CVE-2004-0647: shorewall 1.4.10c and earlier, and 2.0.x before 2.0.3a, allows local users to overwrite arbitrary files via a

Routine

MEDIUM 4.6DOWNGRADE

CVE-2004-0647 is a medium-severity flaw (CVSS 4.6) affecting shorewall. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

shorewall 1.4.10c and earlier, and 2.0.x before 2.0.3a, allows local users to overwrite arbitrary files via a symlink attack on the chains-$$ temporary file.

Why this priority

No elevated risk signals yet

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

Risk facts

CVSS score	4.6 (Medium)
EPSS exploit chance	0.3% (top 72%)
CISA exploited list	No
Published	2004-08-06
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: shorewall

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

Am I affected?

Timeline

2004-08-06 04:00 UTCPublished CVE record published
2026-06-16 22:06 UTCUpdated Record last modified

shorewall shorewall DOWNGRADE

Affected: 1.4 · 1.4.1 · 1.4.2 · 1.4.3 · 1.4.3a · 1.4.4 · 1.4.5 · 1.4.6

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.4

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 1.4 (Debian / Ubuntu)

apt-cache madison shorewall sudo apt install shorewall=<VERSION_BEFORE_1.4> sudo apt-mark hold shorewall

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

dnf --showduplicates list shorewall sudo dnf downgrade shorewall-<VERSION_BEFORE_1.4> sudo dnf versionlock add shorewall

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-2004-0647?

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

Is CVE-2004-0647 being exploited?

CVE-2004-0647 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-2004-0647 affect?

CVE-2004-0647 affects shorewall. Severity is medium (CVSS 4.6). shorewall 1.4.10c and earlier, and 2.0.x before 2.0.3a, allows local users to overwrite arbitrary files via a symlink attack on the chains-$$ temporary file.

How urgent is CVE-2004-0647?

Priority 23/100. No elevated risk signals yet.

Related CVEs

CVE-2005-2317 HIGH 7.5 DOWNGRADE Shorewall 2.4.x before 2.4.1, 2.2.x before 2.2.5, and 2.0.x before 2.0.17, when MACLIST_TTL is greater than 0

References

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