CVE-2004-1587: Buffer overflow in Monolith games including (1) Alien versus Predator 2 1.0.9.6 and earlier, (2) Blood 2 2.1 a

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MEDIUM 5.0DOWNGRADEDOWNGRADEDOWNGRADE

CVE-2004-1587 is a medium-severity flaw (CVSS 5.0) affecting alien versus predator, blood, no one lives forever. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Buffer overflow in Monolith games including (1) Alien versus Predator 2 1.0.9.6 and earlier, (2) Blood 2 2.1 and earlier, (3) No one lives forever 1.004 and earlier and (4) Shogo 2.2 and earlier allows remote attackers to cause a denial of service (application crash) via a long secure Gamespy query.

Why this priority

EPSS top 8%: very likely to be exploited
Public exploit reference

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

Risk facts

CVSS score	5.0 (Medium)
EPSS exploit chance	5.2% (top 8%)
CISA exploited list	No
Published	2004-12-31
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: monolith productions

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 22:07 UTCUpdated Record last modified

monolith productions alien versus predator DOWNGRADE

Affected: 2.1.0.9.6

Fixed in: no fixed release known

Safe to downgrade to: a release before 2.1.0.9.6

1. Check installed version

apt-cache policy alien-versus-predator || rpm -q alien-versus-predator || alien-versus-predator --version

2. No fixed release: DOWNGRADE to a release before 2.1.0.9.6 (Debian / Ubuntu)

apt-cache madison alien-versus-predator sudo apt install alien-versus-predator=<VERSION_BEFORE_2.1.0.9.6> sudo apt-mark hold alien-versus-predator

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

dnf --showduplicates list alien-versus-predator sudo dnf downgrade alien-versus-predator-<VERSION_BEFORE_2.1.0.9.6> sudo dnf versionlock add alien-versus-predator

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.

monolith productions blood DOWNGRADE

Affected: 2_2.1

Fixed in: no fixed release known

Safe to downgrade to: a release before 2_2.1

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 2_2.1 (Debian / Ubuntu)

apt-cache madison blood sudo apt install blood=<VERSION_BEFORE_2_2.1> sudo apt-mark hold blood

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

dnf --showduplicates list blood sudo dnf downgrade blood-<VERSION_BEFORE_2_2.1> sudo dnf versionlock add blood

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.

monolith productions no one lives forever DOWNGRADE

Affected: 1.0.004

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.0.004

1. Check installed version

apt-cache policy no-one-lives-forever || rpm -q no-one-lives-forever || no-one-lives-forever --version

2. No fixed release: DOWNGRADE to a release before 1.0.004 (Debian / Ubuntu)

apt-cache madison no-one-lives-forever sudo apt install no-one-lives-forever=<VERSION_BEFORE_1.0.004> sudo apt-mark hold no-one-lives-forever

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

dnf --showduplicates list no-one-lives-forever sudo dnf downgrade no-one-lives-forever-<VERSION_BEFORE_1.0.004> sudo dnf versionlock add no-one-lives-forever

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.

monolith productions shogo DOWNGRADE

Affected: 2.2

Fixed in: no fixed release known

Safe to downgrade to: a release before 2.2

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 2.2 (Debian / Ubuntu)

apt-cache madison shogo sudo apt install shogo=<VERSION_BEFORE_2.2> sudo apt-mark hold shogo

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

dnf --showduplicates list shogo sudo dnf downgrade shogo-<VERSION_BEFORE_2.2> sudo dnf versionlock add shogo

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: Monolith Games - Local Buffer Overflow (PoC)

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-2004-1587?

alien versus predator: downgrade or apply the listed mitigation; blood: downgrade or apply the listed mitigation; no one lives forever: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2004-1587 being exploited?

CVE-2004-1587 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-2004-1587 affect?

CVE-2004-1587 affects alien versus predator, blood, no one lives forever. Severity is medium (CVSS 5.0). Buffer overflow in Monolith games including (1) Alien versus Predator 2 1.0.9.6 and earlier, (2) Blood 2 2.1 and earlier, (3) No one lives forever 1.004 and earlier and (4) Shogo 2.2 and earlier allows remote attackers to cause a denial of

How urgent is CVE-2004-1587?

Priority 46/100. EPSS top 8%: very likely to be exploited; Public exploit reference

Related CVEs

CVE-2004-1500 LOW 2.1 DOWNGRADE DOWNGRADE Format string vulnerability in the Lithtech engine, as used in multiple games, allows remote authenticated use

References

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