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Fencer Vulns
critical 9.8

CVE-2003-0466 in the critical feed json

Off-by-one error in the fb_realpath() function, as derived from the realpath function in BSD, may allow attackers to execute arbitrary code…

published 2003-08-01 23 y ago modified 2026-06-16 4 mo ago also EUVD-2003-0460

cvss
9.8
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
78.1%
EPSS 78.1% chance of exploitation in 30 days, percentile 99.5%
public exploits
5
Exploit-DB

Summary

Off-by-one error in the fb_realpath() function, as derived from the realpath function in BSD, may allow attackers to execute arbitrary code, as demonstrated in wu-ftpd 2.5.0 through 2.6.2 via commands that cause pathnames of length MAXPATHLEN+1 to trigger a buffer overflow, including (1) STOR, (2) RETR, (3) APPE, (4) DELE, (5) MKD, (6) RMD, (7) STOU, or (8) RNTO.

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-2003-0466 updated

security flaw

  • Red Hat Enterprise Linux ES version 2.1
    fixed: vendor fix RHSA-2003:246
  • Red Hat Linux 7.1 Red Hat Linux 7.2 Red Hat Linux 7.3 Red Hat Linux 8.0
    fixed: vendor fix RHSA-2003:245
  • Red Hat Linux Advanced Workstation 2.1
    fixed: vendor fix RHSA-2003:246

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-22976)
  2. Published

Exploit prediction

78.11% chance of exploitation in the next 30 days, higher than 99.5% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • EDB-22976 FreeBSD 4.8 - 'realpath()' Off-by-One Buffer Overflow remote, 2003-07-31
  • EDB-22975 WU-FTPD 2.6.0/2.6.1/2.6.2 - 'realpath()' Off-by-One Buffer Overflow remote, 2003-08-06
  • EDB-22974 WU-FTPD 2.6.2 - 'realpath()' Off-by-One Buffer Overflow remote, 2003-08-02
  • EDB-78 WU-FTPD 2.6.2 - Remote Command Execution remote, 2003-08-11
  • EDB-74 WU-FTPD 2.6.2 - Off-by-One Remote Command Execution remote, 2003-08-03
  • securityfocus.com http://www.securityfocus.com/bid/8315 referenced PoC, tagged "exploit" by a source, unverified
  • archives.neohapsis.com http://archives.neohapsis.com/archives/vulnwatch/2003-q3/0065.html referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 3.1 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD 2.0 10.0 AV:N/AC:L/Au:N/C:C/I:C/A:C

Classification

Weakness

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.