CVE-2004-2597: Quake II server before R1Q2, as used in multiple products, allows remote attackers to bypass IP-based access c

Routine

MEDIUM 5.0DOWNGRADE

CVE-2004-2597 is a medium-severity flaw (CVSS 5.0) affecting quake ii server. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Quake II server before R1Q2, as used in multiple products, allows remote attackers to bypass IP-based access control rules via a userinfo string that already contains an "ip" key/value pair but is also long enough to cause a new key/value pair to be truncated, which interferes with the server's ability to find the client's IP address.

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	1.6% (top 24%)
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-2004-2597?

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

Is CVE-2004-2597 being exploited?

CVE-2004-2597 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-2004-2597 affect?

CVE-2004-2597 affects quake ii server. Severity is medium (CVSS 5.0). Quake II server before R1Q2, as used in multiple products, allows remote attackers to bypass IP-based access control rules via a userinfo string that already contains an "ip" key/value pair but is also long enough to cause a new key/value p

How urgent is CVE-2004-2597?

Priority 37/100. No elevated risk signals yet.

Related CVEs

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-2004-2593 HIGH 7.5 DOWNGRADE Buffer overflow in command-packet processing of Quake II server before R1Q2, as used in multiple products, all
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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