CVE-2001-1140
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 · uneditedBadBlue Personal Edition v1.02 beta allows remote attackers to read source code for executable programs by appending a %00 (null byte) to the request.
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 confidenceBadBlue Personal Edition v1.02 beta is vulnerable to a null byte injection flaw that allows remote attackers to read the source code of executable programs by appending %00 to requests. This enables attackers to view server-side code that should not be publicly accessible.
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= 1.02_betaCVSS 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
- None
- Availability
- None
AV:N/AC:L/Au:N/C:P/I:N/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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Identify if BadBlue is installedCheck for BadBlue executable or service: look for 'badblue.exe' in Program Files or running processes, or check for service named 'BadBlue'Affected if BadBlue Personal Edition is present on the system
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Verify the exact version numberRight-click badblue.exe, select Properties, and check the Version tab for the exact build number, or query the running service for its versionAffected if Version is 1.02_beta (exact match)
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Confirm the web server is accessibleAttempt to access the BadBlue web interface via HTTP on the configured port (default 80)Affected if The web interface is reachable without authentication
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Test for null byte injection vulnerabilitySend a GET request to the server appending '%00' to a known executable path (e.g., http://target/cgi-bin/script.exe%00) and check if source code is returned instead of executionAffected if The server returns source code content when %00 is appended to executable requests
If BadBlue Personal Edition version 1.02_beta is running and its web interface responds to requests with null byte injection (%00) by exposing source code, the system is affected by CVE-2001-1140.
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 this is a legacy application from 2001 with likely no available patch, organizations should upgrade to a supported web server solution or implement a WAF to filter null byte sequences from incoming requests.
- Consultation2.0 h
- Implementation4.0 h
- Testing2.0 h
- Review / QA1.0 h
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Free · runs locallyCheck whether your project pulls in CVE-2001-1140 — 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-2001-1140 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
- No spam, self-promotion, credentials, or personal data