CVE-2004-2273: efFingerD 0.2.12 allows remote attackers to cause a denial of service (daemon crash) via a packet with a singl

Routine

MEDIUM 5.0DOWNGRADE

CVE-2004-2273 is a medium-severity flaw (CVSS 5.0) affecting effingerd. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

efFingerD 0.2.12 allows remote attackers to cause a denial of service (daemon crash) via a packet with a single byte, which triggers a "Wrong protocol or connection state" error.

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	1.2% (top 31%)
CISA exploited list	No
Published	2004-12-31
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: evan sims

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 22:09 UTCUpdated Record last modified

evan sims effingerd DOWNGRADE

Affected: 0.2.12

Fixed in: no fixed release known

Safe to downgrade to: a release before 0.2.12

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 0.2.12 (Debian / Ubuntu)

apt-cache madison effingerd sudo apt install effingerd=<VERSION_BEFORE_0.2.12> sudo apt-mark hold effingerd

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

dnf --showduplicates list effingerd sudo dnf downgrade effingerd-<VERSION_BEFORE_0.2.12> sudo dnf versionlock add effingerd

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-2004-2273?

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

Is CVE-2004-2273 being exploited?

CVE-2004-2273 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-2004-2273 affect?

CVE-2004-2273 affects effingerd. Severity is medium (CVSS 5.0). efFingerD 0.2.12 allows remote attackers to cause a denial of service (daemon crash) via a packet with a single byte, which triggers a "Wrong protocol or connection state" error.

How urgent is CVE-2004-2273?

Priority 35/100. No elevated risk signals yet.

Related CVEs

CVE-2004-2272 MEDIUM 5.0 DOWNGRADE Buffer overflow in the sockFinger_DataArrival function in efFingerD 0.2.12 allows remote attackers to cause a

References

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