CVE-2004-1395: The Lithtech engine, as used in (1) Contract Jack 1.1 and earlier, (2) No one lives forever 2 1.3 and earlier,

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MEDIUM 5.0DOWNGRADEDOWNGRADEDOWNGRADE

CVE-2004-1395 is a medium-severity flaw (CVSS 5.0) affecting contract jack, no one lives forever 2, tron. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

The Lithtech engine, as used in (1) Contract Jack 1.1 and earlier, (2) No one lives forever 2 1.3 and earlier, (3) Tron 2.0 1.042 and earlier, (4) F.E.A.R. (First Encounter Assault and Recon), and possibly other games, allows remote attackers to cause a denial of service (connection refused) via a UDP packet that causes recvfrom to generate a return code that causes the listening loop to exit, as demonstrated using zero byte packets or packets be

Why this priority

EPSS top 10%: 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	3.8% (top 10%)
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 contract jack DOWNGRADE

Affected: 1.1

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.1

1. Check installed version

apt-cache policy contract-jack || rpm -q contract-jack || contract-jack --version

2. No fixed release: DOWNGRADE to a release before 1.1 (Debian / Ubuntu)

apt-cache madison contract-jack sudo apt install contract-jack=<VERSION_BEFORE_1.1> sudo apt-mark hold contract-jack

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

dnf --showduplicates list contract-jack sudo dnf downgrade contract-jack-<VERSION_BEFORE_1.1> sudo dnf versionlock add contract-jack

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 2 DOWNGRADE

Affected: 1.0.004 · 1.3

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-2 || rpm -q no-one-lives-forever-2 || no-one-lives-forever-2 --version

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

apt-cache madison no-one-lives-forever-2 sudo apt install no-one-lives-forever-2=<VERSION_BEFORE_1.0.004> sudo apt-mark hold no-one-lives-forever-2

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

dnf --showduplicates list no-one-lives-forever-2 sudo dnf downgrade no-one-lives-forever-2-<VERSION_BEFORE_1.0.004> sudo dnf versionlock add no-one-lives-forever-2

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 tron DOWNGRADE

Affected: 2.0.1.0 · 2.0.1.42

Fixed in: no fixed release known

Safe to downgrade to: a release before 2.0.1.0

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 2.0.1.0 (Debian / Ubuntu)

apt-cache madison tron sudo apt install tron=<VERSION_BEFORE_2.0.1.0> sudo apt-mark hold tron

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

dnf --showduplicates list tron sudo dnf downgrade tron-<VERSION_BEFORE_2.0.1.0> sudo dnf versionlock add tron

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: Lithtech Engine (new protocol) - Socket Unreacheable 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-2004-1395?

contract jack: downgrade or apply the listed mitigation; no one lives forever 2: downgrade or apply the listed mitigation; tron: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2004-1395 being exploited?

CVE-2004-1395 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-2004-1395 affect?

CVE-2004-1395 affects contract jack, no one lives forever 2, tron. Severity is medium (CVSS 5.0). The Lithtech engine, as used in (1) Contract Jack 1.1 and earlier, (2) No one lives forever 2 1.3 and earlier, (3) Tron 2.0 1.042 and earlier, (4) F.E.A.R. (First Encounter Assault and Recon), and possibly other games, allows remote attacke

How urgent is CVE-2004-1395?

Priority 45/100. EPSS top 10%: 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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