CVE-2001-0769: Memory leak in GuildFTPd Server 0.97 allows remote attackers to cause a denial of service via a request contai

Routine

MEDIUM 5.0DOWNGRADE

CVE-2001-0769 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.

Memory leak in GuildFTPd Server 0.97 allows remote attackers to cause a denial of service via a request containing a null character.

Why this priority

No elevated risk signals yet

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

Risk facts

CVSS score	5.0 (Medium)
EPSS exploit chance	1.3% (top 30%)
CISA exploited list	No
Published	2001-10-18
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

2001-10-18 04:00 UTCPublished CVE record published
2026-06-16 21:54 UTCUpdated Record last modified

steve poulsen guildftpd DOWNGRADE

Affected: 0.97

Fixed in: no fixed release known

Safe to downgrade to: a release before 0.97

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 0.97 (Debian / Ubuntu)

apt-cache madison guildftpd sudo apt install guildftpd=<VERSION_BEFORE_0.97> sudo apt-mark hold guildftpd

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

dnf --showduplicates list guildftpd sudo dnf downgrade guildftpd-<VERSION_BEFORE_0.97> 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-2001-0769?

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

Is CVE-2001-0769 being exploited?

CVE-2001-0769 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-2001-0769 affect?

CVE-2001-0769 affects guildftpd. Severity is medium (CVSS 5.0). Memory leak in GuildFTPd Server 0.97 allows remote attackers to cause a denial of service via a request containing a null character.

How urgent is CVE-2001-0769?

Priority 35/100. No elevated risk signals yet.

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-2003-1267 MEDIUM 5.0 DOWNGRADE GuildFTPd 0.999 allows remote attackers to cause a denial of service (crash) via a GET request for MS-DOS devi
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-2001-0768 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

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