CVE-2001-1488: Open Projects Network Internet Relay Chat (IRC) daemon u2.10.05.18 does not perform a double-reverse DNS looku

Routine

MEDIUM 5.0DOWNGRADE

CVE-2001-1488 is a medium-severity flaw (CVSS 5.0) affecting open projects network ircd. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Open Projects Network Internet Relay Chat (IRC) daemon u2.10.05.18 does not perform a double-reverse DNS lookup, which allows remote attackers to spoof any valid hostname on the Internet. NOTE: a followup post suggests that this is not an issue in the daemon.

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	1.3% (top 29%)
CISA exploited list	No
Published	2001-12-31
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: open projects network

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

Am I affected?

Timeline

2001-12-31 05:00 UTCPublished CVE record published
2026-06-16 21:56 UTCUpdated Record last modified

open projects network open projects network ircd DOWNGRADE

Affected: u2.10.05.18

Fixed in: no fixed release known

Safe to downgrade to: a release before u2.10.05.18

1. Check installed version

apt-cache policy open-projects-network-ircd || rpm -q open-projects-network-ircd || open-projects-network-ircd --version

2. No fixed release: DOWNGRADE to a release before u2.10.05.18 (Debian / Ubuntu)

apt-cache madison open-projects-network-ircd sudo apt install open-projects-network-ircd=<VERSION_BEFORE_u2.10.05.18> sudo apt-mark hold open-projects-network-ircd

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

dnf --showduplicates list open-projects-network-ircd sudo dnf downgrade open-projects-network-ircd-<VERSION_BEFORE_u2.10.05.18> sudo dnf versionlock add open-projects-network-ircd

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-2001-1488?

open projects network ircd: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2001-1488 being exploited?

CVE-2001-1488 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-2001-1488 affect?

CVE-2001-1488 affects open projects network ircd. Severity is medium (CVSS 5.0). Open Projects Network Internet Relay Chat (IRC) daemon u2.10.05.18 does not perform a double-reverse DNS lookup, which allows remote attackers to spoof any valid hostname on the Internet. NOTE: a followup post suggests that this is not an

How urgent is CVE-2001-1488?

Priority 35/100. No elevated risk signals yet.

References

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