CVE-2001-0764: Buffer overflow in ntping in scotty 2.1.0 allows local users to execute arbitrary code via a long hostname as

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HIGH 7.2DOWNGRADE

CVE-2001-0764 is a high-severity flaw (CVSS 7.2) affecting scotty. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Buffer overflow in ntping in scotty 2.1.0 allows local users to execute arbitrary code via a long hostname as a command line argument.

Why this priority

High severity
Public exploit reference

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

Risk facts

CVSS score	7.2 (High)
EPSS exploit chance	1.4% (top 27%)
CISA exploited list	No
Published	2001-10-18
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: juergen schoenwaelder

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

juergen schoenwaelder scotty DOWNGRADE

Affected: 2.1.7 · 2.1.8 · 2.1.9 · 2.1.10

Fixed in: no fixed release known

Safe to downgrade to: a release before 2.1.7

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 2.1.7 (Debian / Ubuntu)

apt-cache madison scotty sudo apt install scotty=<VERSION_BEFORE_2.1.7> sudo apt-mark hold scotty

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

dnf --showduplicates list scotty sudo dnf downgrade scotty-<VERSION_BEFORE_2.1.7> sudo dnf versionlock add scotty

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.

Public exploits and detection

Public code exists for this CVE. Treat unpatched systems as at risk, and only run PoCs in a lab.

Exploit-DB: Juergen Schoenwaelder scotty 2.1.x - ntping Buffer Overflow

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-2001-0764?

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

Is CVE-2001-0764 being exploited?

CVE-2001-0764 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-2001-0764 affect?

CVE-2001-0764 affects scotty. Severity is high (CVSS 7.2). Buffer overflow in ntping in scotty 2.1.0 allows local users to execute arbitrary code via a long hostname as a command line argument.

How urgent is CVE-2001-0764?

Priority 49/100. High severity; Public exploit reference

References

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