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TI-2017-11188 Aliases CVE-2017-15271GHSA-fcg6-9hqq-q764

A use-after-free issue could be triggered remotely in the SFTP component of PSFTPd 10.0.4…

Priority LOW 38CWE-416Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
High
Impact type
Denial of service
Confidentiality · integrity · availability
None · None · High
Fix status
No fix listed

Attack profile from CVSS 3.0 · NVD. Fix status from CNA. Impact type from CWE-416 and the CVSS impact.

Summary

A use-after-free issue could be triggered remotely in the SFTP component of PSFTPd 10.0.4 Build 729. This issue could be triggered prior to authentication. The PSFTPd server did not automatically restart, which enabled attackers to perform a very effective DoS attack against this service. By sending a crafted SSH identification / version string to the server, a NULL pointer dereference could be caused, apparently because of a race condition in the window message handling, performing the cleanup for invalid connections. This incorrect cleanup code has a use-after-free.

Why it matters now

EPSS 0.08742 95th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by the CNA
Fix No fix listed No fixed version in the sources yet

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
——all versions—No fix listedCNA
  • — Vendor— Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:psftp:psftpd:10.0.4:*:*:*:*:*:*:*10.0.4VulnerablePsftp
  • cpe:2.3:a:psftp:psftpd:10.0.4:*:*:*:*:*:*:* Versions 10.0.4 Vulnerable ·Psftp

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2017-15271
  2. 2026-10-03 Alias added: GHSA-fcg6-9hqq-q764

References

Exploit 1

Advisory 2

  • TI-2017-11187 The PSFTPd 10.0.4 Build 729 server does not properly escape data before writing it into a… CVSS 3.0MEDIUM 5.3
  • TI-2017-11189 The PSFTPd 10.0.4 Build 729 server stores its configuration inside PSFTPd.dat. CVSS 3.0MEDIUM 5.3
  • TI-2017-11186 The PSFTPd 10.0.4 Build 729 server does not prevent FTP bounce scans by default. CVSS 3.0MEDIUM 4.3

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences