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This repository was archived by the owner on Apr 3, 2024. It is now read-only.

Changing Revolt Username allows for impersonation of Meower users

High
showierdata9978 published GHSA-33jw-463c-pm6j Apr 1, 2023

Package

MeowerBot.py (MeowerBot.py)

Affected versions

25adc62f98e97e59968cdb89e05ca199cfad5da2 and below

Patched versions

f21a5a8168a0c9f6b6db72dfc0919cd5a784e8c8 and above

Description

Summary

Changing your Revolt username allows you to impersonate any Meower user without a Revolt account.

Details

Because it uses the Revolt username as the username for Meower, anyone can change their Revolt username to a Meower username to post as them with the BRIDGED tag.
Screenshot 2023-04-01 at 2 52 09 pm

Screenshot 2023-04-01 at 2 52 04 pm

Screenshot 2023-04-01 at 2 58 52 pm

PoC

  1. Change your Revolt username to any Meower username not already registered on Revolt
  2. Post

Impact

This is an impersonation risk that can affect every Meower user without a Revolt Account under the exact username.

Severity

High

CVSS overall score

This score calculates overall vulnerability severity from 0 to 10 and is based on the Common Vulnerability Scoring System (CVSS).
/ 10

CVSS v3 base metrics

Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
High
Availability
None

CVSS v3 base metrics

Attack vector: More severe the more the remote (logically and physically) an attacker can be in order to exploit the vulnerability.
Attack complexity: More severe for the least complex attacks.
Privileges required: More severe if no privileges are required.
User interaction: More severe when no user interaction is required.
Scope: More severe when a scope change occurs, e.g. one vulnerable component impacts resources in components beyond its security scope.
Confidentiality: More severe when loss of data confidentiality is highest, measuring the level of data access available to an unauthorized user.
Integrity: More severe when loss of data integrity is the highest, measuring the consequence of data modification possible by an unauthorized user.
Availability: More severe when the loss of impacted component availability is highest.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

CVE ID

No known CVE

Weaknesses

No CWEs

Credits