MENTLM.dll, or apply any available vendor hotfix for CVE-2007-0955. If immediate patching is not feasible, consider restricting or filtering NTLM authentication attempts on IMAP port 143 at the network perimeter.
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- Implementation1.0 h
- Testing2.0 h
- Review / QA1.0 h
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Free · runs locallyCheck whether your project pulls in CVE-2007-0955 — 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-2007-0955 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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