CVE-2020-37095
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 · uneditedCyberoam Authentication Client 2.1.2.7 contains a buffer overflow vulnerability that allows remote attackers to execute arbitrary code by overwriting Structured Exception Handler (SEH) memory. Attackers can craft a malicious input in the 'Cyberoam Server Address' field to trigger a bind TCP shell on port 1337 with system-level access.
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 confidenceA buffer overflow in Cyberoam Authentication Client 2.1.2.7 allows remote attackers to execute arbitrary code by overflowing the 'Cyberoam Server Address' field and overwriting Structured Exception Handler (SEH) memory, achieving a bind TCP shell on port 1337 with system-level privileges.
Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.
CVSS 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
- High
- Availability
- High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
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 Cyberoam Authentication Client installationCheck for the presence of Cyberoam Authentication Client on the system. Look in Program Files for 'Cyberoam' or 'CRClient' folders, or check the Windows registry under HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall for Cyberoam entries.Affected if The software is installed on the system.
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Identify installed versionLocate the executable (typically CRClient.exe or similar in the Cyberoam installation directory) and right-click to view Properties, or use command 'wmic product where "name like '%Cyberoam%'" get version' to query the installed version.Affected if The installed version is 2.1.2.7.
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Check for active network listeners on port 1337Open Command Prompt and run 'netstat -ano | findstr :1337' to check if any process is listening on the default bind shell port mentioned in the CVE.Affected if Port 1337 is open and listening, indicating potential compromise.
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Verify Cyberoam Server Address configurationLaunch the Cyberoam Authentication Client if installed, navigate to the server configuration or connection settings where the 'Cyberoam Server Address' field is defined, and note whether a server address is configured or could be manipulated.Affected if The client has a configurable server address field and is in use, making it vulnerable to a malformed address input.
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Review application logs for crash or error evidenceCheck Windows Event Viewer under Application logs for any Cyberoam-related crashes, SEH overwrite errors, or unusual application termination events around the time of the vulnerability disclosure.Affected if SEH corruption or buffer overflow errors are logged for the Cyberoam client.
A system is affected if Cyberoam Authentication Client version 2.1.2.7 is installed and the server address configuration feature is accessible or active.
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 dataApply vendor patch or upgrade to patched version; if unavailable, implement input validation/character limits on the server address field and consider network segmentation to limit exposure of the client.
- Consultation4.0 h
- Implementation8.0 h
- Testing6.0 h
- Review / QA4.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2020-37095 — 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-2020-37095 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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