CVE-2000-0023: Buffer overflow in Lotus Domino HTTP server allows remote attackers to cause a denial of service via a long UR

Routine

MEDIUM 5.0DOWNGRADE

CVE-2000-0023 is a medium-severity flaw (CVSS 5.0) affecting domino server. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Buffer overflow in Lotus Domino HTTP server allows remote attackers to cause a denial of service via a long URL.

Why this priority

No elevated risk signals yet

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

Risk facts

CVSS score	5.0 (Medium)
EPSS exploit chance	1.4% (top 28%)
CISA exploited list	No
Published	1999-12-21
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: lotus

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

Am I affected?

Timeline

1999-12-21 05:00 UTCPublished CVE record published
2026-06-16 21:50 UTCUpdated Record last modified

lotus domino server DOWNGRADE

Affected: 4.6 · 4.6.x

Fixed in: no fixed release known

Safe to downgrade to: a release before 4.6

1. Check installed version

apt-cache policy domino-server || rpm -q domino-server || domino-server --version

2. No fixed release: DOWNGRADE to a release before 4.6 (Debian / Ubuntu)

apt-cache madison domino-server sudo apt install domino-server=<VERSION_BEFORE_4.6> sudo apt-mark hold domino-server

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

dnf --showduplicates list domino-server sudo dnf downgrade domino-server-<VERSION_BEFORE_4.6> sudo dnf versionlock add domino-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-2000-0023?

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

Is CVE-2000-0023 being exploited?

CVE-2000-0023 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-2000-0023 affect?

CVE-2000-0023 affects domino server. Severity is medium (CVSS 5.0). Buffer overflow in Lotus Domino HTTP server allows remote attackers to cause a denial of service via a long URL.

How urgent is CVE-2000-0023?

Priority 36/100. No elevated risk signals yet.

Related CVEs

CVE-2003-1408 MEDIUM 5.0 DOWNGRADE Lotus Domino Server 5.0 and 6.0 allows remote attackers to read the source code for files via an HTTP request
CVE-2001-0009 MEDIUM 5.0 DOWNGRADE Directory traversal vulnerability in Lotus Domino 5.0.5 web server allows remote attackers to read arbitrary f
CVE-2000-0022 MEDIUM 5.0 DOWNGRADE Lotus Domino HTTP server does not properly disable anonymous access for the cgi-bin directory.
CVE-2000-0021 MEDIUM 5.0 DOWNGRADE Lotus Domino HTTP server allows remote attackers to determine the real path of the server via a request to a n

References

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