CVE-2007-4242
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 pop3 Proxy in Astaro Security Gateway (ASG) 7 does not perform virus scanning of attachments that exceed the maximum attachment size, and passes these attachments, which allows remote attackers to bypass this scanning via a large attachment.
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 confidenceThe POP3 proxy in Astaro Security Gateway v7 fails to virus-scan attachments exceeding the configured maximum attachment size limit, allowing malicious files to pass through unmodified. This is a bypass vulnerability where oversized attachments completely circumvent the gateway's anti-virus scanning engine.
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= 7.0CVSS 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
- Partial
- Availability
- None
AV:N/AC:L/Au:N/C:N/I:P/A:N
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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Verify Astaro Security Gateway versionCheck the installed product version through the ASG web interface under System > Status or use the command line 'uptime' or 'cat /etc/asg_version' to confirm the exact version numberAffected if The installed version is exactly 7.0 (other versions are not affected)
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Confirm POP3 proxy is enabledLog into the ASG web interface and navigate to Mail > POP3 Proxy. Verify that the POP3 proxy service is turned on and actively processing mailAffected if The POP3 proxy is enabled and processing traffic (if disabled, the vulnerability does not apply)
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Check maximum attachment size settingIn the POP3 proxy configuration, locate the setting for 'Maximum attachment size' or similar option that defines the size limit for attachments to be scannedAffected if A maximum attachment size limit is configured (the vulnerability applies when attachments exceed this limit)
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Inspect bypass rules or exclusionsReview the POP3 proxy policy rules and any configured exceptions or bypass lists to see if large attachments are explicitly excluded from scanningAffected if Large attachments are excluded from AV scanning or there is a size threshold that causes oversized files to bypass the scanner entirely
You are affected if you are running Astaro Security Gateway v7.0 with the POP3 proxy enabled and a configured maximum attachment size limit, allowing oversized attachments to bypass virus scanning.
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 dataSince ASG v7 is likely end-of-life with no patch available, implement compensating controls such as configuring an upstream/downstream mail server to scan oversized attachments, deploying endpoint anti-virus, or implementing a separate email security gateway with proper large-file handling. Consider upgrading to a supported Astaro/UTM solution if available.
- Consultation2.0 h
- Implementation3.0 h
- Testing2.0 h
- Review / QA1.0 h
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Free · runs locallyCheck whether your project pulls in CVE-2007-4242 — 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-2007-4242 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
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