CVE-2003-1267: GuildFTPd 0.999 allows remote attackers to cause a denial of service (crash) via a GET request for MS-DOS devi

This month

MEDIUM 5.0DOWNGRADE

CVE-2003-1267 is a medium-severity flaw (CVSS 5.0) affecting guildftpd. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

GuildFTPd 0.999 allows remote attackers to cause a denial of service (crash) via a GET request for MS-DOS device names such as lpt1.

Why this priority

Public exploit reference

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

Risk facts

CVSS score	5.0 (Medium)
EPSS exploit chance	1.7% (top 23%)
CISA exploited list	No
Published	2003-12-31
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: steve poulsen

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

Am I affected?

Timeline

2003-12-31 05:00 UTCPublished CVE record published
2026-06-16 22:03 UTCUpdated Record last modified

steve poulsen guildftpd DOWNGRADE

Affected: 0.999

Fixed in: no fixed release known

Safe to downgrade to: a release before 0.999

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 0.999 (Debian / Ubuntu)

apt-cache madison guildftpd sudo apt install guildftpd=<VERSION_BEFORE_0.999> sudo apt-mark hold guildftpd

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

dnf --showduplicates list guildftpd sudo dnf downgrade guildftpd-<VERSION_BEFORE_0.999> sudo dnf versionlock add guildftpd

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-2003-1267?

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

Is CVE-2003-1267 being exploited?

CVE-2003-1267 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-2003-1267 affect?

CVE-2003-1267 affects guildftpd. Severity is medium (CVSS 5.0). GuildFTPd 0.999 allows remote attackers to cause a denial of service (crash) via a GET request for MS-DOS device names such as lpt1.

How urgent is CVE-2003-1267?

Priority 42/100. Public exploit reference

Related CVEs

CVE-2008-4572 HIGH 10.0 DOWNGRADE GuildFTPd 0.999.14, and possibly other versions, allows remote attackers to cause a denial of service (crash)
CVE-2006-5133 HIGH 7.5 DOWNGRADE Buffer overflow in GuildFTPd 0.999.13 allows remote attackers to have an unknown impact, possibly code executi
CVE-2001-0770 HIGH 7.5 DOWNGRADE Buffer overflow in GuildFTPd Server 0.97 allows remote attacker to execute arbitrary code via a long SITE comm
CVE-2001-0769 MEDIUM 5.0 DOWNGRADE Memory leak in GuildFTPd Server 0.97 allows remote attackers to cause a denial of service via a request contai
CVE-2001-0768 MEDIUM 4.6 DOWNGRADE GuildFTPd 0.9.7 stores user names and passwords in plaintext in the default.usr file, which allows local users

References

← Back to latest CVEs