CVE-2004-0456: Stack-based buffer overflow in pavuk 0.9pl28, 0.9pl27, and possibly other versions allows remote web sites to

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HIGH 7.6WATCHLISTDOWNGRADEMITIGATEMITIGATE

CVE-2004-0456 is a high-severity flaw (CVSS 7.6) affecting pavuk, debian linux, linux. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Stack-based buffer overflow in pavuk 0.9pl28, 0.9pl27, and possibly other versions allows remote web sites to execute arbitrary code via a long HTTP Location header.

Why this priority

High severity
On your watchlist

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

Risk facts

CVSS score	7.6 (High)
EPSS exploit chance	2.9% (top 13%)
CISA exploited list	No
Published	2004-12-06
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: debian · gentoo · pavuk

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

Am I affected?

Timeline

2004-12-06 05:00 UTCPublished CVE record published
2026-06-16 22:05 UTCUpdated Record last modified

pavuk pavuk DOWNGRADE

Affected: 0.9pl28i · 0.928r1

Fixed in: no fixed release known

Safe to downgrade to: a release before 0.9pl28i

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 0.9pl28i (Debian / Ubuntu)

apt-cache madison pavuk sudo apt install pavuk=<VERSION_BEFORE_0.9pl28i> sudo apt-mark hold pavuk

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

dnf --showduplicates list pavuk sudo dnf downgrade pavuk-<VERSION_BEFORE_0.9pl28i> sudo dnf versionlock add pavuk

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.

debian debian linux MITIGATE

Affected: 3.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 3.0

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

gentoo linux MITIGATE

Affected: 1.1a · 1.2 · 1.4 · 1.4 rc1 · 1.4 rc2 · 1.4 rc3

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.1a

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

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-2004-0456?

pavuk: downgrade or apply the listed mitigation; debian linux: mitigate or apply the listed mitigation; linux: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2004-0456 being exploited?

CVE-2004-0456 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-2004-0456 affect?

CVE-2004-0456 affects pavuk, debian linux, linux. Severity is high (CVSS 7.6). Stack-based buffer overflow in pavuk 0.9pl28, 0.9pl27, and possibly other versions allows remote web sites to execute arbitrary code via a long HTTP Location header.

How urgent is CVE-2004-0456?

Priority 53/100. High severity; On your watchlist

Software pages

Debian vulnerabilities

Related CVEs

CVE-2005-1035 HIGH 7.5 DOWNGRADE Multiple buffer overflows in Pavuk before 0.9.32 have unknown attack vectors and impact.
CVE-2004-1437 HIGH 7.5 DOWNGRADE Multiple buffer overflows in the digest authentication functionality in Pavuk 0.9.28-r2 and earlier allow remo

References

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