CVE-1999-1568
Ncftp Ncftpd — CWE-193
CVSS 7.5 HighEPSS 1.4%
- CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- Published: 1999-01-01T05:00:00.000
- Last modified: 2025-04-03T01:03:51.193
- Vendors: Ncftp
- Products: Ncftpd
- CWE: CWE-193
Off-by-one error in NcFTPd FTP server before 2.4.1 allows a remote attacker to cause a denial of service (crash) via a long PORT command.
Related CVE by CWE
No related CWE found.
Top CVE for Vendor
- CVE-1999-1568 (CVSS 7.5)
Recently Exploited Similar Vulnerabilities
No recent KEV-listed items for this vendor/product.
How to fix CVE-1999-1568
CVE-1999-1568 is a high severity vulnerability affecting Ncftp Ncftpd.
Description: Off-by-one error in NcFTPd FTP server before 2.4.1 allows a remote attacker to cause a denial of service (crash) via a long PORT command. Related CVE by CWENo related CWE found.Top CVE for VendorCVE-1999-1568 (CVSS 7.5)Recently Exploited Similar VulnerabilitiesNo recent KEV-listed items for this vendor/product.
Exploit Difficulty: EASY
⏱️ Time to exploit: < 1 hour
🛠️ Required skills: Basic web security knowledge
💰 Public exploits: Likely available
How to Fix:
- Check if you're running Ncftpd
- Update to the latest patched version
- If patching is not immediately possible: restrict network exposure, apply least-privilege access
- Test the fix in a staging environment first
- Review logs for signs of exploitation
- Monitor for IOCs (Indicators of Compromise)
- Enable automatic security updates
- Set up vulnerability monitoring
- Review and harden security configurations
Description: Off-by-one error in NcFTPd FTP server before 2.4.1 allows a remote attacker to cause a denial of service (crash) via a long PORT command. Related CVE by CWENo related CWE found.Top CVE for VendorCVE-1999-1568 (CVSS 7.5)Recently Exploited Similar VulnerabilitiesNo recent KEV-listed items for this vendor/product.
Exploit Difficulty: EASY
⏱️ Time to exploit: < 1 hour
🛠️ Required skills: Basic web security knowledge
💰 Public exploits: Likely available
How to Fix:
1 Identify affected systems
- Check if you're running Ncftpd
2 Immediate actions
- Update to the latest patched version
- If patching is not immediately possible: restrict network exposure, apply least-privilege access
3 Verification
- Test the fix in a staging environment first
- Review logs for signs of exploitation
- Monitor for IOCs (Indicators of Compromise)
4 Long-term prevention
- Enable automatic security updates
- Set up vulnerability monitoring
- Review and harden security configurations
CWE: CWE-193
Exploit Difficulty Assessment
EASY
Time to Exploit: < 1 hour
Skills Required: Basic web security knowledge
Public Exploits: Likely available
Vulnerability Timeline
Jan 01, 1999
Vulnerability Published
CVE details first published to NVD database
Apr 03, 2025
Last Modified
CVE details were updated
Oct 31, 2025
Imported to Database
Added to this CVE tracking system
Detection Rules & IOCs
No specific detection rules generated for this vulnerability type.
- http://marc.info/?l=bugtraq&m=91981352617720&w=2 [Mailing List]
- http://www.securityfocus.com/archive/1/12699 [Broken Link, Third Party Advisory, VDB Entry]
- https://exchange.xforce.ibmcloud.com/vulnerabilities/1833 [Third Party Advisory, VDB Entry]
- http://marc.info/?l=bugtraq&m=91981352617720&w=2 [Mailing List]
- http://www.securityfocus.com/archive/1/12699 [Broken Link, Third Party Advisory, VDB Entry]
- https://exchange.xforce.ibmcloud.com/vulnerabilities/1833 [Third Party Advisory, VDB Entry]
No explicit mitigation/advisory links found in references.