CVE-2005-2366: Unknown vulnerability in the BER dissector in Ethereal 0.10.11 allows remote attackers to cause a denial of se

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MEDIUM 5.0DOWNGRADE

CVE-2005-2366 is a medium-severity flaw (CVSS 5.0) affecting ethereal. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Unknown vulnerability in the BER dissector in Ethereal 0.10.11 allows remote attackers to cause a denial of service (abort or infinite loop) via unknown attack vectors.

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	3.5% (top 11%)
CISA exploited list	No
Published	2005-08-10
Last modified	2026-06-16

Publisher (CNA): Red Hat, Inc. · Vendor: ethereal group

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

Am I affected?

Timeline

2005-08-10 04:00 UTCPublished CVE record published
2026-06-16 22:14 UTCUpdated Record last modified

ethereal group ethereal DOWNGRADE

Affected: 0.10.11

Fixed in: no fixed release known

Safe to downgrade to: a release before 0.10.11

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 0.10.11 (Debian / Ubuntu)

apt-cache madison ethereal sudo apt install ethereal=<VERSION_BEFORE_0.10.11> sudo apt-mark hold ethereal

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

dnf --showduplicates list ethereal sudo dnf downgrade ethereal-<VERSION_BEFORE_0.10.11> sudo dnf versionlock add ethereal

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-2005-2366?

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

Is CVE-2005-2366 being exploited?

CVE-2005-2366 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-2005-2366 affect?

CVE-2005-2366 affects ethereal. Severity is medium (CVSS 5.0). Unknown vulnerability in the BER dissector in Ethereal 0.10.11 allows remote attackers to cause a denial of service (abort or infinite loop) via unknown attack vectors.

How urgent is CVE-2005-2366?

Priority 40/100. No elevated risk signals yet.

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References

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