Description
The accept_client function in PureFTPd 1.0.18 and earlier allows remote attackers to cause a denial of service by exceeding the maximum number of connections.
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 13 | pure-ftpd | 1.0.19-1 | — |
| Debian 12 | pure-ftpd | 1.0.19-1 | — |
Automated scanner template
A ready-made Nuclei template detects this vulnerability automatically. Vulnerabilities with public scanner templates are typically probed across the internet soon after the template appears — exposed systems should be patched first.
- Pure-FTPd ≤ 1.0.18 - DoS via Connection Limit Exhaustion network/cves/2004/CVE-2004-0656.yaml
Source: projectdiscovery/nuclei-templates (MIT) — updated daily. Only links are listed.
References
- pure-ftpd-acceptclient-dos(16611) vdb-entry
- http://www.pureftpd.org/
- GLSA-200407-04 vendor-advisory