CVE-2017-15271 - CVE House
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Status published Medium CVE-2017-15271

A use-after-free issue could be triggered remotely in the SFTP...

Vulnerability 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.

Impact Analysis

Refer to official advisory for detailed impact metrics.

Remediation

Ensure systems are updated to the latest vendor-supplied patch levels.

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Credits & Attribution

No credits recorded in the NVD database.

References

More from psftp

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CVE-2017-15272
The PSFTPd 10.0.4 Build 729 server stores its configuration inside...
Medium 5.3
CVE-2017-15270
The PSFTPd 10.0.4 Build 729 server does not properly escape...
Medium 5.3
CVE-2017-15269
The PSFTPd 10.0.4 Build 729 server does not prevent FTP...
Medium 4.3

Affected Vendor

Affected Software

psftpd
Vulnerable Versions:
10.0.4

Timeline

Official Publish: November 15th, 2017
Last Modified: August 5th, 2024
Added to House: July 20th, 2026

CVSS Vectors

V3: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

Weaknesses (CWE)

No CWE data available

MITRE ATT&CK TTPs

No associated TTPs found for this vulnerability.