CVE-2004-0849: Integer overflow in the asn_decode_string() function defined in asn1.c in radiusd for GNU Radius 1.1 and 1.2 b

Routine

MEDIUM 5.0DOWNGRADE

CVE-2004-0849 is a medium-severity flaw (CVSS 5.0) affecting radius. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Integer overflow in the asn_decode_string() function defined in asn1.c in radiusd for GNU Radius 1.1 and 1.2 before 1.2.94, when compiled with the --enable-snmp option, allows remote attackers to cause a denial of service (daemon crash) via certain SNMP requests.

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 25%)
CISA exploited list	No
Published	2004-12-23
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: gnu

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

Am I affected?

Timeline

2004-12-23 05:00 UTCPublished CVE record published
2026-06-16 22:06 UTCUpdated Record last modified

gnu radius DOWNGRADE

Affected: 0.92.1 · 0.93 · 0.94 · 0.95 · 0.96 · 1.1 · 1.2

Fixed in: no fixed release known

Safe to downgrade to: a release before 0.92.1

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 0.92.1 (Debian / Ubuntu)

apt-cache madison radius sudo apt install radius=<VERSION_BEFORE_0.92.1> sudo apt-mark hold radius

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

dnf --showduplicates list radius sudo dnf downgrade radius-<VERSION_BEFORE_0.92.1> sudo dnf versionlock add radius

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-2004-0849?

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

Is CVE-2004-0849 being exploited?

CVE-2004-0849 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-2004-0849 affect?

CVE-2004-0849 affects radius. Severity is medium (CVSS 5.0). Integer overflow in the asn_decode_string() function defined in asn1.c in radiusd for GNU Radius 1.1 and 1.2 before 1.2.94, when compiled with the --enable-snmp option, allows remote attackers to cause a denial of service (daemon crash) via

How urgent is CVE-2004-0849?

Priority 36/100. No elevated risk signals yet.

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References

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