Ecosyste.ms: Advisories

Security Advisories: GSA_kwCzR0hTQS1wang4LTk4NHAtN3AzeM4AA8IW

FOSUserBundle Entropy is lost in the TokenGenerator

Description

Because of the usage of base_convert which looses precision for large inputs, the entropy of tokens generated by FOSUserBundle for the email confirmation and password resetting is lost. This makes these tokens much less random than they are expected to be, and so not cryptographically safe.

Resolution

The token generation logic used in the 2.0.x branch based on base64 encoding has been backported. This changes the range of characters used in the token. Any route placeholder expected to match a token generated by FOSUserBundle must be updated to allow dashes, which are not allowed by \w in regexes. A \w+ requirement should so become [\w-]+.

Permalink: https://github.com/advisories/GHSA-pjx8-984p-7p3x
JSON: https://advisories.ecosyste.ms/api/v1/advisories/GSA_kwCzR0hTQS1wang4LTk4NHAtN3AzeM4AA8IW
Source: GitHub Advisory Database
Origin: Unspecified
Severity: Moderate
Classification: General
Published: 7 months ago
Updated: 7 months ago

Identifiers: GHSA-pjx8-984p-7p3x
References:

• https://github.com/FriendsOfSymfony/FOSUserBundle/commit/b3ebfea52065e9727508f5f8e6c9f7459a1b06d8
• https://github.com/FriendsOfPHP/security-advisories/blob/master/friendsofsymfony/user-bundle/2014-09-04-1.yaml
• https://symfony.com/blog/fosuserbundle-entropy-of-generated-tokens-is-lost
• https://github.com/advisories/GHSA-pjx8-984p-7p3x

Repository: https://github.com/FriendsOfSymfony/FOSUserBundle
Blast Radius: 0.0

Affected Packages