CVE-2012-6084: modules/m_capab.c in (1) ircd-ratbox before 3.0.8 and (2) Charybdis before 3.4.2 does not properly support cap

Q: How do I fix CVE-2012-6084?

ircd-ratbox: downgrade or apply the listed mitigation; ircd-ratbox: upgrade to newer than 3.0.7. Exact commands for each OS are on this page.

Q: Is CVE-2012-6084 being exploited?

CVE-2012-6084 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2012-6084 affect?

CVE-2012-6084 affects ircd-ratbox, ircd-ratbox. Severity is medium (CVSS 5.0). modules/m_capab.c in (1) ircd-ratbox before 3.0.8 and (2) Charybdis before 3.4.2 does not properly support capability negotiation during server handshakes, which allows remote attackers to cause a denial of service (NULL pointer dereference

Q: How urgent is CVE-2012-6084?

Priority 39/100. No elevated risk signals yet.

Routine

MEDIUM 5.0DOWNGRADEUPGRADE

CVE-2012-6084 is a medium-severity flaw (CVSS 5.0) affecting ircd-ratbox, ircd-ratbox. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

modules/m_capab.c in (1) ircd-ratbox before 3.0.8 and (2) Charybdis before 3.4.2 does not properly support capability negotiation during server handshakes, which allows remote attackers to cause a denial of service (NULL pointer dereference and daemon crash) via a malformed request.

Why this priority

No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score	5.0 (Medium)
EPSS exploit chance	3.0% (top 12%)
CISA exploited list	No
Published	2013-01-01
Last modified	2026-06-16

Publisher (CNA): Red Hat, Inc. · Vendor: ircd-ratbox · ratbox

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

Am I affected?

Timeline

2013-01-01 15:55 UTCPublished CVE record published
2026-06-16 23:47 UTCUpdated Record last modified

ircd-ratbox ircd-ratbox DOWNGRADE

Affected: 1.0 · 1.1.1 · 1.1.2 · 1.2.1 · 1.2.2 · 1.2.3 · 1.3 · 1.3.1

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.0

1. Check installed version

apt-cache policy ircd-ratbox || rpm -q ircd-ratbox || ircd-ratbox --version

2. No fixed release: DOWNGRADE to a release before 1.0 (Debian / Ubuntu)

apt-cache madison ircd-ratbox sudo apt install ircd-ratbox=<VERSION_BEFORE_1.0> sudo apt-mark hold ircd-ratbox

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

dnf --showduplicates list ircd-ratbox sudo dnf downgrade ircd-ratbox-<VERSION_BEFORE_1.0> sudo dnf versionlock add ircd-ratbox

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.

ratbox ircd-ratbox UPGRADE

Affected: <= 3.0.7

Fixed in: newer than 3.0.7

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy ircd-ratbox || rpm -q ircd-ratbox || ircd-ratbox --version

2. UPGRADE to newer than 3.0.7 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade ircd-ratbox

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade ircd-ratbox

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

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-2012-6084?

ircd-ratbox: downgrade or apply the listed mitigation; ircd-ratbox: upgrade to newer than 3.0.7. Exact commands for each OS are on this page.

Is CVE-2012-6084 being exploited?

CVE-2012-6084 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-2012-6084 affect?

CVE-2012-6084 affects ircd-ratbox, ircd-ratbox. Severity is medium (CVSS 5.0). modules/m_capab.c in (1) ircd-ratbox before 3.0.8 and (2) Charybdis before 3.4.2 does not properly support capability negotiation during server handshakes, which allows remote attackers to cause a denial of service (NULL pointer dereference

How urgent is CVE-2012-6084?

Priority 39/100. No elevated risk signals yet.

Related CVEs

CVE-2015-5290 HIGH 7.5 DOWNGRADE A Denial of Service vulnerability exists in ircd-ratbox 3.0.9 in the MONITOR Command Handler.

References

← Back to latest CVEs