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Vulnerability of Symfony: user account enumeration

Synthesis of the vulnerability 

An attacker can check names of Symfony users with a timing attack.
Vulnerable software: Fedora, Symfony.
Severity of this announce: 1/4.
Creation date: 12/05/2021.
Revision date: 19/05/2021.
Références of this computer vulnerability: CVE-2021-21424, FEDORA-2021-121edb82dd, FEDORA-2021-2d145b95f6, FEDORA-2021-c57937ab9f, FEDORA-2021-f3ad34aa9f, VIGILANCE-VUL-35407.

Description of the vulnerability 

An attacker can check names of Symfony users with a timing attack.
Full bulletin, software filtering, emails, fixes, ... (Request your free trial)

This computer vulnerability note impacts software or systems such as Fedora, Symfony.

Our Vigil@nce team determined that the severity of this computer vulnerability announce is low.

The trust level is of type confirmed by the editor, with an origin of internet client.

An attacker with a expert ability can exploit this cybersecurity announce.

Solutions for this threat 

Symfony: versions 3.4.49, 4.4.24 and 5.2.9.
Versions 3.4.49, 4.4.24 and 5.2.9 are fixed:
  https://symfony.com/

Fedora 33: new php-symfony3 packages.
New packages are available:
  Fedora 33: php-symfony3 3.4.49-1.fc33

Fedora 33: new php-symfony4 packages.
New packages are available:
  Fedora 33: php-symfony4 4.4.24-1.fc33

Fedora 34: new php-symfony3 packages.
New packages are available:
  Fedora 34: php-symfony3 3.4.49-1.fc34

Fedora 34: new php-symfony4 packages.
New packages are available:
  Fedora 34: php-symfony4 4.4.24-1.fc34
Full bulletin, software filtering, emails, fixes, ... (Request your free trial)

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