CVE-2004-2327: Vizer Web Server 1.9.1 allows remote attackers to cause a denial of service (crash) via multiple malformed req

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MEDIUM 5.0DOWNGRADE

CVE-2004-2327 is a medium-severity flaw (CVSS 5.0) affecting vizer web server. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Vizer Web Server 1.9.1 allows remote attackers to cause a denial of service (crash) via multiple malformed requests including (1) requests without GET, (2) GET requests without HTTP, (3) or long GET requests.

Why this priority

Public exploit reference

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	5.0 (Medium)
EPSS exploit chance	1.7% (top 23%)
CISA exploited list	No
Published	2004-12-31
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: vizer web server

Last updated 2026-06-16 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2004-12-31 05:00 UTCPublished CVE record published
2026-06-16 22:09 UTCUpdated Record last modified

vizer web server vizer web server DOWNGRADE

Affected: 1.9.1

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.9.1

1. Check installed version

apt-cache policy vizer-web-server || rpm -q vizer-web-server || vizer-web-server --version

2. No fixed release: DOWNGRADE to a release before 1.9.1 (Debian / Ubuntu)

apt-cache madison vizer-web-server sudo apt install vizer-web-server=<VERSION_BEFORE_1.9.1> sudo apt-mark hold vizer-web-server

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list vizer-web-server sudo dnf downgrade vizer-web-server-<VERSION_BEFORE_1.9.1> sudo dnf versionlock add vizer-web-server

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

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-2004-2327?

vizer web server: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2004-2327 being exploited?

CVE-2004-2327 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-2004-2327 affect?

CVE-2004-2327 affects vizer web server. Severity is medium (CVSS 5.0). Vizer Web Server 1.9.1 allows remote attackers to cause a denial of service (crash) via multiple malformed requests including (1) requests without GET, (2) GET requests without HTTP, (3) or long GET requests.

How urgent is CVE-2004-2327?

Priority 42/100. Public exploit reference

References

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