CVE-2017-15271
PSFTPd SFTP Use-After-Free DoS
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.
INFO
Published Date :
Nov. 15, 2017, 4:29 p.m.
Last Modified :
Nov. 21, 2024, 3:14 a.m.
Source :
[email protected]
Remotely Exploitable :
Yes !
Impact Score :
3.6
Exploitability Score :
2.2
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2017-15271.
| URL | Resource |
|---|---|
| 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 | |
| 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 | |
| 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 |
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2017-15271 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2017-15271 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Modified by [email protected]
May. 14, 2024
Action Type Old Value New Value -
CVE Modified by [email protected]
Oct. 09, 2018
Action Type Old Value New Value Removed Reference http://www.securityfocus.com/archive/1/archive/1/541518/100/0/threaded [Third Party Advisory, VDB Entry] Added Reference http://www.securityfocus.com/archive/1/541518/100/0/threaded [No Types Assigned] -
Initial Analysis by [email protected]
Dec. 03, 2017
Action Type Old Value New Value Added CVSS V2 (AV:N/AC:M/Au:N/C:N/I:N/A:P) Added CVSS V3 AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H Changed Reference Type https://www.exploit-db.com/exploits/43144/ No Types Assigned https://www.exploit-db.com/exploits/43144/ Third Party Advisory, VDB Entry Changed Reference Type http://www.securityfocus.com/archive/1/archive/1/541518/100/0/threaded No Types Assigned http://www.securityfocus.com/archive/1/archive/1/541518/100/0/threaded Third Party Advisory, VDB Entry Changed Reference Type http://packetstormsecurity.com/files/144972/PSFTPd-Windows-FTP-Server-10.0.4-Build-729-Use-After-Free-Log-Injection.html No Types Assigned 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 Changed Reference Type https://www.x41-dsec.de/lab/advisories/x41-2017-006-psftpd/ No Types Assigned https://www.x41-dsec.de/lab/advisories/x41-2017-006-psftpd/ Third Party Advisory Added CWE CWE-416 Added CPE Configuration OR *cpe:2.3:a:psftp:psftpd:10.0.4:*:*:*:*:*:*:* -
CVE Modified by [email protected]
Nov. 17, 2017
Action Type Old Value New Value Added Reference https://www.exploit-db.com/exploits/43144/ [No Types Assigned]
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2017-15271 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2017-15271
weaknesses.
Exploit Prediction
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.
0.49 }} -0.20%
score
0.73290
percentile