CVE-2005-3694: centericq 4.20.0-r3 with "Enable peer-to-peer communications" set allows remote attackers to cause a denial of

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HIGH 7.8WATCHLISTDOWNGRADE

CVE-2005-3694 is a high-severity flaw (CVSS 7.8) affecting centericq. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

centericq 4.20.0-r3 with "Enable peer-to-peer communications" set allows remote attackers to cause a denial of service (segmentation fault and crash) via short zero-length packets, and possibly packets of length 1 or 2, as demonstrated using Nessus.

Why this priority

High severity
EPSS top 4%: very likely to be exploited
Public exploit reference
On your watchlist

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	7.8 (High)
EPSS exploit chance	12.0% (top 4%)
CISA exploited list	No
Published	2005-11-20
Last modified	2026-06-16

Publisher (CNA): Debian GNU/Linux · Vendor: centericq

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

Am I affected?

Timeline

2005-11-20 20:03 UTCPublished CVE record published
2026-06-16 22:17 UTCUpdated Record last modified

centericq centericq DOWNGRADE

Affected: 4.20.0_r3

Fixed in: no fixed release known

Safe to downgrade to: a release before 4.20.0_r3

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 4.20.0_r3 (Debian / Ubuntu)

apt-cache madison centericq sudo apt install centericq=<VERSION_BEFORE_4.20.0_r3> sudo apt-mark hold centericq

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

dnf --showduplicates list centericq sudo dnf downgrade centericq-<VERSION_BEFORE_4.20.0_r3> sudo dnf versionlock add centericq

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.

Public exploits and detection

Public code exists for this CVE. Treat unpatched systems as at risk, and only run PoCs in a lab.

Exploit-DB: CenterICQ 4.20/4.5 - Packet Handling Remote Denial of Service

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-2005-3694?

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

Is CVE-2005-3694 being exploited?

CVE-2005-3694 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-2005-3694 affect?

CVE-2005-3694 affects centericq. Severity is high (CVSS 7.8). centericq 4.20.0-r3 with "Enable peer-to-peer communications" set allows remote attackers to cause a denial of service (segmentation fault and crash) via short zero-length packets, and possibly packets of length 1 or 2, as demonstrated usin

How urgent is CVE-2005-3694?

Priority 61/100. High severity; EPSS top 4%: very likely to be exploited; Public exploit reference; On your watchlist

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References

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