CVE-2024-31399: Excessive platform resource consumption within a loop issue exists in Cybozu Garoon 5.0.0 to 5.15.2

Routine

MEDIUM 6.5UPGRADE

CVE-2024-31399 is a medium-severity flaw (CVSS 6.5) affecting garoon. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Excessive platform resource consumption within a loop issue exists in Cybozu Garoon 5.0.0 to 5.15.2. If this vulnerability is exploited, processing a crafted mail may cause a denial-of-service (DoS) condition.

Why this priority

No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score	6.5 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	0.4% (top 69%)
CISA exploited list	No
Weakness	CWE-400
Published	2024-06-11
Last modified	2026-06-17

Publisher (CNA): JPCERT/CC · Vendor: cybozu

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2024-06-11 06:15 UTCPublished CVE record published
2026-06-17 07:28 UTCUpdated Record last modified

cybozu garoon UPGRADE

Affected: >= 5.0.0 and <= 5.15.2

Fixed in: newer than 5.15.2

Safe to downgrade to: a release before 5.0.0

1. Check installed version

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

2. UPGRADE to newer than 5.15.2 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade garoon

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade garoon

Note

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

3. If no update is available yet, DOWNGRADE to a release before 5.0.0 (Debian / Ubuntu)

apt-cache madison garoon sudo apt install garoon=<VERSION_BEFORE_5.0.0> sudo apt-mark hold garoon

3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list garoon sudo dnf downgrade garoon-<VERSION_BEFORE_5.0.0> sudo dnf versionlock add garoon

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-2024-31399?

garoon: upgrade to newer than 5.15.2. Exact commands for each OS are on this page.

Is CVE-2024-31399 being exploited?

CVE-2024-31399 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-2024-31399 affect?

CVE-2024-31399 affects garoon. Severity is medium (CVSS 6.5). Excessive platform resource consumption within a loop issue exists in Cybozu Garoon 5.0.0 to 5.15.2. If this vulnerability is exploited, processing a crafted mail may cause a denial-of-service (DoS) condition.

How urgent is CVE-2024-31399?

Priority 30/100. No elevated risk signals yet.

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References

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