Allows large characters in password filling in athou/commafeed

Valid

Reported on

Jul 5th 2022


Description

The commafeedapplication allows large characters to insert in the input field "password" which can allow attackers to cause a Denial of Service (DoS) via a crafted HTTP request.

Proof of Concept

1. Register a new account.
2. Fill a normal email, fill the "Password" and "Password (agian)" input field with huge characters (more than 1 lakh)
3. Register 
You will see the application accepts large characters and if we will increase the characters then it can lead to Dos.

Payload

You can get the large character at there (you can increase more) https://drive.google.com/file/d/1Q_optB_MfI7byzpS7SB8kPeVNc2DebwT/view?usp=sharing

Patch recommendation:

The password input should be limited to 50 characters or less

Impact

This weakness will generally lead to undefined behavior and therefore crashes. Such as DoS: Crash, Exit, or Restart; DoS: Resource Consumption (CPU); DoS: Resource Consumption (Memory); DoS: Instability

We are processing your report and will contact the athou/commafeed team within 24 hours. a month ago
Jérémie Panzer modified the Severity from Critical to Low a month ago
The researcher has received a minor penalty to their credibility for miscalculating the severity: -1
Jérémie Panzer validated this vulnerability a month ago
saharshtapi has been awarded the disclosure bounty
The fix bounty is now up for grabs
The researcher's credibility has increased: +7
Jérémie Panzer confirmed that a fix has been merged on 899a8d a month ago
The fix bounty has been dropped
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