CVE-2004-1255: Buffer overflow in the expandtabs function in 2fax 3.04 allows remote attackers to execute arbitrary code via

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HIGH 10.0DOWNGRADE

CVE-2004-1255 is a high-severity flaw (CVSS 10.0) affecting 2fax. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Buffer overflow in the expandtabs function in 2fax 3.04 allows remote attackers to execute arbitrary code via a text file that is converted to TIFF.

Why this priority

Critical severity
EPSS top 7%: very likely to be exploited
Public exploit reference

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

Risk facts

CVSS score	10.0 (High)
EPSS exploit chance	6.0% (top 7%)
CISA exploited list	No
Published	2005-01-10
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: 2fax

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

Am I affected?

Timeline

2005-01-10 05:00 UTCPublished CVE record published
2026-06-16 22:07 UTCUpdated Record last modified

2fax 2fax DOWNGRADE

Affected: 3.0_4

Fixed in: no fixed release known

Safe to downgrade to: a release before 3.0_4

1. Check installed version

apt-cache policy 2fax || rpm -q 2fax || 2fax --version

2. No fixed release: DOWNGRADE to a release before 3.0_4 (Debian / Ubuntu)

apt-cache madison 2fax sudo apt install 2fax=<VERSION_BEFORE_3.0_4> sudo apt-mark hold 2fax

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

dnf --showduplicates list 2fax sudo dnf downgrade 2fax-<VERSION_BEFORE_3.0_4> sudo dnf versionlock add 2fax

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-2004-1255?

2fax: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2004-1255 being exploited?

CVE-2004-1255 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-2004-1255 affect?

CVE-2004-1255 affects 2fax. Severity is high (CVSS 10.0). Buffer overflow in the expandtabs function in 2fax 3.04 allows remote attackers to execute arbitrary code via a text file that is converted to TIFF.

How urgent is CVE-2004-1255?

Priority 63/100. Critical severity; EPSS top 7%: very likely to be exploited; Public exploit reference

References

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