CVEvulnerability
CVE-2017-15271
5.9 MEDIUM
Official page ↗
- Status
- Modified
- Published
- 2017-11-15
- Last modified
- 2026-06-17
- Assigner
- [email protected]
- CVSS 3.0 ([email protected])
- 5.9 MEDIUM — CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
- CVSS 2.0 ([email protected])
- 4.3 MEDIUM — AV:N/AC:M/Au:N/C:N/I:N/A:P
- Weaknesses
- CWE-416
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.
Affected configurations
• psftp psftpd 10.0.4
Related
Weakness · CWE (1)
- CWE-416 Use After Free weakness
References
- http://packetstormsecurity.com/files/144972/PSFTPd-Windows-FTP-Server-10.0.4-Build-729-Use-After-Free-Log-Injection.html Third Party Advisory, VDB Entry
- http://www.securityfocus.com/archive/1/541518/100/0/threaded www.securityfocus.com
- https://www.exploit-db.com/exploits/43144/ Third Party Advisory, VDB Entry
- https://www.x41-dsec.de/lab/advisories/x41-2017-006-psftpd/ Third Party Advisory
- http://packetstormsecurity.com/files/144972/PSFTPd-Windows-FTP-Server-10.0.4-Build-729-Use-After-Free-Log-Injection.html Third Party Advisory, VDB Entry
- http://www.securityfocus.com/archive/1/541518/100/0/threaded www.securityfocus.com
- https://www.exploit-db.com/exploits/43144/ Third Party Advisory, VDB Entry
- https://www.x41-dsec.de/lab/advisories/x41-2017-006-psftpd/ Third Party Advisory