CVE-2004-0938: FreeRADIUS before 1.0.1 allows remote attackers to cause a denial of service (server crash) by sending an Asce

Q: How do I fix CVE-2004-0938?

freeradius: upgrade to newer than 1.0.1. Exact commands for each OS are on this page.

Q: Is CVE-2004-0938 being exploited?

CVE-2004-0938 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-2004-0938 affect?

CVE-2004-0938 affects freeradius. Severity is medium (CVSS 5.0). FreeRADIUS before 1.0.1 allows remote attackers to cause a denial of service (server crash) by sending an Ascend-Send-Secret attribute without the required leading packet.

Q: How urgent is CVE-2004-0938?

Priority 40/100. No elevated risk signals yet.

This month

MEDIUM 5.0UPGRADE

CVE-2004-0938 is a medium-severity flaw (CVSS 5.0) affecting freeradius. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

FreeRADIUS before 1.0.1 allows remote attackers to cause a denial of service (server crash) by sending an Ascend-Send-Secret attribute without the required leading packet.

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	3.7% (top 10%)
CISA exploited list	No
Published	2004-11-03
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: freeradius

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

Am I affected?

Timeline

2004-11-03 05:00 UTCPublished CVE record published
2026-06-16 22:06 UTCUpdated Record last modified

freeradius freeradius UPGRADE

Affected: <= 1.0.1

Fixed in: newer than 1.0.1

Safe to downgrade to: no unaffected older release

1. Check installed version

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

2. UPGRADE to newer than 1.0.1 (Debian / Ubuntu)

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

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade freeradius

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-2004-0938?

freeradius: upgrade to newer than 1.0.1. Exact commands for each OS are on this page.

Is CVE-2004-0938 being exploited?

CVE-2004-0938 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-2004-0938 affect?

CVE-2004-0938 affects freeradius. Severity is medium (CVSS 5.0). FreeRADIUS before 1.0.1 allows remote attackers to cause a denial of service (server crash) by sending an Ascend-Send-Secret attribute without the required leading packet.

How urgent is CVE-2004-0938?

Priority 40/100. No elevated risk signals yet.

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References

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