CVE-2009-4838
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 · uneditedSQL injection vulnerability in base_ag_common.php in Basic Analysis and Security Engine (BASE) before 1.4.3.1 allows remote attackers to execute arbitrary SQL commands via unspecified parameters. 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 confidenceSQL injection vulnerability in base_ag_common.php in the Basic Analysis and Security Engine (BASE) allows remote attackers to execute arbitrary SQL commands via unspecified parameters. This is a classic SQL injection flaw where user-supplied input is not properly sanitized or parameterized before being used in database queries.
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<= 1.4.3= 1.1= 1.1.2= 1.1.3= 1.1.4= 1.2= 1.2.0= 1.2.1= 1.2.2= 1.2.4= 1.2.5= 1.2.6CVSS 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 if BASE is installedLook for the Basic Analysis and Security Engine (BASE) application in your web server directories. Common paths include /var/www/html/base, /var/www/base, or C:\inetpub\wwwroot\base. Check for the presence of base_ag_common.php in the base directory.Affected if BASE is installed on the system
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Determine the installed BASE versionLocate the version file or check the main BASE page (typically index.php) for the version number. The version is often displayed in the footer of the BASE web interface or can be found in a VERSION file within the BASE directory.Affected if The installed version matches one of the affected versions: <= 1.4.3, or specifically 1.1, 1.1.2, 1.1.3, 1.1.4, 1.2, 1.2.0, 1.2.1, 1.2.2, 1.2.4, 1.2.5, or 1.2.6
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Verify the vulnerable file existsConfirm that base_ag_common.php exists in the BASE installation directory under the includes or scripts subdirectory.Affected if The file base_ag_common.php is present in the installation
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Check if the PHP SQL injection sink is presentExamine base_ag_common.php for dynamic SQL query construction using variables directly in SQL statements without proper escaping or parameterized queries. Look for patterns like '$var' being concatenated directly into SQL queries.Affected if The code contains unsanitized user input being used directly in SQL queries without prepared statements or input validation
You are affected if BASE is installed with a version <= 1.4.3 and the vulnerable base_ag_common.php file contains unsanitized SQL query construction.
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 dataUpgrade to BASE version 1.4.3.1 or later which contains the fix. Alternatively, implement proper input validation and use parameterized queries (prepared statements) in base_ag_common.php to neutralize SQL injection vectors.
- Consultation4.0 h
- Implementation8.0 h
- Testing4.0 h
- Review / QA2.0 h
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Free · runs locallyCheck whether your project pulls in CVE-2009-4838 — 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-2009-4838 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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