dbcve.org
Kiwi Syslog ServerApplication · Solarwinds

CVE-2021-35235

MEDIUM · 5.3 CVSS v3.1 Published 2021-10-27
Fix available
A fix is available. Upgrade to after 9.7.2 or later.
See remediation →
62/100
Remediation priority · Elevated
Remotely reachable No privileges Zero-click

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 · unedited
The ASP.NET debug feature is enabled by default in Kiwi Syslog Server 9.7.2 and previous versions. ASP.NET allows remote debugging of web applications, if configured to do so. Debug mode causes ASP.NET to compile applications with extra information. The information enables a debugger to closely monitor and control the execution of an application. If an attacker could successfully start a remote debugging session, this is likely to disclose sensitive information about the web application and supporting infrastructure that may be valuable in targeting SWI with malicious intent.

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 · moderate confidence

The ASP.NET debug feature is enabled by default in Kiwi Syslog Server 9.7.2 and prior versions. Debug mode causes ASP.NET to compile applications with extra debugging information that enables a debugger to closely monitor and control application execution, potentially exposing sensitive information about the web application and supporting infrastructure.

MitigationDisable ASP.NET debug mode in the Kiwi Syslog Server configuration or web.config file to prevent remote debugging sessions and the associated information disclosure.

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
Kiwi Syslog ServerApplication
Affected:<= 9.7.2

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
Low
Integrity
None
Availability
None

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/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 checks

Work through these to decide whether this CVE applies to you.

  1. Identify installed Kiwi Syslog Server version
    Open the Kiwi Syslog Server GUI, then go to Help > About, or check the version displayed in the application title bar. Alternatively, check the Windows Programs and Features list.
    Affected if The installed version is 9.7.2 or any earlier version (e.g., 9.7.1, 9.7.0, etc.)
  2. Locate the Kiwi Syslog Server web.config file
    Navigate to the Kiwi Syslog Server installation directory (typically C:\Program Files\SolarWinds\Kiwi Syslog Server or C:\Program Files (x86)\SolarWinds\Kiwi Syslog Server) and locate the web.config file.
    Affected if The web.config file exists in the installation directory
  3. Check for ASP.NET debug compilation setting
    Open the web.config file in a text editor and search for the <compilation> element within <system.web>. Inspect whether the debug attribute is set to true (debug="true").
    Affected if The compilation element contains debug="true"
  4. Check for ASP.NET debug page setting
    In the same web.config file, search for the <pages> element within <system.web>. Inspect whether the debug attribute is set to true (debug="true").
    Affected if The pages element contains debug="true"
  5. Verify debug mode is enabled by default in affected versions
    Confirm the installation is on a version <= 9.7.2 with debug settings present in web.config
    Affected if The version is <= 9.7.2 AND debug mode is enabled in web.config (debug="true" in compilation or pages elements)

You are affected if you are running Kiwi Syslog Server version 9.7.2 or earlier AND the web.config file contains debug="true" in the compilation or pages element.

Generated from the published advisory. Verify against your own configuration.

Check your environment

Paste your version and any relevant configuration and it will be compared against the affected criteria above. Do not include secrets or credentials.

AI-assisted, checked against the advisory. Informational, not a guarantee.

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 data
Upgrade available Upgrade to a release after 9.7.2
Interim mitigation

Disable ASP.NET debug mode in the Kiwi Syslog Server configuration or web.config file to prevent remote debugging sessions and the associated information disclosure.

Fix this in Kiwi Syslog Server Scoped from the published advisory
  • Consultation2.0 h
  • Implementation2.0 h
  • Testing2.0 h
  • Review / QA1.0 h
7.0 hours of engineering $1,240
Get the upgrade done

An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $1,984.

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References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.

Primary sources

Practitioner notes

Contributed

Peer-ranked notes from engineers who’ve handled CVE-2021-35235 in production — separate from our analysis above.

No notes yet

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What this is

A place for practitioners to share what actually worked: a mitigation you’ve tested, a configuration change, a version- or environment-specific caveat, or a link to a verified patch. The most useful notes rise to the top as peers upvote them, so the signal stays high.

What belongs here
  • 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