CVE-2023-28125
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 improper authentication vulnerability exists in Avalanche Premise versions 6.3.x and below that could allow an attacker to gain access to the server by registering to receive messages from the server and perform an authentication bypass.
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 confidenceAvalanche Premise versions 6.3.x and below contain an improper authentication vulnerability where attackers can register to receive messages from the server, bypassing normal authentication controls and gaining unauthorized access to the server.
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<= 6.3.4.153CVSS 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
- High
- Privileges
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- None
- Availability
- None
CVSS:3.1/AV:N/AC:H/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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Determine installed Ivanti Avalanche versionAccess the Avalanche administration console or check the product About/Version information page. Alternatively, inspect the Avalanche server installation directory for version manifest files or check the installed software list on the server system.Affected if The installed version is 6.3.4.153 or any version lower than 6.3.4.153 (e.g., 6.3.3, 6.3.2, etc.)
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Identify message registration endpoint accessibilityReview Avalanche server configuration files or web service settings to locate the message registration endpoint. Check if this endpoint is exposed on network-accessible interfaces without authentication requirements.Affected if The message registration endpoint is accessible without requiring valid authentication credentials
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Audit existing message subscriptionsQuery the Avalanche server message queue or subscription database to list all registered message recipients. Look for subscriptions that were created without corresponding valid user accounts or authentication records.Affected if There are message subscriptions present that do not correspond to legitimate authenticated users or authorized system accounts
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Review authentication configuration for messaging servicesExamine the Avalanche server authentication configuration files or settings that govern the message registration and subscription services. Determine if authentication is enforced or bypassed for these specific endpoints.Affected if Authentication is disabled or not enforced for the message registration functionality
The environment is affected if the installed Ivanti Avalanche version is 6.3.4.153 or lower AND the message registration endpoint is accessible without authentication, as this allows unauthorized attackers to subscribe to server messages.
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 Avalanche Premise to a version above 6.3.x. If upgrades are not immediately possible, implement additional authentication controls on message registration endpoints and monitor for unauthorized message subscriptions.
- Consultation4.0 h
- Implementation4.0 h
- Testing4.0 h
- Review / QA2.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2023-28125 — 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-2023-28125 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
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