CVE-2003-0931: Sygate Enforcer 4.0 earlier allows remote attackers to cause a denial of service (service hang) by replaying a

Q: How do I fix CVE-2003-0931?

enforcer: upgrade to newer than 4.0. Exact commands for each OS are on this page.

Q: Is CVE-2003-0931 being exploited?

CVE-2003-0931 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2003-0931 affect?

CVE-2003-0931 affects enforcer. Severity is medium (CVSS 5.0). Sygate Enforcer 4.0 earlier allows remote attackers to cause a denial of service (service hang) by replaying a malformed discovery packet to UDP port 39999.

Q: How urgent is CVE-2003-0931?

Priority 36/100. No elevated risk signals yet.

Routine

MEDIUM 5.0UPGRADE

CVE-2003-0931 is a medium-severity flaw (CVSS 5.0) affecting enforcer. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Sygate Enforcer 4.0 earlier allows remote attackers to cause a denial of service (service hang) by replaying a malformed discovery packet to UDP port 39999.

Why this priority

No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score	5.0 (Medium)
EPSS exploit chance	1.6% (top 25%)
CISA exploited list	No
Published	2004-09-28
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: sygate technologies

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

Am I affected?

Timeline

2004-09-28 04:00 UTCPublished CVE record published
2026-06-16 22:03 UTCUpdated Record last modified

sygate technologies enforcer UPGRADE

Affected: <= 4.0

Fixed in: newer than 4.0

Safe to downgrade to: no unaffected older release

1. Check installed version

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

2. UPGRADE to newer than 4.0 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade enforcer

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade enforcer

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

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-2003-0931?

enforcer: upgrade to newer than 4.0. Exact commands for each OS are on this page.

Is CVE-2003-0931 being exploited?

CVE-2003-0931 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-2003-0931 affect?

CVE-2003-0931 affects enforcer. Severity is medium (CVSS 5.0). Sygate Enforcer 4.0 earlier allows remote attackers to cause a denial of service (service hang) by replaying a malformed discovery packet to UDP port 39999.

How urgent is CVE-2003-0931?

Priority 36/100. No elevated risk signals yet.

Related CVEs

CVE-2004-0593 HIGH 7.5 UPGRADE DOWNGRADE Sygate Enforcer 3.5MR1 and earlier passes broadcast traffic before authentication, which could allow remote at

References

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