Denial of Service (DoS) Affecting wger package, versions [,1.7)
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Test your applications- Snyk ID SNYK-PYTHON-WGER-40595
- published 9 Nov 2015
- disclosed 9 Nov 2015
- credit Unknown
Overview
wger is a FLOSS workout, fitness and weight manager/tracker written with Django.
Affected versions of this package are vulnerable to Denial-of-Service (DoS) attacks. There are no limit checks when uploading csv files, and it is possible to upload large files and cause the server to get stuck iterating through the rows.
Details
Denial of Service (DoS) describes a family of attacks, all aimed at making a system inaccessible to its intended and legitimate users.
Unlike other vulnerabilities, DoS attacks usually do not aim at breaching security. Rather, they are focused on making websites and services unavailable to genuine users resulting in downtime.
One popular Denial of Service vulnerability is DDoS (a Distributed Denial of Service), an attack that attempts to clog network pipes to the system by generating a large volume of traffic from many machines.
When it comes to open source libraries, DoS vulnerabilities allow attackers to trigger such a crash or crippling of the service by using a flaw either in the application code or from the use of open source libraries.
Two common types of DoS vulnerabilities:
High CPU/Memory Consumption- An attacker sending crafted requests that could cause the system to take a disproportionate amount of time to process. For example, commons-fileupload:commons-fileupload.
Crash - An attacker sending crafted requests that could cause the system to crash. For Example, npm
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