CVE-2000-0183: Buffer overflow in ircII 4.4 IRC client allows remote attackers to execute commands via the DCC chat capabilit

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MEDIUM 5.1DOWNGRADE

CVE-2000-0183 is a medium-severity flaw (CVSS 5.1) affecting ircii. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Buffer overflow in ircII 4.4 IRC client allows remote attackers to execute commands via the DCC chat capability.

Why this priority

EPSS top 6%: very likely to be exploited
Public exploit reference

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

Risk facts

CVSS score	5.1 (Medium)
EPSS exploit chance	7.5% (top 6%)
CISA exploited list	No
Published	2000-03-10
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: michael sandrof

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

Am I affected?

Timeline

2000-03-10 05:00 UTCPublished CVE record published
2026-06-16 21:51 UTCUpdated Record last modified

michael sandrof ircii DOWNGRADE

Affected: 4.4.7

Fixed in: no fixed release known

Safe to downgrade to: a release before 4.4.7

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 4.4.7 (Debian / Ubuntu)

apt-cache madison ircii sudo apt install ircii=<VERSION_BEFORE_4.4.7> sudo apt-mark hold ircii

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

dnf --showduplicates list ircii sudo dnf downgrade ircii-<VERSION_BEFORE_4.4.7> sudo dnf versionlock add ircii

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: Michael Sandrof IrcII 4.4-7 - Remote Buffer Overflow

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-2000-0183?

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

Is CVE-2000-0183 being exploited?

CVE-2000-0183 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-2000-0183 affect?

CVE-2000-0183 affects ircii. Severity is medium (CVSS 5.1). Buffer overflow in ircII 4.4 IRC client allows remote attackers to execute commands via the DCC chat capability.

How urgent is CVE-2000-0183?

Priority 46/100. EPSS top 6%: very likely to be exploited; Public exploit reference

Related CVEs

CVE-2021-29376 HIGH 7.5 UPGRADE MITIGATE ircII before 20210314 allows remote attackers to cause a denial of service (segmentation fault and client cras
CVE-2003-0323 HIGH 7.5 DOWNGRADE Multiple buffer overflows in ircII 20020912 allows remote malicious IRC servers to cause a denial of service (

References

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