CVE-2020-7953
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 · uneditedAn issue was discovered in OpServices OpMon 9.3.2. Without authentication, it is possible to read server files (e.g., /etc/passwd) due to the use of the nmap -iL (aka input file) option.
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 confidenceOpServices OpMon 9.3.2 contains an unauthenticated file read vulnerability where attackers can exploit the nmap -iL (input file) option to read arbitrary server files such as /etc/passwd. This indicates the application accepts user-controlled input for the nmap target list without proper validation or authentication, allowing path traversal to access sensitive system files.
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= 9.3.2CVSS 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
- Privileges
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- None
- Availability
- None
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/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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Confirm OpMon installation and versionLocate the OpMon installation directory and check version files, or run 'opmon -v' or check the web interface About/Help page for version informationAffected if The installed version is exactly 9.3.2
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Identify nmap integration functionalityLook for nmap-related configuration files, scripts, or web endpoints within the OpMon application that handle network scanning tasksAffected if The nmap feature with -iL (input list) parameter support is present in the installation
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Verify if the nmap input endpoint is accessible without authenticationAttempt to access the nmap-related URL endpoint (typically under /opmon/nmap or similar paths) without providing login credentialsAffected if The endpoint accepts requests without requiring authentication
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Check for path traversal in nmap parametersInspect the nmap configuration or try a test request with a path traversal sequence (e.g., ../../etc/passwd) in the target parameter to see if the application accepts arbitrary file pathsAffected if The application accepts and processes file paths outside the intended directory via the nmap -iL parameter
A system is affected if OpMon version 9.3.2 is installed AND the nmap -iL feature is accessible without authentication, allowing path traversal to read arbitrary files.
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 dataImplement proper authentication for all sensitive endpoints and remove or properly sanitize the nmap -iL functionality to prevent user-controlled file path input. Alternatively, restrict the nmap input to explicitly whitelisted, safe target files within a secured directory.
- Consultation3.0 h
- Implementation6.0 h
- Testing3.0 h
- Review / QA2.0 h
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Free · runs locallyCheck whether your project pulls in CVE-2020-7953 — 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-2020-7953 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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