Hash Injection

Affecting sequelize package, versions <4.12.0

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Overview

sequelize is a promise-based Node.js ORM for Postgres, MySQL, MariaDB, SQLite and Microsoft SQL Server.

Affected versions of this package are vulnerable to Hash Injection. Using specially crafted requests an attacker can bypass secret_token protections on websites using sequalize.

For example:

db.Token.findOne({
      where: {
        token: req.query.token
      }
);

Node.js and other platforms allow nested parameters, i.e. token[$gt]=1 will be transformed into token = {"$gt":1}. When such a hash is passed into sequalize it will consider it a query (greater than 1) and find the first token in the DB, bypassing security of this endpoint.

Remediation

Upgrade sequelize to version 4.12.0 or higher.

References

CVSS Score

7.3
high severity
  • Attack Vector
    Network
  • Attack Complexity
    Low
  • Privileges Required
    None
  • User Interaction
    None
  • Scope
    Unchanged
  • Confidentiality
    Low
  • Integrity
    Low
  • Availability
    Low
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:P/RL:O/RC:C
Credit
Egor Homakov
CWE
CWE-77
Snyk ID
SNYK-JS-SEQUELIZE-174147
Disclosed
01 Mar, 2017
Published
07 Apr, 2019