CVE-2003-1475: Netbus 1.5 through 1.7 allows more than one client to be connected at the same time, but only prompts the firs

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MEDIUM 6.8DOWNGRADE

CVE-2003-1475 is a medium-severity flaw (CVSS 6.8) affecting netbus. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Netbus 1.5 through 1.7 allows more than one client to be connected at the same time, but only prompts the first connection for authentication, which allows remote attackers to gain access.

Why this priority

Public exploit reference

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

Risk facts

CVSS score	6.8 (Medium)
EPSS exploit chance	1.4% (top 28%)
CISA exploited list	No
Weakness	CWE-287
Published	2003-12-31
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: netbus

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

Am I affected?

Timeline

2003-12-31 05:00 UTCPublished CVE record published
2026-06-16 22:04 UTCUpdated Record last modified

netbus netbus DOWNGRADE

Affected: 1.5 · 1.6 · 1.7

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.5

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 1.5 (Debian / Ubuntu)

apt-cache madison netbus sudo apt install netbus=<VERSION_BEFORE_1.5> sudo apt-mark hold netbus

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

dnf --showduplicates list netbus sudo dnf downgrade netbus-<VERSION_BEFORE_1.5> sudo dnf versionlock add netbus

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-2003-1475?

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

Is CVE-2003-1475 being exploited?

CVE-2003-1475 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-2003-1475 affect?

CVE-2003-1475 affects netbus. Severity is medium (CVSS 6.8). Netbus 1.5 through 1.7 allows more than one client to be connected at the same time, but only prompts the first connection for authentication, which allows remote attackers to gain access.

How urgent is CVE-2003-1475?

Priority 47/100. Public exploit reference

References

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