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Fencer Vulns
high 7.5

CVE-2001-0405 in the critical feed json

ip_conntrack_ftp in the IPTables firewall for Linux 2.4 allows remote attackers to bypass access restrictions for an FTP server via a PORT…

published 2001-07-02 25 y ago modified 2026-06-16 4 mo ago also EUVD-2001-0402

cvss
7.5
version 2.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
10.3%
EPSS 10.3% chance of exploitation in 30 days, percentile 95%
public exploits
1
Exploit-DB

Summary

ip_conntrack_ftp in the IPTables firewall for Linux 2.4 allows remote attackers to bypass access restrictions for an FTP server via a PORT command that lists an arbitrary IP address and port number, which is added to the RELATED table and allowed by the firewall.

Patch / fix

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2001-0405 updated

security flaw

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Timeline

  1. First public exploit (EDB-20765)
  2. Published

Exploit prediction

10.25% chance of exploitation in the next 30 days, higher than 95% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • EDB-20765 Linux Kernel 2.4 - IPTables FTP Stateful Inspection Arbitrary Filter Rule Insertion remote, 2001-04-16
  • archives.neohapsis.com http://archives.neohapsis.com/archives/bugtraq/2001-04/0271.html referenced PoC, tagged "exploit" by a source, unverified
  • securityfocus.com http://www.securityfocus.com/bid/2602 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 2.0 7.5 AV:N/AC:L/Au:N/C:P/I:P/A:P

Classification

Technology feeds

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.