CVE-2003-0466

Description

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.

Key data

EPSS

Exploit Prediction Scoring System by FIRST: an estimate of the probability that exploitation activity will be observed in the next 30 days.

Score: 0.78115 (78.1% probability)
Percentile: 99.6%
Scores of: Nov 10, 2026
Model: v2026.06.15

References

Links listed in the CVE record. They lead to other sites, which CubePath does not control.

20030804 Off-by-one Buffer Overflow Vulnerability in BSD libc realpath(3) (marc.info)mailing-list
isec.pl/vulnerabilities/isec-0011-wu-ftpd.txt
9446 (secunia.com)third-party-advisory
6602 (osvdb.org)vdb-entry
oval:org.mitre.oval:def:1970 (oval.cisecurity.org)vdb-entrysignature
20060213 Latest wu-ftpd exploit :-s (securityfocus.com)mailing-list
8315 (securityfocus.com)vdb-entry
9423 (secunia.com)third-party-advisory
20030731 wu-ftpd fb_realpath() off-by-one bug (marc.info)mailing-list
20030731 wu-ftpd fb_realpath() off-by-one bug (archives.neohapsis.com)mailing-list
IMNX-2003-7+-019-01 (download.immunix.org)vendor-advisory
RHSA-2003:246 (redhat.com)vendor-advisory
20060214 Re: Latest wu-ftpd exploit :-s (securityfocus.com)mailing-list
VU#743092 (kb.cert.org)third-party-advisory
RHSA-2003:245 (redhat.com)vendor-advisory
SuSE-SA:2003:032 (novell.com)vendor-advisory
1001257 (sunsolve.sun.com)vendor-advisory
DSA-357 (debian.org)vendor-advisory
20030804 wu-ftpd-2.6.2 off-by-one remote exploit. (marc.info)mailing-list
1007380 (securitytracker.com)vdb-entry
MDKSA-2003:080 (mandriva.com)vendor-advisory
libc-realpath-offbyone-bo(12785) (exchange.xforce.ibmcloud.com)vdb-entry
FreeBSD-SA-03:08 (marc.info)vendor-advisory
TLSA-2003-46 (turbolinux.com)vendor-advisory
9535 (secunia.com)third-party-advisory
9447 (secunia.com)third-party-advisory

Timeline

ID reservedJun 26, 2003
Record publishedAug 1, 2003
Record last updatedAug 8, 2024

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Data from the CVE Program (MITRE), CISA KEV and FIRST EPSS. CVSS is owned by FIRST and used by permission. Not affiliated with or endorsed by MITRE, CISA or FIRST. Data as of Nov 10, 2026, 19:46 UTC. Sources and licenses