CVE-1999-1569: Quake 1 and NetQuake servers allow remote attackers to cause a denial of service (resource exhaustion or force

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MEDIUM 5.0DOWNGRADE

CVE-1999-1569 is a medium-severity flaw (CVSS 5.0) affecting quake. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Quake 1 and NetQuake servers allow remote attackers to cause a denial of service (resource exhaustion or forced disconnection) via a flood of spoofed UDP connection packets, which exceeds the server's player limit.

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	3.2% (top 12%)
CISA exploited list	No
Published	2001-07-17
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: id software

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

Am I affected?

Timeline

2001-07-17 04:00 UTCPublished CVE record published
2026-06-16 21:50 UTCUpdated Record last modified

id software quake DOWNGRADE

Affected: 1.9

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.9

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 1.9 (Debian / Ubuntu)

apt-cache madison quake sudo apt install quake=<VERSION_BEFORE_1.9> sudo apt-mark hold quake

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

dnf --showduplicates list quake sudo dnf downgrade quake-<VERSION_BEFORE_1.9> sudo dnf versionlock add quake

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: ID Software Quake 1.9 - Denial of Service

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-1999-1569?

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

Is CVE-1999-1569 being exploited?

CVE-1999-1569 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-1999-1569 affect?

CVE-1999-1569 affects quake. Severity is medium (CVSS 5.0). Quake 1 and NetQuake servers allow remote attackers to cause a denial of service (resource exhaustion or forced disconnection) via a flood of spoofed UDP connection packets, which exceeds the server's player limit.

How urgent is CVE-1999-1569?

Priority 45/100. Public exploit reference

Related CVEs

CVE-2000-1080 MEDIUM 5.0 DOWNGRADE DOWNGRADE Quake 1 (quake1) and ProQuake 1.01 and earlier allow remote attackers to cause a denial of service via a malfo

References

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