CVE-2000-0573
The lreply function in wu-ftpd 2.6.0 and earlier does not properly cleanse an untrusted format string, which allows remote attackers to execute arbitrary commands via the SITE EXEC command.
EPSS Exploitation Probability
EPSS (Exploit Prediction Scoring System) is a daily probability model maintained by FIRST.org. It estimates the likelihood a CVE will be exploited in production environments within the next 30 days, derived from real-world threat intelligence signals.
Description
The lreply function in wu-ftpd 2.6.0 and earlier does not properly cleanse an untrusted format string, which allows remote attackers to execute arbitrary commands via the SITE EXEC command.
Research use only. For defensive security, authorized penetration testing, and academic research only. Never execute exploit code against systems without explicit written authorization.
WU-FTPD 2.6.0 - Remote Command Execution
by venglin · Nov 21, 2000
WU-FTPD 2.4.2/2.5 .0/2.6.0 - Remote Format String Stack Overwrite (1)
by tf8 · Oct 15, 1999
WU-FTPD - Site EXEC/INDEX Format String (Metasploit)
by Metasploit · Nov 30, 2010
WU-FTPD 2.4.2/2.5 .0/2.6.0 - Remote Format String Stack Overwrite (3)
by justme · May 4, 2001
BeroFTPD 1.3.4(1) (Linux x86) - Remote Code Execution
by qitest1 · May 8, 2001
WU-FTPD 2.4.2/2.5 .0/2.6.0 - Remote Format String Stack Overwrite (2)
by vsz_ · Sep 26, 2000
WU-FTPD 2.6.0 - Remote Format Strings
by kalou · Jan 3, 2001
Detection & mitigation playbook
VulnerabilityDetect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for the affected component. O3's reachability analysis confirms whether the vulnerable code path is actually invoked in your application, so you act on real exposure instead of every transitive match.
Remediation status
No patched version of the affected component has shipped for CVE-2000-0573 yet. Where your build allows, override or pin the dependency away from the vulnerable range, and apply any maintainer-recommended mitigation.
Mitigate without a patch
If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.
How O3 protects you
O3 pinpoints whether CVE-2000-0573 is reachable in your code and exactly where to fix it, then blocks exploitation in production at runtime until the patched version is deployed.
Tailored to CVE-2000-0573. Runtime protection reduces exposure until a permanent patch is applied and verified — it complements patching, it doesn't replace it.
Frequently Asked Questions
Is CVE-2000-0573 in your dependencies?
O3 detects CVE-2000-0573 across dependencies and uses function-level reachability to confirm whether the vulnerable code path is actually reachable — not just present. No false positives.