Medium severity5.9NVD Advisory· Published Nov 15, 2017· Updated Jun 17, 2026
CVE-2017-15271
CVE-2017-15271
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.
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Affected products
3- Range: 10.0.4 Build 729
Patches
Vulnerability mechanics
References
4- packetstormsecurity.com/files/144972/PSFTPd-Windows-FTP-Server-10.0.4-Build-729-Use-After-Free-Log-Injection.htmlnvdThird Party AdvisoryVDB Entry
- www.exploit-db.com/exploits/43144/nvdThird Party AdvisoryVDB Entry
- www.x41-dsec.de/lab/advisories/x41-2017-006-psftpd/nvdThird Party Advisory
- www.securityfocus.com/archive/1/541518/100/0/threadednvd
News mentions
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