FedoraOperating system · Fedoraproject
CVE-2019-3833
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 · uneditedOpenwsman, versions up to and including 2.6.9, are vulnerable to infinite loop in process_connection() when parsing specially crafted HTTP requests. A remote, unauthenticated attacker can exploit this vulnerability by sending malicious HTTP request to cause denial of service to openwsman server.
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 confidenceOpenwsman versions up to and including 2.6.9 contain an infinite loop vulnerability in the process_connection() function when parsing specially crafted HTTP requests. A remote, unauthenticated attacker can exploit this by sending malformed HTTP requests to trigger the infinite loop and cause a denial of service.
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
FedoraOperating system
= 28= 29= 30<= 2.6.9= 15.0= 42.3CVSS 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
- None
- Integrity
- None
- Availability
- High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/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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Check if Openwsman is installedOn Fedora/RHEL-based systems: rpm -qa | grep -i openwsman. On SUSE-based systems: rpm -qa | grep -i openwsman or zypper search installed openwsman.Affected if Openwsman package is found on the system
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Determine installed Openwsman versionRun 'rpm -q --queryformat "%{VERSION}-%{RELEASE}" openwsman' on Fedora/RHEL, or 'rpm -q --queryformat "%{VERSION}-%{RELEASE}" openwsman' on SUSE.Affected if Version returned is 2.6.9 or lower, or the command fails to return a version (package not found)
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Check if openwsman service is runningRun 'systemctl status openwsman' (Fedora/SUSE) or check for processes: 'ps aux | grep -i openwsman' or 'pgrep -a openwsmand'.Affected if The openwsman service daemon is actively running
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Verify network exposure of openwsmanCheck if the openwsman listener is bound to a network interface: 'netstat -tlnp | grep -E "(5985|5986|9695)"' or 'ss -tlnp | grep -E "(5985|5986|9695)"' (these are common WS-Man ports). Also verify firewall rules allow traffic on these ports.Affected if Openwsman is listening on a reachable network interface (not localhost-only) and firewall permits access
The system is affected if Openwsman version 2.6.9 or lower is installed AND the service is running and network-accessible, allowing remote attackers to send malformed HTTP requests that trigger the infinite loop.
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 Openwsman to a version beyond 2.6.9 (ideally the latest available version) to obtain the patch that fixes the infinite loop in HTTP request parsing. If immediate patching is not feasible, restrict network access to the openwsman service using firewall rules or network segmentation to limit exposure to unauthenticated attackers.
Fix this in Fedora
Scoped from the published advisory
- Consultation2.0 h
- Implementation2.0 h
- Testing3.0 h
- Review / QA1.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $2,224.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2019-3833 — 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-2019-3833 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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