CVE-2000-0950: Format string vulnerability in x-gw in TIS Firewall Toolkit (FWTK) allows local users to execute arbitrary com

Routine

HIGH 7.2DOWNGRADE

CVE-2000-0950 is a high-severity flaw (CVSS 7.2) affecting internet firewall toolkit. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Format string vulnerability in x-gw in TIS Firewall Toolkit (FWTK) allows local users to execute arbitrary commands via a malformed display name.

Why this priority

High severity

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

Risk facts

CVSS score	7.2 (High)
EPSS exploit chance	0.4% (top 66%)
CISA exploited list	No
Published	2000-12-19
Last modified	2026-09-23

Publisher (CNA): MITRE · Vendor: tis

Last updated 2026-09-23 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2000-12-19 05:00 UTCPublished CVE record published
2026-09-23 10:10 UTCUpdated Record last modified

tis internet firewall toolkit DOWNGRADE

Affected: 2.1

Fixed in: no fixed release known

Safe to downgrade to: a release before 2.1

1. Check installed version

apt-cache policy internet-firewall-toolkit || rpm -q internet-firewall-toolkit || internet-firewall-toolkit --version

2. No fixed release: DOWNGRADE to a release before 2.1 (Debian / Ubuntu)

apt-cache madison internet-firewall-toolkit sudo apt install internet-firewall-toolkit=<VERSION_BEFORE_2.1> sudo apt-mark hold internet-firewall-toolkit

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

dnf --showduplicates list internet-firewall-toolkit sudo dnf downgrade internet-firewall-toolkit-<VERSION_BEFORE_2.1> sudo dnf versionlock add internet-firewall-toolkit

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-2000-0950?

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

Is CVE-2000-0950 being exploited?

CVE-2000-0950 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-2000-0950 affect?

CVE-2000-0950 affects internet firewall toolkit. Severity is high (CVSS 7.2). Format string vulnerability in x-gw in TIS Firewall Toolkit (FWTK) allows local users to execute arbitrary commands via a malformed display name.

How urgent is CVE-2000-0950?

Priority 34/100. High severity

Related CVEs

CVE-2007-0201 HIGH 10.0 UPGRADE Buffer overflow in the cmd_usr function in ftp-gw in TIS Internet Firewall Toolkit (FWTK) allows remote attack

References

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