Vulnerabilities > CVE-2017-11747 - Improper Privilege Management vulnerability in Tinyproxy Project Tinyproxy
Attack vector
LOCAL Attack complexity
LOW Privileges required
LOW Confidentiality impact
NONE Integrity impact
NONE Availability impact
HIGH Summary
main.c in Tinyproxy 1.8.4 and earlier creates a /run/tinyproxy/tinyproxy.pid file after dropping privileges to a non-root account, which might allow local users to kill arbitrary processes by leveraging access to this non-root account for tinyproxy.pid modification before a root script executes a "kill `cat /run/tinyproxy/tinyproxy.pid`" command.
Vulnerable Configurations
Common Weakness Enumeration (CWE)
Common Attack Pattern Enumeration and Classification (CAPEC)
- Restful Privilege Elevation Rest uses standard HTTP (Get, Put, Delete) style permissions methods, but these are not necessarily correlated generally with back end programs. Strict interpretation of HTTP get methods means that these HTTP Get services should not be used to delete information on the server, but there is no access control mechanism to back up this logic. This means that unless the services are properly ACL'd and the application's service implementation are following these guidelines then an HTTP request can easily execute a delete or update on the server side. The attacker identifies a HTTP Get URL such as http://victimsite/updateOrder, which calls out to a program to update orders on a database or other resource. The URL is not idempotent so the request can be submitted multiple times by the attacker, additionally, the attacker may be able to exploit the URL published as a Get method that actually performs updates (instead of merely retrieving data). This may result in malicious or inadvertent altering of data on the server.
Nessus
| NASL family | Debian Local Security Checks |
| NASL id | DEBIAN_DLA-2163.NASL |
| description | A minor security issue and a severe packaging bug have been fixed in tinyproxy, a lightweight http proxy daemon. CVE-2017-11747 main.c in Tinyproxy created a /var/run/tinyproxy/tinyproxy.pid file after dropping privileges to a non-root account, which might have allowed local users to kill arbitrary processes by leveraging access to this non-root account for tinyproxy.pid modification before a root script executed a |
| last seen | 2020-04-07 |
| modified | 2020-04-02 |
| plugin id | 135098 |
| published | 2020-04-02 |
| reporter | This script is Copyright (C) 2020 and is owned by Tenable, Inc. or an Affiliate thereof. |
| source | https://www.tenable.com/plugins/nessus/135098 |
| title | Debian DLA-2163-1 : tinyproxy security update |
| code | |