CVE-2004-2593: Buffer overflow in command-packet processing of Quake II server before R1Q2, as used in multiple products, all

This month

HIGH 7.5DOWNGRADE

CVE-2004-2593 is a high-severity flaw (CVSS 7.5) affecting quake ii server. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Buffer overflow in command-packet processing of Quake II server before R1Q2, as used in multiple products, allows remote attackers to cause a denial of service (crash) and possibly execute arbitrary code via a packet with a long cmd_args buffer.

Why this priority

High severity

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

Risk facts

CVSS score	7.5 (High)
EPSS exploit chance	3.8% (top 10%)
CISA exploited list	No
Published	2004-12-31
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

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

id software quake ii server DOWNGRADE

Affected: 3.20 · 3.21

Fixed in: no fixed release known

Safe to downgrade to: a release before 3.20

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 3.20 (Debian / Ubuntu)

apt-cache madison quake-ii-server sudo apt install quake-ii-server=<VERSION_BEFORE_3.20> sudo apt-mark hold quake-ii-server

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

dnf --showduplicates list quake-ii-server sudo dnf downgrade quake-ii-server-<VERSION_BEFORE_3.20> sudo dnf versionlock add quake-ii-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-2004-2593?

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

Is CVE-2004-2593 being exploited?

CVE-2004-2593 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-2004-2593 affect?

CVE-2004-2593 affects quake ii server. Severity is high (CVSS 7.5). Buffer overflow in command-packet processing of Quake II server before R1Q2, as used in multiple products, allows remote attackers to cause a denial of service (crash) and possibly execute arbitrary code via a packet with a long cmd_args bu

How urgent is CVE-2004-2593?

Priority 49/100. High severity

Related CVEs

CVE-2004-2597 MEDIUM 5.0 DOWNGRADE Quake II server before R1Q2, as used in multiple products, allows remote attackers to bypass IP-based access c
CVE-2004-2596 MEDIUM 5.0 DOWNGRADE Quake II server before R1Q2, as used in multiple products, allows remote attackers to cause a denial of servic
CVE-2004-2592 MEDIUM 5.0 DOWNGRADE Quake II server before R1Q2, as used in multiple products, allows remote attackers to cause a denial of servic

References

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