OpenvpnApplication
CVE-2024-5594
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 · uneditedOpenVPN before 2.6.11 does not santize PUSH_REPLY messages properly which an attacker controlling the server can use to inject unexpected arbitrary data ending up in client logs.
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 confidenceOpenVPN client before version 2.6.11 fails to sanitize data received in PUSH_REPLY messages from the server before logging. An attacker who controls the VPN server can inject arbitrary data (potentially including log injection attacks, ANSI escape codes, or malicious content) into the client's log files, leading to log corruption, potential command injection if logs are processed by other systems, or denial of service through log flooding.
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
OpenvpnApplication
>= 2.6.0, < 2.6.11CVSS 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
- None
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/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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Check installed OpenVPN versionRun `openvpn --version` or check via package manager (dpkg -l openvpn, rpm -qi openvpn)Affected if Version is 2.6.0 through 2.6.10 (versions before 2.6.11)
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Confirm client role receives PUSH_REPLYInspect client configuration file for 'pull' directive or remote server directive indicating this is a client connecting to a serverAffected if Configuration contains 'pull' directive - client receives PUSH_REPLY messages from server
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Examine log files for unsanitized contentReview OpenVPN client log files (typically /var/log/openvpn.log or /var/log/messages) for unexpected data that may have been injected into PUSH_REPLY messagesAffected if Logs contain suspicious or arbitrary data that was not intentionally configured (potential log injection evidence)
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Verify server trust modelDetermine if the VPN server you connect to is controlled by a trusted entityAffected if Connecting to an untrusted or compromised VPN server that could inject malicious PUSH_REPLY payloads
You are affected if OpenVPN client version is 2.6.0-2.6.10 and connects to a server (configured with pull directive), especially untrusted servers.
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.
dbcve · scoped2.6.11
Upgrade OpenVPN clients to version 2.6.11 or later. Until upgrade is possible, implement log parsing safeguards and avoid processing client logs with automated tools that might interpret injected content.
OpenVPN 2.6.11 or later
- Check the current OpenVPN version installed (e.g., openvpn --version)
- Obtain OpenVPN version 2.6.11 or later from your Linux distribution package repository or the official OpenVPN website
- Test the upgrade in a non-production environment to verify compatibility
- Apply the upgrade using your system's package manager (e.g., apt-get update && apt-get install openvpn, yum update openvpn, or dnf update openvpn)
- Restart the OpenVPN service after upgrade
- Verify the installed version is 2.6.11 or later
Generated from the published advisory — verify against the referenced sources before acting.
Fix this in Openvpn
Scoped from the published advisory
- Consultation2.0 h
- Implementation4.0 h
- Testing6.0 h
- Review / QA2.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $3,808.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2024-5594 — 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-2024-5594 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