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FOSUserBundle Entropy is lost in the TokenGenerator

Moderate severity GitHub Reviewed Published May 15, 2024 to the GitHub Advisory Database • Updated May 15, 2024

Package

composer friendsofsymfony/user-bundle (Composer)

Affected versions

>= 1.0.0, < 1.3.5

Patched versions

1.3.5

Description

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-]+.

References

Published to the GitHub Advisory Database May 15, 2024
Reviewed May 15, 2024
Last updated May 15, 2024

Severity

Moderate

Weaknesses

CVE ID

No known CVE

GHSA ID

GHSA-pjx8-984p-7p3x
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