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MEDIUM6.3

GHSA-3gv2-29qc-v67m

Symfony vulnerable to Session Fixation of CSRF tokens

Quick fix

GHSA-3gv2-29qc-v67m — symfony/security-bundle: upgrade to the fixed version with the command below.

composer require symfony/security-bundle:^4.4.50

Details

Description -----------

When authenticating users Symfony by default regenerates the session ID upon login, but preserves the rest of session attributes. Because this does not clear CSRF tokens upon login, this might enables [same-site attackers](https://canitakeyoursubdomain.name/) to bypass the CSRF protection mechanism by performing an attack similar to a session-fixation.

Resolution ----------

Symfony removes all CSRF tokens from the session on successful login.

The patch for this issue is available [here](https://github.com/symfony/symfony/commit/5909d74ecee359ea4982fcf4331aaf2e489a1fd4) for branch 4.4.

Credits -------

We would like to thank Marco Squarcina for reporting the issue and Nicolas Grekas for fixing it.

Are you affected?

Enter the version of the package you're using.

Affected packages

Packagist/symfony/security-bundle
Introduced in: 2.0.0Fixed in: 4.4.50
Fixcomposer require symfony/security-bundle:^4.4.50
Packagist/symfony/security-bundle
Introduced in: 5.0.0Fixed in: 5.4.20
Fixcomposer require symfony/security-bundle:^5.4.20
Packagist/symfony/security-bundle
Introduced in: 6.0.0Fixed in: 6.0.20
Fixcomposer require symfony/security-bundle:^6.0.20
Packagist/symfony/security-bundle
Introduced in: 6.1.0Fixed in: 6.1.12
Fixcomposer require symfony/security-bundle:^6.1.12
Packagist/symfony/security-bundle
Introduced in: 6.2.0Fixed in: 6.2.6
Fixcomposer require symfony/security-bundle:^6.2.6
Packagist/symfony/symfony
Introduced in: 2.0.0Fixed in: 4.4.50
Fixcomposer require symfony/symfony:^4.4.50
Packagist/symfony/symfony
Introduced in: 5.0.0Fixed in: 5.4.20
Fixcomposer require symfony/symfony:^5.4.20
Packagist/symfony/symfony
Introduced in: 6.0.0Fixed in: 6.0.20
Fixcomposer require symfony/symfony:^6.0.20
Packagist/symfony/symfony
Introduced in: 6.1.0Fixed in: 6.1.12
Fixcomposer require symfony/symfony:^6.1.12
Packagist/symfony/symfony
Introduced in: 6.2.0Fixed in: 6.2.6
Fixcomposer require symfony/symfony:^6.2.6

References