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CVE-2019-3833: Openwsman, versions up to and including 2.6.9, are vulnerable to infinite loop in process_connection() when pa

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This week
HIGH 7.5REMOTEUPGRADEMITIGATEMITIGATE

CVE-2019-3833 is a high-severity flaw (CVSS 7.5) affecting openwsman, fedora, leap. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Openwsman, 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.

Why this priority

  • High severity
  • EPSS top 3%: very likely to be exploited
  • Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score7.5 (High)
Attack vectorNetwork (remote)
Attack complexityLow
Privileges neededNone
User interactionNone
EPSS exploit chance15.2% (top 3%)
CISA exploited listNo
WeaknessCWE-835
Published2019-03-14
Last modified2026-06-17
Publisher (CNA): Red Hat, Inc. · Vendor: fedoraproject · opensuse · openwsman project

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Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

openwsman project openwsman UPGRADE
Affected: <= 2.6.9
Fixed in: newer than 2.6.9
Safe to downgrade to: no unaffected older release
1. Check installed version
apt-cache policy openwsman || rpm -q openwsman || openwsman --version
2. UPGRADE to newer than 2.6.9 (Debian / Ubuntu)
sudo apt update && sudo apt install --only-upgrade openwsman
2. UPGRADE (RHEL / Amazon Linux / Fedora)
sudo dnf upgrade openwsman
Note
Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.
fedoraproject fedora MITIGATE
Affected: 28 · 29 · 30
Fixed in: no fixed release known
Safe to downgrade to: a release before 28
Check your OS release
cat /etc/os-release; uname -r
Debian / Ubuntu
sudo apt update && sudo apt full-upgrade
RHEL / Amazon Linux / Fedora
sudo dnf upgrade --refresh
Windows
Install the latest cumulative update from Windows Update
If no patch exists yet
OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.
opensuse leap MITIGATE
Affected: 15.0 · 42.3
Fixed in: no fixed release known
Safe to downgrade to: a release before 15.0
Check your OS release
cat /etc/os-release; uname -r
Debian / Ubuntu
sudo apt update && sudo apt full-upgrade
RHEL / Amazon Linux / Fedora
sudo dnf upgrade --refresh
Windows
Install the latest cumulative update from Windows Update
If no patch exists yet
OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.
Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2019-3833?

openwsman: upgrade to newer than 2.6.9; fedora: mitigate or apply the listed mitigation; leap: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2019-3833 being exploited?

CVE-2019-3833 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2019-3833 affect?

CVE-2019-3833 affects openwsman, fedora, leap. Severity is high (CVSS 7.5). Openwsman, 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

How urgent is CVE-2019-3833?

Priority 55/100. High severity; EPSS top 3%: very likely to be exploited; Remotely exploitable, no login, no user action

Related CVEs

References

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