CVE-2006-0578
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 · uneditedBlue Coat Proxy Security Gateway OS (SGOS) 4.1.2.1 does not enforce CONNECT rules when using Deep Content Inspection, which allows remote attackers to bypass connection filters.
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 confidenceBlue Coat Proxy SGOS 4.1.2.1 fails to enforce CONNECT method rules when Deep Content Inspection (DCI) is enabled, allowing remote attackers to bypass connection filters by using the HTTP CONNECT method to tunnel traffic through the proxy without proper filtering.
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= 4.1.2.1CVSS 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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Identify the installed SGOS versionAccess the proxy administrative interface or CLI and retrieve the SGOS firmware version. Common methods include the management console (WebUI) or CLI command 'show version' or 'version'Affected if The installed version is exactly 4.1.2.1
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Verify if Deep Content Inspection (DCI) is enabledCheck the proxy configuration for DCI settings. This is typically found in the proxy policy or content filtering section of the Blue Coat management console. Look for DCI-related policy rules or enable statusAffected if DCI is currently enabled on the proxy
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Examine CONNECT method policy rulesReview the proxy policy configuration for explicit CONNECT method filtering rules. Check the policy layer that defines HTTP method restrictions, specifically looking for rules that should filter or restrict the CONNECT methodAffected if No explicit CONNECT method rules exist, or rules exist but are not being enforced
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Test CONNECT tunnel bypassAttempt to establish an HTTP CONNECT tunnel through the proxy to an external host that would normally be blocked. Monitor whether the tunnel is allowed despite connection filter policies being in placeAffected if CONNECT tunnels are allowed through when they should be blocked by existing connection filters
You are affected if running SGOS version 4.1.2.1 with DCI enabled, and CONNECT method tunnels can bypass your connection filtering policies.
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 dataConfigure explicit CONNECT method rules in the proxy policy and ensure DCI properly enforces these rules; consider upgrading to a patched SGOS version if available.
- Consultation4.0 h
- Implementation4.0 h
- Testing3.0 h
- Review / QA2.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2006-0578 — 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-2006-0578 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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- Version or environment caveats, and links to real fixes
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