CVE-2004-1727: BadBlue 2.5 allows remote attackers to cause a denial of service (refuse HTTP connections) via a large number

This month

MEDIUM 5.0DOWNGRADE

CVE-2004-1727 is a medium-severity flaw (CVSS 5.0) affecting badblue. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

BadBlue 2.5 allows remote attackers to cause a denial of service (refuse HTTP connections) via a large number of connections from the same IP address.

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	3.1% (top 12%)
CISA exploited list	No
Published	2004-08-20
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: working resources inc.

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

Am I affected?

Timeline

2004-08-20 04:00 UTCPublished CVE record published
2026-06-16 22:08 UTCUpdated Record last modified

working resources inc. badblue DOWNGRADE

Affected: 2.50

Fixed in: no fixed release known

Safe to downgrade to: a release before 2.50

1. Check installed version

apt-cache policy badblue || rpm -q badblue || badblue --version

2. No fixed release: DOWNGRADE to a release before 2.50 (Debian / Ubuntu)

apt-cache madison badblue sudo apt install badblue=<VERSION_BEFORE_2.50> sudo apt-mark hold badblue

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

dnf --showduplicates list badblue sudo dnf downgrade badblue-<VERSION_BEFORE_2.50> sudo dnf versionlock add badblue

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.

Public exploits and detection

Public code exists for this CVE. Treat unpatched systems as at risk, and only run PoCs in a lab.

Exploit-DB: BadBlue 2.52 Web Server - Multiple Connections Denial of Service Vulnerabilities

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-2004-1727?

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

Is CVE-2004-1727 being exploited?

CVE-2004-1727 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-2004-1727 affect?

CVE-2004-1727 affects badblue. Severity is medium (CVSS 5.0). BadBlue 2.5 allows remote attackers to cause a denial of service (refuse HTTP connections) via a large number of connections from the same IP address.

How urgent is CVE-2004-1727?

Priority 44/100. Public exploit reference

Related CVEs

CVE-2008-2003 HIGH 7.5 DOWNGRADE BadBlue 2.72 Personal Edition stores multiple programs in the web document root with insufficient access contr
CVE-2007-6379 MEDIUM 5.0 UPGRADE BadBlue 2.72b and earlier allows remote attackers to obtain sensitive information via an invalid browse parame
CVE-2007-6378 HIGH 7.5 UPGRADE Directory traversal vulnerability in upload.dll in BadBlue 2.72b and earlier allows remote attackers to create
CVE-2007-6377 HIGH 7.5 UPGRADE Stack-based buffer overflow in the PassThru functionality in ext.dll in BadBlue 2.72b and earlier allows remot
CVE-2005-0595 HIGH 7.5 DOWNGRADE Buffer overflow in ext.dll in BadBlue 2.55 allows remote attackers to execute arbitrary code via a long mfcisa

References

← Back to latest CVEs