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Case File

CVE-2017-15271

MEDIUM · CVSS 5.9 EPSS 8.74% Public Exploit

Source: NVD + CISA KEV + EPSS (historical backfill) · Published 2017-11-15 · Last synced 2026-08-04

Field Assessment

AI analysis pending.

Exhibit — Public Exploit Signal

A public exploit, PoC, GitHub repository or Metasploit reference was detected for this CVE.

Note: these links are listed for security research and verification purposes only.

CVE
CVE-2017-15271
Severity
MEDIUM
CVSS
5.9
EPSS
8.74%

Original Filing — NVD Description

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.